Slide Library

Part 1 Cover & Roadmap

1. Part 1 Cover & Roadmap
2. How to Use This Part

Meet Python & Your First Program

3. Module 1: Meet Python & Your First Program
4. Where Is This Used in Real Projects?
5. What Is a Program? What Is Python?
6. Python Is Short, Clear and Powerful
7. Installing Python on Windows
8. The Python Shell (IDLE): Talk to Python Directly
9. Writing Scripts in VS Code (Recommended Editor)
10. print(): Show Something on the Screen
11. Printing Text, Numbers and Many Items
12. sep and end: Change the Separator and the Line Ending
13. Comments: Notes That Python Ignores
14. How Python Runs Your Program: Top to Bottom
15. Reading Error Messages: Python Tells You What Went Wrong
16. Three Errors Every Beginner Meets
17. Live Lab: Try It Yourself
18. Coaching Centre Welcome Banner
19. Bus Ticket: Ranchi to Jamshedpur
20. Student ID Card with Tabs and New Lines
21. Fix the Errors (Debugging Challenge)
22. School Timetable Printout
23. Module 1 Recap & Quiz

Variables, Data Types & Input

24. Module 2: Variables, Data Types & Input
25. Where Is This Used in Real Projects?
26. A Variable Is a Named Box That Stores a Value
27. Creating, Printing and Changing Variables
28. Step Through: A Game Score Updating
29. Rules for Naming Variables
30. The 4 Basic Data Types
31. input(): Let the User Type a Value
32. input() Always Gives You a String
33. int(), float() and str(): Change the Type
34. Converting Between Types: What Works, What Breaks
35. Multiple Assignment and Swapping Values
36. Live Lab: Try It Yourself
37. Student Profile Card
38. How Old Will You Be?
39. Rupee to Dollar Converter
40. Tea Stall Bill
41. Distance Unit Converter
42. Module 2 Recap & Quiz

Operators & Expressions

43. Module 3: Operators & Expressions
44. Where Is This Used in Real Projects?
45. The 7 Arithmetic Operators
46. Floor Division and Remainder: Sharing Chocolates
47. Precedence: Python Follows BODMAS
48. Assignment Operators: += -= *= /=
49. Comparison Operators Give True or False
50. Logical Operators: and, or, not
51. round(), abs(), max(), min() and pow()
52. Live Lab: Try It Yourself
53. GST Bill for a Mobile Shop
54. Split the Restaurant Bill
55. Seconds to Hours, Minutes and Seconds
56. Pass or Fail with Booleans
57. Simple Interest and EMI Calculator
58. Module 3 Recap & Quiz

Strings & f-strings

59. Module 4: Strings & f-strings
60. Where Is This Used in Real Projects?
61. Strings: Text in Quotes
62. Every Character Has a Position (Index)
63. Slicing: Cut Out Part of a String
64. String Methods: Built-in Tools for Text
65. split() and join(): Break Text Apart and Put It Together
66. f-strings: The Best Way to Mix Text and Values
67. f-string Alignment: Neat Tables and Bills
68. Escape Characters and the in Operator
69. Step Through: Cleaning a Messy Form Entry
70. Live Lab: Try It Yourself
71. Username Generator
72. Mask a Mobile Number
73. Word and Letter Counter
74. Format an Invoice
75. PAN Number Format Checker
76. Module 4 Recap & Quiz

Decisions: if, elif, else & match

77. Module 5: Decisions: if, elif, else & match
78. Where Is This Used in Real Projects?
79. if: Run Code Only When a Condition Is True
80. if / else: Two Paths
81. The elif Ladder: Many Choices, One Answer
82. Step Through: The Grade Program with marks = 81
83. Nested if: A Decision Inside a Decision
84. Writing Good Conditions: Ranges, and / or, Truthy Values
85. Conditional Expression (Ternary): if / else in One Line
86. match-case: Choose by Matching a Value
87. Top 5 Mistakes with if Statements
88. Live Lab: Try It Yourself
89. JAC Board Grade Calculator
90. Electricity Bill with Slab Rates
91. Login with Username and Password
92. Bus Fare by Age and Distance
93. Restaurant Menu with match-case
94. Module 5 Recap & Quiz

Loops: for, while & range

95. Module 6: Loops: for, while & range
96. Where Is This Used in Real Projects?
97. Without a Loop vs With a Loop
98. range(): A Ready-Made List of Numbers
99. Step Through: Adding Up Monthly Savings
100. for Loops Work on Strings, Lists and More
101. while: Repeat As Long As a Condition Is True
102. break (Stop the Loop) and continue (Skip to Next)
103. while True + break: The Menu Pattern Used in Real Apps
104. Loops Inside Loops: Tables and Patterns
105. Step Through: A 3 x 2 Seating Chart
106. Live Lab: Try It Yourself
107. Multiplication Table Printer
108. Number Guessing Game
109. ATM PIN with 3 Attempts
110. Star Patterns: Pyramid and Diamond
111. Savings Goal Tracker
112. Module 6 Recap & Quiz

Part 1 Complete

113. Part 1 Complete

Part 2 Cover & Roadmap

1. Part 2 Cover & Roadmap
2. How to Use This Part

Lists: Store Many Values

3. Module 7: Lists: Store Many Values
4. Where Is This Used in Real Projects?
5. A List Holds Many Values in Order
6. Lists Are Mutable: Change Any Item
7. Adding and Removing Items (Click to Animate)
8. Sorting, Searching and Counting
9. Looping Over a List: Totals, Averages and Filters
10. Step Through: Finding the Topper Without max()
11. Lists of Lists: Tables, Grids and Seating Charts
12. Copying Lists: b = a Does NOT Make a Copy
13. Live Lab: Try It Yourself
14. Class Marks Analyser
15. Shopping Cart with a Menu
16. To-Do List Manager
17. Top 3 Scorers (Two Lists Together)
18. Exam Hall Seating Chart (2D List)
19. Module 7 Recap & Quiz

Tuples & Sets

20. Module 8: Tuples & Sets
21. Where Is This Used in Real Projects?
22. Tuples: Like a List, But It Cannot Change
23. Packing and Unpacking: Open a Tuple Into Variables
24. When to Use a Tuple vs a List
25. Sets: Unique Items Only, No Order
26. Set Operations: The Venn Diagram in Python
27. Sets in Action: Who Has Not Submitted?
28. Live Lab: Try It Yourself
29. GPS Coordinates of Jharkhand Cities
30. Unique Visitor Counter
31. Mutual Friends Finder
32. Compare Subjects of Two Students
33. Lucky Draw with Unique Entries
34. Module 8 Recap & Quiz

Dictionaries: Key-Value Data

35. Module 9: Dictionaries: Key-Value Data
36. Where Is This Used in Real Projects?
37. A Dictionary Maps Keys to Values
38. Creating a Dictionary and Reading Values
39. Add, Update and Delete (Click to Animate)
40. Looping Through a Dictionary
41. Step Through: Counting Votes with a Dictionary
42. Nested Data: A List of Dictionaries (Like a Table)
43. Nested Dictionaries and Useful Methods
44. Live Lab: Try It Yourself
45. Phone Book Search
46. Price List and Bill
47. Word Frequency Counter
48. Student Report Card (Nested Dict)
49. Jharkhand District Info Lookup
50. Module 9 Recap & Quiz

Functions: Reusable Blocks of Code

51. Module 10: Functions: Reusable Blocks of Code
52. Where Is This Used in Real Projects?
53. A Function Is a Machine: Inputs In, Answer Out
54. Defining and Calling a Function
55. return: Send a Value Back to the Caller
56. Step Through: What Happens When You Call a Function
57. Default Values and Keyword Arguments
58. *args and **kwargs
59. Local vs Global Variables
60. lambda (One-Line Functions) and Docstrings
61. A Function That Calls Itself: Recursion
62. Live Lab: Try It Yourself
63. Reusable GST Function
64. Area Calculator Toolkit
65. Password Strength Checker
66. EMI Planner with Default Arguments
67. Recursion: Factorial and Digit Sum
68. Module 10 Recap & Quiz

Modules, Packages & pip

69. Module 11: Modules, Packages & pip
70. Where Is This Used in Real Projects?
71. Modules: Toolboxes You Can Import
72. Three Ways to Import
73. The math Module: Maths Beyond + - * /
74. The random Module: Games, OTPs and Lucky Draws
75. The datetime Module: Dates, Times and Differences
76. Make Your Own Module (and Import It)
77. pip: Install Packages from the Internet
78. Using an Installed Package: tabulate
79. Live Lab: Try It Yourself
80. OTP Generator
81. Dice Game: First to 20
82. Age and Next Birthday Calculator
83. Your Own Module: school_utils.py
84. Pretty Report with a pip Package
85. Module 11 Recap & Quiz

Part 2 Complete

86. Part 2 Complete

Part 3 Cover & Roadmap

1. Part 3 Cover & Roadmap
2. How to Use This Part

Files: Text, CSV & JSON

3. Module 12: Files: Text, CSV & JSON
4. Where Is This Used in Real Projects?
5. Variables Forget, Files Remember
6. Writing a Text File
7. Reading a Text File: All at Once or Line by Line
8. Append Mode: Add Without Erasing (A Simple Log)
9. File Paths: Where Is My File?
10. CSV Files: Tables That Open in Excel
11. Reading CSV with DictReader: Each Row Becomes a Dict
12. JSON Files: Save Dictionaries and Lists
13. Live Lab: Try It Yourself
14. Daily Diary App
15. Attendance Register in CSV
16. Marks CSV Report Card
17. App Settings in JSON
18. Contact Book That Remembers
19. Module 12 Recap & Quiz

Errors, Exceptions & Debugging

20. Module 13: Errors, Exceptions & Debugging
21. Where Is This Used in Real Projects?
22. Common Exceptions You Will Meet
23. try / except: Catch the Error, Keep Running
24. try / except / else / finally
25. Catch Several Errors and Read the Message with "as e"
26. raise: Create Your Own Error When Data Is Wrong
27. Custom Exceptions for Your App
28. Keep Asking Until the Input Is Valid
29. Reading a Traceback Through Functions
30. Live Lab: Try It Yourself
31. Safe Number Input Function
32. Calculator That Never Crashes
33. Load a File with a Fallback
34. Bank Withdrawal with Custom Errors
35. Validate a Batch of Marks Records
36. Module 13 Recap & Quiz

Classes & Objects (OOP Part 1)

37. Module 14: Classes & Objects (OOP Part 1)
38. Where Is This Used in Real Projects?
39. A Class Is a Blueprint; Objects Are Built From It
40. Writing Your First Class
41. Step Through: Creating Two Bank Accounts
42. Methods That Change and Check Object Data
43. __str__ and __repr__: Make Objects Print Nicely
44. Class Attributes vs Instance Attributes
45. Lists of Objects: Sort, Filter and Report
46. Live Lab: Try It Yourself
47. Student Class with Report Card
48. BankAccount with Mini Statement
49. Product and Cart Classes
50. Mobile Phone Battery Simulator
51. Library Book Issue System
52. Module 14 Recap & Quiz

Inheritance, Polymorphism & Magic Methods

53. Module 15: Inheritance, Polymorphism & Magic Methods
54. Where Is This Used in Real Projects?
55. Inheritance: "Is-A" Relationships
56. Child Classes with super()
57. Step Through: Which Method Runs?
58. Polymorphism: One Interface, Many Forms
59. Protecting Data: _private Names and @property
60. Dunder (Magic) Methods: Make Objects Work with + == < len()
61. Abstract Base Classes: Force Children to Implement Methods
62. Live Lab: Try It Yourself
63. Employee and Manager Payroll
64. Ride Fare Calculator
65. Shapes and a Paint Estimate
66. Money Class with Operators
67. Payment Methods with an Abstract Class
68. Module 15 Recap & Quiz

Pythonic Python: Comprehensions, Generators & Decorators

69. Module 16: Pythonic Python: Comprehensions, Generators & Decorators
70. Where Is This Used in Real Projects?
71. List Comprehensions: Build a List in One Line
72. Dict and Set Comprehensions, and Nested Ones
73. map, filter, zip, enumerate, any and all
74. sorted(), min() and max() with a key Function
75. Iterators: How a for Loop Really Works
76. Generators: Functions That yield Values One at a Time
77. Generators Save Memory: Reading a Big Log File
78. Decorators: Wrap a Function to Add a Feature
79. Decorators in Real Apps: Login Checks and Caching
80. Live Lab: Try It Yourself
81. Marks Filtering with Comprehensions
82. Inter-School Quiz Leaderboard
83. Log File Analyser with a Generator
84. A @timer Decorator for Slow Code
85. login_required and role_required Decorators
86. Module 16 Recap & Quiz

Part 3 Complete

87. Part 3 Complete

Part 4 Cover & Roadmap

1. Part 4 Cover & Roadmap
2. How to Use This Part

Standard Library Power Tools

3. Module 17: Standard Library Power Tools
4. Where Is This Used in Real Projects?
5. datetime: Parse, Format and Calculate with Dates
6. pathlib: List, Create and Inspect Files and Folders
7. shutil: Copy, Move and Back Up
8. collections: Counter, defaultdict, namedtuple, deque
9. Regular Expressions: Find Patterns in Text
10. Using re in Python: search, findall, fullmatch, sub
11. Live Lab: Try It Yourself
12. Fee Due-Date Reminder
13. Downloads Folder Organiser
14. School Captain Election Counter
15. Admission Form Validator with Regex
16. Server Log Summary
17. Module 17 Recap & Quiz

Databases with SQLite

18. Module 18: Databases with SQLite
19. Where Is This Used in Real Projects?
20. A Database Table Is Like a Smart Spreadsheet
21. SQL in 5 Commands (CRUD)
22. Python + SQLite: Connect, Create, Insert, Commit
23. Always Use ? Placeholders (Avoid SQL Injection)
24. SELECT with WHERE, ORDER BY, LIMIT and LIKE
25. Aggregates and GROUP BY: Reports from Data
26. JOIN: Combine Two Related Tables
27. Live Lab: Try It Yourself
28. Student Database with Functions
29. Library Database: Books and Issues
30. Shop Inventory with Low-Stock Alerts
31. Search Contacts with LIKE
32. Monthly Sales Report (GROUP BY + JOIN)
33. Module 18 Recap & Quiz

Data Analysis: NumPy, Pandas & Matplotlib

34. Module 19: Data Analysis: NumPy, Pandas & Matplotlib
35. Where Is This Used in Real Projects?
36. NumPy Arrays: Maths on Whole Lists at Once
37. Pandas DataFrame: A Table in Python
38. Selecting, Filtering and Sorting Rows
39. New Columns, groupby and Summaries
40. Cleaning Messy Data: Spaces, Case, Blanks, Duplicates, Types
41. Matplotlib: Line and Bar Charts
42. Plot Directly from a DataFrame and Export to Excel
43. Live Lab: Try It Yourself
44. Class Result Analysis
45. Rainfall Trend Chart
46. Mobile Shop Sales Dashboard
47. Clean an Admission Sheet
48. Family Expense Pie Chart
49. Module 19 Recap & Quiz

APIs, the Web & Flask

50. Module 20: APIs, the Web & Flask
51. Where Is This Used in Real Projects?
52. Request and Response: The Language of the Web
53. Calling a JSON API with requests
54. Handling Status Codes, Timeouts and Bad Data
55. Reading Web Pages with BeautifulSoup
56. Your First Website with Flask
57. Templates: Fill HTML with Python Data (Jinja2)
58. Handling Forms: GET Shows the Form, POST Receives Data
59. Build a JSON API with Flask
60. Live Lab: Try It Yourself
61. Weather Report for Jharkhand Cities
62. Currency Converter Using a Rates API
63. Coaching Centre Website
64. Student Search Page (Query String + Template)
65. To-Do JSON API (GET, POST, PATCH)
66. Module 20 Recap & Quiz

Part 4 Complete

67. Part 4 Complete

Part 5 Cover & Roadmap

1. Part 5 Cover & Roadmap
2. How to Use This Part

GUI Apps with Tkinter & Office Automation

3. Module 21: GUI Apps with Tkinter & Office Automation
4. Where Are GUIs and Automation Used?
5. Your First Tkinter Window
6. Common Widgets and Layout Managers
7. Read Inputs, Calculate, Show the Result
8. Automating Excel with openpyxl
9. Generate Certificates Automatically with Pillow
10. Rename Hundreds of Files in One Go
11. PDF Reports and Emails (Code to Run on Your Computer)
12. Live Lab: Try It Yourself
13. Tip Calculator Window
14. Login Window with 3 Attempts
15. Stopwatch App with after()
16. Certificates for a Whole Batch
17. Photo Renamer + Excel Log
18. Module 21 Recap & Quiz

Professional Python: Tools & Habits

19. Module 22: Professional Python: Tools & Habits
20. Where Is This Used in Real Projects?
21. venv: A Separate Box of Packages for Each Project
22. Project Structure and PEP 8 Style
23. Type Hints: Say What Types a Function Expects
24. Catch Bugs Before Running: mypy
25. logging: Better Than print for Real Apps
26. Automated Tests with pytest
27. Git: Save Versions and Share Your Code
28. Live Lab: Try It Yourself
29. Typed and Documented Utility Module
30. Write pytest Tests for a Calculator
31. Logging in a Bank App
32. Refactor Messy Code
33. Scaffold a Project Folder
34. Module 22 Recap & Quiz

Capstone Projects

35. Module 23: Capstone Projects
36. Five Projects for Your Portfolio
37. Project 1: Student Result Management System
38. Result Management System (full code)
39. Project 2: Expense Tracker with Charts
40. Expense Tracker (full code)
41. Project 3: Quiz Game with High Scores
42. Quiz Game (full code)
43. Project 4: Library Management System
44. Library Management (full code)
45. Project 5: Jharkhand Weather Dashboard (API + Flask)
46. Weather Dashboard (full code)
47. Where Python Can Take You
48. Congratulations, Python Programmer!
49. Module 23 Recap & Quiz

Part 5 Complete

50. Part 5 Complete

Part 1 Cover & Roadmap

1. Part 1 Cover & Roadmap
2. How to Use This Part

Meet Java & Your First Program

3. Module 1: Meet Java & Your First Program
4. Where Is This Used in Real Projects?
5. What Is Java?
6. JDK, JRE and JVM: Boxes Inside Boxes
7. Installing JDK 21 on Windows
8. Your First Java Program
9. Reading the main Method Word by Word
10. Two Ways to Run a Java Program
11. println, print and printf
12. Comments and Escape Sequences
13. How Java Runs Your Program: Top to Bottom
14. Compile-Time Errors vs Run-Time Errors
15. Java Naming Rules and Conventions
16. Code Lab: Try It Yourself
17. Coaching Centre Welcome Banner
18. Student ID Card with Escape Sequences
19. Bus Ticket: Ranchi to Jamshedpur
20. Fix the Errors (Debugging Challenge)
21. Marks Calculator in println
22. School Timetable with printf Columns
23. Java Coffee Cup in ASCII Art
24. Fee Receipt with printf Formatting
25. Two Classes in One Program
26. Command-Line Report Card
27. Module 1 Recap & Quiz

Variables, Data Types & Operators

28. Module 2: Variables, Data Types & Operators
29. Where Is This Used in Real Projects?
30. A Variable Is a Named, Typed Box
31. The 8 Primitive Types (and String)
32. Declaring Variables of Every Type
33. Type Casting: Converting Between Types
34. Constants with final, and var
35. Arithmetic Operators (and Integer Division)
36. Step Through: Increment, Decrement and Shortcuts
37. Relational and Logical Operators
38. Operator Precedence: Who Goes First?
39. Code Lab: Try It Yourself
40. Student Profile with Variables
41. Temperature Converter
42. Simple Interest
43. Area and Perimeter Calculator
44. Swap Two Values
45. Seconds to Hours, Minutes, Seconds
46. GST Bill with Correct Rounding
47. Character Codes and Letters
48. EMI Calculator
49. Overflow and the Right Type
50. Module 2 Recap & Quiz

Input & Output: Scanner, printf & Math

51. Module 3: Input & Output: Scanner, printf & Math
52. Where Is This Used in Real Projects?
53. Reading Input with Scanner
54. nextInt() then nextLine(): The Most Common Scanner Bug
55. Formatting Output with printf and String.format
56. The Math Class: Ready-Made Maths
57. Random Numbers: Random and Math.random()
58. Step Through: A Tea-Stall Bill That Asks Questions
59. Code Lab: Try It Yourself
60. Greeting Card from Input
61. Tea Stall Bill
62. Circle Calculator
63. Rupee to Dollar Converter
64. Dice Roller
65. BMI Calculator
66. OTP Generator and Check
67. Split the Restaurant Bill
68. Number Statistics from 5 Inputs
69. Mini Calculator with Math Functions
70. Module 3 Recap & Quiz

Decisions: if, else & switch

71. Module 4: Decisions: if, else & switch
72. Where Is This Used in Real Projects?
73. if and else: Run Code Only When a Condition Is True
74. A Real Example: Voting Eligibility
75. The else-if Ladder: Many Choices, One Answer
76. Step Through: The Grade Program with marks = 81
77. Nested if and Combined Conditions
78. The Ternary Operator: if-else in One Expression
79. switch: Choose by Matching a Value
80. Switch Expressions with Arrows (Java 14+)
81. Top Mistakes with Decisions in Java
82. Code Lab: Try It Yourself
83. Even or Odd
84. Pass or Fail
85. Largest of Three Numbers
86. Leap Year Checker
87. Day Name with switch
88. JAC Grade Calculator
89. Electricity Bill with Slabs
90. Login with Rules
91. Bus Fare Rules
92. Triangle Classifier
93. Module 4 Recap & Quiz

Loops: for, while & do-while

94. Module 5: Loops: for, while & do-while
95. Where Is This Used in Real Projects?
96. The for Loop: Repeat a Known Number of Times
97. The Loop Flowchart
98. Step Through: Adding Up Monthly Savings
99. while Loops: Repeat Until Something Happens
100. do-while: Run at Least Once (Menus)
101. break, continue and Labelled break
102. Nested Loops: Tables and Patterns
103. Step Through: A 3 x 2 Seating Chart
104. Code Lab: Try It Yourself
105. Multiplication Table
106. Sum and Average of N Marks
107. Countdown Timer
108. Digits of a Number
109. Number Guessing Game
110. ATM PIN with 3 Attempts
111. Prime Numbers in a Range
112. Pyramid and Diamond Patterns
113. Savings Goal Simulator
114. Simple Interactive Quiz
115. Module 5 Recap & Quiz

Part 1 Complete

116. Part 1 Complete

Part 2 Cover & Roadmap

1. Part 2 Cover & Roadmap
2. How to Use This Part

Methods: Reusable Blocks of Code

3. Module 6: Methods: Reusable Blocks of Code
4. Where Is This Used in Real Projects?
5. A Method Is a Machine: Inputs In, Answer Out
6. Defining and Calling Methods
7. Step Through: What Happens When a Method Is Called
8. Return a Value vs Print It
9. Method Overloading: Same Name, Different Parameters
10. Pass-by-Value: The Method Gets a Copy
11. Variable Scope and Varargs (...)
12. Recursion: A Method That Calls Itself
13. Code Lab: Try It Yourself
14. Greeting Method
15. Area Methods
16. Boolean Check Methods
17. Max of Three with a Method
18. GST Method with Default Rate (Overloading)
19. Prime Checker Used in a Loop
20. Factorial: Loop vs Recursion
21. Recursion Toolkit
22. EMI Planner Built from Methods
23. Menu Calculator from Methods
24. Module 6 Recap & Quiz

Arrays: Storing Many Values

25. Module 7: Arrays: Storing Many Values
26. Where Is This Used in Real Projects?
27. An Array Is a Row of Numbered Boxes
28. Creating, Reading and Changing an Array
29. Watch Array Operations Step by Step
30. Step Through: Sum and Average with a Loop
31. The Enhanced for (for-each) Loop
32. Arrays Live on the Heap: Variables Hold a Reference
33. java.util.Arrays: Ready-Made Tools
34. ArrayIndexOutOfBoundsException
35. 2D Arrays: Tables of Rows and Columns
36. Looping Through a 2D Array: Report Card Totals
37. From Array to Chart: Monthly Electricity Units
38. Code Lab: Try It Yourself
39. Subject Marks Card
40. Highest and Lowest Price
41. Count Pass and Fail
42. Linear Search for a Roll Number
43. Reverse and Rotate
44. Electricity Bill Analyser
45. Frequency Counter (Dice Rolls)
46. Bubble Sort with Pass Display
47. Cinema Seat Booking (2D Array)
48. Class Result Matrix with Toppers
49. Module 7 Recap & Quiz

Strings and StringBuilder

50. Module 8: Strings and StringBuilder
51. Where Is This Used in Real Projects?
52. A String Is a Sequence of Characters
53. Common String Methods in jshell
54. Comparing Strings: equals() vs ==
55. Strings Are Immutable: Methods Make New Strings
56. Working Character by Character
57. split(), join() and String.format()
58. StringBuilder: Editing Text in Place
59. Why StringBuilder: Building a Long Receipt
60. Code Lab: Try It Yourself
61. Name Formatter
62. Email Checker
63. Vowel and Word Counter
64. Palindrome and Reverse
65. CSV Line Parser
66. Password Strength Meter
67. Vehicle Number Validator
68. SMS Template Filler
69. Text Analyser: Most Frequent Letter
70. Simple Login System
71. Module 8 Recap & Quiz

Part 2 Complete

72. Part 2 Complete

Part 3 Cover & Roadmap

1. Part 3 Cover & Roadmap
2. How to Use This Part

Classes and Objects

3. Module 9: Classes and Objects
4. Where Is This Used in Real Projects?
5. Class = Blueprint, Object = Real Thing Built from It
6. Writing a Class and Creating Objects
7. What new Does: Reference on the Stack, Object on the Heap
8. Constructors: Set Up an Object When It Is Created
9. Step Through: Constructor and Method Calls
10. toString(): How an Object Prints Itself
11. An Array of Objects: A Shopping Cart
12. null and NullPointerException
13. Code Lab: Try It Yourself
14. Rectangle Class
15. Student with Constructor
16. Book with Two Constructors
17. Bank Account Object
18. Two References, One Object
19. Shopping Cart with Products
20. Time Class (hours and minutes)
21. Train Ticket Booking Model
22. Library Issue System
23. Student Ranking from Objects
24. Module 9 Recap & Quiz

Encapsulation, static and Packages

25. Module 10: Encapsulation, static and Packages
26. Where Is This Used in Real Projects?
27. The Problem: Anyone Can Break a Public Field
28. Encapsulation: Data Inside a Capsule
29. Private Fields, Getters, Setters and Validation
30. Setters That Protect Data
31. Access Modifiers: Who Can See What?
32. static: Belongs to the Class, Shared by All Objects
33. Step Through: A Static Counter Makes Roll Numbers
34. final Constants and a static Utility Class
35. Packages: Folders for Your Classes
36. Code Lab: Try It Yourself
37. Encapsulated Student
38. Temperature with Validation
39. Object Counter with static
40. Maths Utility Class
41. Immutable Money Value
42. Mobile Wallet
43. Invoice Number Generator
44. Package-Organised Project
45. Library Member with Fine Rules
46. Employee Payroll with Validation
47. Module 10 Recap & Quiz

Inheritance and Polymorphism

48. Module 11: Inheritance and Polymorphism
49. Where Is This Used in Real Projects?
50. Inheritance: Children Get What the Parent Has
51. extends and super(): Building on a Parent
52. Overriding and super.method(): Extend, Don't Repeat
53. Step Through: One Variable Type, Different Behaviour
54. Polymorphism in Real Code: Add Types Without Changing Old Code
55. Every Class Extends Object: equals() and toString()
56. instanceof and Casting: Using the Child's Extra Features
57. is-a vs has-a: Inheritance or Composition?
58. Code Lab: Try It Yourself
59. Animal Sounds
60. Person and Student
61. Constructor Chain Order
62. Toll Plaza Calculator
63. Bank Account Types
64. Salary System with super.method()
65. equals() for Products
66. Notification Senders
67. Game Characters Battle
68. Shape Area Report with Composition
69. Module 11 Recap & Quiz

Abstract Classes and Interfaces

70. Module 12: Abstract Classes and Interfaces
71. Where Is This Used in Real Projects?
72. Abstract Classes: Partly Built, Must Be Completed
73. An Interface Is a Contract: "Any Class That Signs Must Do These"
74. Writing and Implementing an Interface
75. One Class, Many Interfaces (+ default methods)
76. Abstract Class vs Interface: Which One?
77. Step Through: Code Written Against an Interface
78. Functional Interfaces: One Method, Ready for Lambdas
79. Code Lab: Try It Yourself
80. Abstract Shape Area
81. Switchable Devices
82. Interface Constants and static Method
83. Payment Gateway Contract
84. Abstract Employee with Template
85. Comparable Students
86. Report Exporters (Plug-ins)
87. Vehicle Abstract + Trackable Interface
88. Online Exam Question Types
89. Pluggable Discount Engine
90. Module 12 Recap & Quiz

Exception Handling

91. Module 13: Exception Handling
92. Where Is This Used in Real Projects?
93. What Happens Without Exception Handling
94. try and catch: Handle the Problem, Keep Running
95. Step Through: How Control Jumps to catch and finally
96. The Exception Family Tree: Checked vs Unchecked
97. throw: Report a Problem Yourself
98. Custom Exceptions and throws
99. finally and try-with-resources: Always Clean Up
100. Exception Handling Rules Used by Professionals
101. Code Lab: Try It Yourself
102. Safe Division
103. Number Parser
104. Array Index Guard
105. Re-ask Until Valid Input
106. Age Validator with throw
107. ATM with Custom Exception
108. Stack Trace Reader
109. Order Processor with Exception Chain
110. Robust Marks Importer
111. Resource Manager with try-with-resources
112. Module 13 Recap & Quiz

Part 3 Complete

113. Part 3 Complete

Part 4 Cover & Roadmap

1. Part 4 Cover & Roadmap
2. How to Use This Part

Wrappers, Enums, Records and Generics

3. Module 14: Wrappers, Enums, Records and Generics
4. Where Is This Used in Real Projects?
5. Wrapper Classes: Primitives as Objects
6. enum: A Fixed Set of Named Values
7. Enums with Fields and Methods: Order Status
8. record: A Data Class in One Line
9. Generics: One Class for Any Type, Still Type-Safe
10. Generic Methods and Bounded Types
11. Code Lab: Try It Yourself
12. Wrapper Conversions
13. Days of the Week Enum
14. Student Record
15. Electricity Slab Enum
16. Generic Pair Utility
17. Order Tracking State Machine
18. Generic Stack for Undo
19. Bounded Generic Statistics
20. Inventory with Enums, Records and Generics
21. Generic Leaderboard
22. Module 14 Recap & Quiz

Collections I: List, Set, Queue

23. Module 15: Collections I: List, Set, Queue
24. Where Is This Used in Real Projects?
25. The Collections Framework Family
26. ArrayList: A List That Grows
27. Watch an ArrayList Change
28. Looping Through a List Safely
29. A List of Objects + Collections Utilities
30. Sets: No Duplicates Allowed
31. Set Operations: Union, Intersection, Difference
32. Queue and Deque: First In, First Out (and Stacks)
33. Watch a Queue at the Hospital Counter
34. PriorityQueue: Most Urgent First
35. Code Lab: Try It Yourself
36. Class Attendance List
37. Marks List Statistics
38. Remove Duplicate Emails
39. Wishlist and Cart
40. Browser History with Deque
41. Hospital Token System
42. Common Friends with Sets
43. Library Waitlist with Iterator
44. Exam Seating Planner
45. Print Job Scheduler
46. Module 15 Recap & Quiz

Collections II: Maps and Sorting

47. Module 16: Collections II: Maps and Sorting
48. Where Is This Used in Real Projects?
49. A Map Connects Keys to Values
50. HashMap Basics: put, get, remove
51. Watch a Map Change
52. Looping Over a Map with entrySet()
53. Step Through: Counting Votes with merge()
54. Comparable: Teach Your Class Its Natural Order
55. Comparator: Sort Any Way You Like
56. Which Collection Should I Use?
57. Code Lab: Try It Yourself
58. Phone Book
59. Word Counter
60. Price Catalogue Lookup
61. Election Vote Counter
62. Sort Products Many Ways
63. Group Students by City
64. Inventory Stock Manager
65. Merit List with Tie-Breaking
66. Train Reservation Chart
67. Sales Report by City and Month
68. Module 16 Recap & Quiz

Lambdas and the Stream API

69. Module 17: Lambdas and the Stream API
70. Where Is This Used in Real Projects?
71. A Lambda Is a Short, Unnamed Method
72. Predicate, Function, Consumer, Supplier
73. Method References: Even Shorter Lambdas
74. Streams: A Pipeline for Data
75. filter, map, sorted, limit, toList
76. Watch Items Flow Through a Stream
77. Numbers from Streams: count, sum, average, max
78. Collectors: groupingBy, counting, joining, toMap
79. Code Lab: Try It Yourself
80. Lambda Calculator
81. Filter Even and Square
82. Name Formatter with Streams
83. Product Search Filter
84. Class Result Summary
85. Order Analytics
86. Word Frequency Top 5
87. Employee Report with Collectors
88. Railway Booking Analytics
89. Lazy Evaluation and Infinite Streams
90. Module 17 Recap & Quiz

Part 4 Complete

91. Part 4 Complete

Part 5 Cover & Roadmap

1. Part 5 Cover & Roadmap
2. How to Use This Part

Files and Date-Time

3. Module 18: Files and Date-Time
4. Where Is This Used in Real Projects?
5. Files Keep Data When the Program Stops
6. Writing and Reading a Text File
7. Reading a CSV File into Objects
8. BufferedReader and BufferedWriter for Big Files
9. Handling a Missing File Gracefully
10. java.time: Dates and Times Done Right
11. Period, Duration and ChronoUnit: Measuring Gaps
12. DateTimeFormatter: Show and Read Dates Indian Style
13. Code Lab: Try It Yourself
14. Save a Shopping List
15. Days Until an Event
16. Age Calculator
17. Attendance Log File
18. Fee Due Date Calculator
19. Marks Report Writer
20. EMI Schedule with Dates
21. Log File Analyser
22. Library Due Tracker with File Storage
23. Shop Opening Hours Checker
24. Module 18 Recap & Quiz

Multithreading and Concurrency

25. Module 19: Multithreading and Concurrency
26. Where Is This Used in Real Projects?
27. A Thread Is an Independent Path of Execution
28. Creating and Starting Threads
29. The Danger: Race Conditions on Shared Data
30. How an Update Gets Lost
31. ExecutorService: A Pool of Worker Threads
32. AtomicInteger and ConcurrentHashMap
33. CompletableFuture: Chain Async Steps
34. Code Lab: Try It Yourself
35. Two Threads Counting
36. Countdown Timer Thread
37. Synchronized Bank Balance
38. Parallel Sum with a Thread Pool
39. Website Hit Counter
40. Ticket Booking Without Double Booking
41. Producer-Consumer Order Queue
42. Parallel Price Comparison with CompletableFuture
43. Multi-Threaded File Word Counter
44. Rate-Limited Downloader
45. Module 19 Recap & Quiz

JDBC Databases and Modern Java

46. Module 20: JDBC Databases and Modern Java
47. Where Is This Used in Real Projects?
48. JDBC: How Java Talks to a Database
49. Create a Table and Insert Rows
50. SELECT: Reading Rows with ResultSet
51. UPDATE, DELETE and Transactions
52. The DAO Pattern: Keep SQL in One Place
53. Modern Java: var, Text Blocks, switch Expressions
54. Sealed Types and Pattern Matching (Java 17-21)
55. Professional Tools: Maven/Gradle and JUnit Testing
56. Code Lab: Try It Yourself
57. Contacts Table
58. var and Text Blocks
59. Switch Expression Grader
60. Search with PreparedStatement
61. Sealed Shapes
62. Student DAO
63. Record Patterns for API Responses
64. Bank Transfer with Transaction
65. Mini Inventory System with JDBC
66. Modern Java Order Pipeline
67. Module 20 Recap & Quiz

Capstone Projects

68. Module 21: Capstone Projects
69. Where Is This Used in Real Projects?
70. How Professionals Plan a Java Project
71. Project Roadmap: From Starter to Capstone
72. Starter 1: Jharkhand GK Quiz Game
73. Starter 2: Unit Converter
74. Starter 3: Restaurant Bill Splitter
75. Starter 4: Number Game with High Score File
76. Starter 5: To-Do Manager
77. Capstone 1: Student Result Management System
78. Capstone 2: Bank Account System
79. Capstone 3: Library Manager with SQLite
80. Capstone 4: Railway Reservation with Waitlist
81. Capstone 5: E-commerce Orders and Analytics
82. Your Java Journey Continues
83. Module 21 Recap & Quiz

Part 5 Complete

84. Part 5 Complete

1. Title
2. Why C
3. Course map
4. Syllabus · Days 1–10
5. Syllabus · Days 11–20
6. How to use this deck
7. Setup — compiler & editor
8. The compilation pipeline

Module 1 · Foundations

9. Module 1 · Foundations

Day 1 · Your first C program

10. Day 1 · Your first C program
11. What C is
12. Anatomy of a C program
13. Hello, world
14. Compile & run

Day 2 · Thinking before coding

15. Day 2 · Thinking before coding
16. Algorithms & flowcharts
17. Tokens & identifiers
18. Comments & style
19. Four kinds of error
20. Practical 1 · Electricity bill

Module 2 · Data & operators

21. Module 2 · Data & operators

Day 3 · Data, variables & constants

22. Day 3 · Data, variables & constants
23. Data types & sizeof
24. Variables & declaration
25. Constants — const vs #define
26. Literals & escape sequences
27. Format specifiers

Day 4 · Operators

28. Day 4 · Operators
29. Arithmetic & assignment
30. Relational & logical
31. Bitwise operators
32. Precedence & associativity
33. Type conversion & casting
34. Practical 2 · Interest & swapping

Module 3 · Input & output

35. Module 3 · Input & output

Day 5 · Talking to the user

36. Day 5 · Talking to the user
37. printf in depth
38. scanf & the ampersand
39. Character I/O
40. The input buffer trap
41. Practical 3 · Student mark sheet
42. Practice 1 · Days 1–5
43. Test 1 · Days 1–5

Module 4 · Control flow

44. Module 4 · Control flow

Day 6 · Making decisions

45. Day 6 · Making decisions
46. if, if-else, else-if
47. Nested if & common traps
48. switch & fall-through
49. goto — and why not

Day 7 · Repeating work

50. Day 7 · Repeating work
51. while & do-while
52. for — anatomy
53. Choosing the right loop
54. break & continue
55. Nested loops & patterns
56. Dry-running a loop
57. Practical 4 · Menu calculator
58. Practice 2 · Days 6–7
59. Test 2 · Days 6–7

Module 5 · Functions & recursion

60. Module 5 · Functions & recursion

Day 8 · Breaking work into functions

61. Day 8 · Breaking work into functions
62. Why functions
63. Declaration, definition, call
64. Parameters & arguments
65. Call by value
66. Scope — local & global
67. Storage classes

Day 9 · Recursion

68. Day 9 · Recursion
69. How recursion works
70. The call stack
71. Recursion vs iteration
72. Practical 5 · Math utility library

Module 6 · Arrays & strings

73. Module 6 · Arrays & strings

Day 10 · Arrays, search & sort

74. Day 10 · Arrays, search & sort
75. Array memory model
76. Declaring & traversing
77. Linear vs binary search
78. Bubble & selection sort
79. Insertion sort

Day 11 · 2D arrays & strings

80. Day 11 · 2D arrays & strings
81. 2D arrays & matrices
82. Strings are char arrays
83. The null terminator
84. string.h
85. Writing your own strlen
86. Array of strings
87. Practical 6 · Matrix & palindrome
88. Practice 3 · Days 8–11
89. Test 3 · Days 8–11

Module 7 · Pointers

90. Module 7 · Pointers

Day 12 · Addresses & dereferencing

91. Day 12 · Addresses & dereferencing
92. What a pointer is
93. & and *
94. Pointer arithmetic
95. Pointers & arrays
96. Call by reference
97. NULL, wild & dangling

Day 13 · Pointers at work

98. Day 13 · Pointers at work
99. Pointers & strings
100. Array of pointers
101. Pointer to pointer
102. Pointer to function
103. Practical 7 · Sorting through pointers

Module 8 · Dynamic memory

104. Module 8 · Dynamic memory

Day 14 · malloc & free

105. Day 14 · malloc & free
106. Stack vs heap
107. malloc, calloc, realloc, free
108. Always check the return
109. Leaks, double frees & dangling
110. Dynamic 2D arrays
111. Practical 8 · Marks array sized at runtime
112. Practice 4 · Days 12–14
113. Test 4 · Days 12–14

Module 9 · Structures

114. Module 9 · Structures

Day 15 · struct

115. Day 15 · struct
116. Why struct
117. Declaring & initialising
118. Arrays of structs
119. Nested structs
120. struct pointers & ->
121. Passing structs to functions

Day 16 · typedef, union, enum

122. Day 16 · typedef, union, enum
123. typedef
124. union
125. enum
126. Padding & sizeof
127. Practical 9 · Bank account system

Module 10 · Files & the preprocessor

128. Module 10 · Files & the preprocessor

Day 17 · Making data survive

129. Day 17 · Making data survive
130. FILE * and fopen modes
131. Text I/O — fprintf & fgets
132. Binary I/O — fread & fwrite
133. Seeking & telling
134. Handling file errors
135. The preprocessor
136. Macros with arguments
137. Headers & multi-file builds
138. Practical 10 · Save & load records
139. Practice 5 · Days 15–17
140. Test 5 · Days 15–17

Module 11 · Data structures in C

141. Module 11 · Data structures in C

Day 18 · Linked lists

142. Day 18 · Linked lists
143. What a data structure is
144. Self-referential structs
145. Building a node
146. Insert — front, end, position
147. Delete & search
148. Traversing & freeing

Day 19 · Stacks & queues

149. Day 19 · Stacks & queues
150. Stack — array
151. Stack — linked
152. Balanced parentheses
153. Queue & circular queue

Day 20 · Choosing & comparing

154. Day 20 · Choosing & comparing
155. Doubly linked list
156. Big-O, without the maths
157. Array vs list vs stack vs queue
158. Practical 11 · Phone book
159. Practice 6 · Days 18–20
160. Test 6 · Days 18–20

Capstone · Student Record System

161. Capstone · Student Record System
162. student.h
163. Record operations
164. The file layer
165. The menu & report
166. Extend it
167. Cheat sheet
168. Glossary
169. 20-day checklist
170. Where C takes you next
171. You're ready
172. Your final test

1. Title
2. Why Django
3. What We'll Cover
4. Setup & First Run

Section 1 · Foundations

5. Section 1 · Foundations
6. The MVT pattern
7. Project vs App
8. settings.py
9. URLs
10. Views
11. Templates & context
12. 🔧 Build · Home Page
13. 📝 Test · Foundations

Section 2 · Models & DB

14. Section 2 · Models & DB
15. Models
16. Migrations
17. The Admin
18. The ORM
19. Relationships
20. 🔧 Build · Save & List
21. 📝 Test · Models & DB

Section 3 · Forms & Templates

22. Section 3 · Forms & Templates
23. Template language
24. Inheritance & static
25. Styling with CSS
26. Images & polish
27. Forms & POST
28. Django Forms
29. 🔧 Build · Prompt Form
30. 📝 Test · Forms & Templates

Section 4 · Wiring the AI

31. Section 4 · Wiring the AI
32. API keys & settings
33. The AI service
34. AI in a view
35. Show the result
36. JsonResponse
37. 🔧 Build · MCQ Generator
38. 📝 Test · Wiring the AI

Section 5 · Ship it

39. Section 5 · Ship it
40. File uploads
41. User logins
42. Deployment basics
43. Recap · Concept → Project
44. Practice Challenges
45. You're Ready

1. Title
2. Why AI APIs?
3. The Road Ahead
4. Get a Free Key & Setup

Module 1 · Foundations & Service Layer

5. Module 1 · Foundations & Service Layer
6. Architecture · thin views
7. Environment setup
8. Init the project
9. Secrets — .env & load_dotenv
10. GeminiService class
11. First text call — generate_text
12. 🔌 Simulation · SDK first call
13. 📝 Test · Foundations

Module 2 · Level 1 — Text Generator

14. Module 2 · Level 1 — Text Generator
15. text_generator_view
16. text_gen.html template
17. 🔌 Simulation · Text generator
18. 📝 Test · Level 1 Text

Module 3 · Level 2 — Vision

19. Module 3 · Level 2 — Vision
20. analyze_image — Pillow + SDK
21. image_analyzer_view
22. image_analyzer.html — enctype
23. Image tokens & resizing
24. 🔌 Simulation · Image analyzer
25. 📝 Test · Level 2 Vision

Module 4 · Level 3 — Structured JSON

26. Module 4 · Level 3 — Structured JSON
27. Why Pydantic — not regex
28. RecipeSchema — Pydantic model
29. generate_structured_json config
30. api_generate_recipe view
31. 🔌 Simulation · Structured JSON recipe
32. 📝 Test · Level 3 Structured JSON
33. Bonus · Beyond the Basics
34. Conversation memory — SDK chats
35. Swap the provider
36. Production best practices
37. Capstone · Routing
38. Capstone · Run & test endpoints
39. Capstone · You built it
40. Recap · Concept → Project
41. Practice Challenges
42. You're Ready

Part 1 Introduction

1. Part 1 cover

M1 Meet React & Project Setup

2. Module 1: Meet React & Project Setup
3. What is a User Interface (UI)?
4. Where is this used in real apps?
5. Why React? Plain JavaScript vs React
6. Components are like LEGO bricks
7. Single Page App (SPA) vs Multi-Page Website
8. The Virtual DOM: how React stays fast
9. Tools you need (all free)
10. Create & run your first React app with Vite
11. Project folder structure explained
12. How React puts App on the screen
13. Your first component (live!)
14. 3 golden rules of components
15. React Developer Tools
16. Ex 1 (Easy): Welcome Banner
17. Ex 2 (Easy): Dashboard Header with Today's Date
18. Ex 3 (Easy): Institute Contact Card
19. Ex 4 (Easy): Reusing a Component
20. Ex 5 (Easy): Page Skeleton: Header, Main, Footer
21. Ex 6 (Medium): Greeting by Time of Day
22. Ex 7 (Medium): Course Fee Calculator
23. Ex 8 (Medium): Product Card Grid from an Array
24. Ex 9 (Hard): Coaching Institute Landing Page
25. Ex 10 (Hard): Student ID Card Generator
26. Quick Quiz
27. Recap: What you learned

M2 JSX in Depth

28. Module 2: JSX in Depth
29. What is JSX? (It is secretly JavaScript)
30. JSX vs HTML: 7 differences to remember
31. Curly braces { }: windows into JavaScript
32. Attributes & the style object
33. Fragments: group without an extra box
34. Images in JSX
35. Common JSX errors and how to fix them
36. Ex 1 (Easy): Convert Old HTML to JSX
37. Ex 2 (Easy): Student Marks Card
38. Ex 3 (Easy): Payment Status Badges
39. Ex 4 (Easy): Jharkhand Tourist Gallery
40. Ex 5 (Easy): Result Table with Fragments
41. Ex 6 (Medium): Online / Offline Chat Indicator
42. Ex 7 (Medium): Active Menu Highlight
43. Ex 8 (Medium): Weekly Class Timetable
44. Ex 9 (Hard): Shop Invoice in Rupees
45. Ex 10 (Hard): Weather Card with Dynamic Styling
46. Quick Quiz
47. Recap: What you learned

M3 Components & Props

48. Module 3: Components & Props
49. Where is this used in real apps?
50. How props travel from parent to child
51. Props in action + destructuring
52. Props are READ-ONLY
53. Default values & any type of prop
54. The special children prop
55. Components in separate files
56. Plan first: draw the component tree
57. Ex 1 (Easy): Greeting with a name Prop
58. Ex 2 (Easy): Reusable Course Card
59. Ex 3 (Easy): Avatar with Initials Fallback
60. Ex 4 (Easy): Button Component with Variants
61. Ex 5 (Easy): Card Wrapper with children
62. Ex 6 (Medium): Product List to Product Cards
63. Ex 7 (Medium): Profile Page in Multiple Files
64. Ex 8 (Medium): Star Rating from a Number
65. Ex 9 (Hard): Reusable Data Table
66. Ex 10 (Hard): Dashboard Shell Layout
67. Quick Quiz
68. Recap: What you learned

M4 Styling React Apps

69. Module 4: Styling React Apps
70. 5 ways to style React (overview)
71. Way 1: a CSS file + className
72. Conditional classNames
73. CSS Modules: class names that never clash
74. CSS Modules live
75. Tailwind CSS: styling with utility classes
76. Transitions & animations
77. Ex 1 (Easy): Notice Board with a CSS File
78. Ex 2 (Easy): Progress Bars from a Value
79. Ex 3 (Easy): Fee Status Chips
80. Ex 4 (Easy): CSS Module Button
81. Ex 5 (Easy): Animated Navigation Menu
82. Ex 6 (Medium): Responsive Course Grid
83. Ex 7 (Medium): Light & Dark Themes with CSS Variables
84. Ex 8 (Medium): SVG Icon Components
85. Ex 9 (Hard): SaaS Pricing Table
86. Ex 10 (Hard): Loading Skeleton & Hover-Lift Cards
87. Quick Quiz
88. Recap: What you learned

Part 2 Introduction

1. Part 2 cover

M5 Events & State (useState)

2. Module 5: Events & State (useState)
3. Where is this used in real apps?
4. Handling events: onClick
5. The event object
6. Why a normal variable does NOT work
7. useState: anatomy of a hook
8. The render cycle: what happens on every click
9. State is a snapshot: use updater functions
10. Objects & arrays in state: always make a copy
11. Objects & arrays in state (live)
12. Rules of Hooks (very important)
13. Ex 1 (Easy): Like Button
14. Ex 2 (Easy): Show / Hide Password
15. Ex 3 (Easy): Dark Mode Toggle
16. Ex 4 (Easy): Quantity Stepper (1 to 10)
17. Ex 5 (Easy): Feedback Character Counter
18. Ex 6 (Medium): Image Slider (Carousel)
19. Ex 7 (Medium): Course Details Tabs
20. Ex 8 (Medium): FAQ Accordion
21. Ex 9 (Hard): Shopping Cart with Totals
22. Ex 10 (Hard): Tic-Tac-Toe with Winner Detection
23. Quick Quiz
24. Recap: What you learned

M6 Conditional Rendering & Lists

25. Module 6: Conditional Rendering & Lists
26. Where is this used in real apps?
27. if / else and early return
28. Ternary, && and the 0 trap
29. Lookup objects & returning null
30. Rendering lists with map()
31. Why keys matter (live bug demo)
32. Filter & sort BEFORE you render
33. Ex 1 (Easy): Login / Logout Navbar
34. Ex 2 (Easy): Notification Badge
35. Ex 3 (Easy): Student List with Keys
36. Ex 4 (Easy): Empty Orders State
37. Ex 5 (Easy): Order Status Labels
38. Ex 6 (Medium): Search Jharkhand Cities
39. Ex 7 (Medium): Sort Products
40. Ex 8 (Medium): Students Grouped by Section
41. Ex 9 (Hard): Todo App with Filters
42. Ex 10 (Hard): Paginated Admin Table
43. Quick Quiz
44. Recap: What you learned

M7 Forms in React

45. Module 7: Forms in React
46. Where is this used in real apps?
47. Controlled inputs: React is the boss of the input
48. Text inputs & textarea
49. Select, checkbox & radio
50. One handler for many fields
51. Submitting a form
52. Validation: check before you send
53. Ex 1 (Easy): Live Name Preview
54. Ex 2 (Easy): Newsletter Subscribe
55. Ex 3 (Easy): Course Select Shows Fee
56. Ex 4 (Easy): Accept Terms Checkbox
57. Ex 5 (Easy): Batch Timing Radio Buttons
58. Ex 6 (Medium): Admission Enquiry Form
59. Ex 7 (Medium): Login Form with Validation
60. Ex 8 (Medium): Add / Remove Phone Numbers
61. Ex 9 (Hard): 3-Step Registration Wizard
62. Ex 10 (Hard): Job Application with Review Screen
63. Quick Quiz
64. Recap: What you learned

M8 Sharing State & Thinking in React

65. Module 8: Sharing State & Thinking in React
66. Where is this used in real apps?
67. Data flows DOWN, events flow UP
68. The problem: components out of sync
69. Lifting state up
70. Lifted state: now they stay in sync
71. Derived state: do not store what you can calculate
72. Thinking in React: the 5-step method
73. Prop drilling: when lifting goes too far
74. Ex 1 (Easy): Child Buttons Control Parent Counter
75. Ex 2 (Easy): Child Input Updates Parent Heading
76. Ex 3 (Easy): Celsius / Fahrenheit Sync
77. Ex 4 (Easy): Master-Detail View
78. Ex 5 (Easy): Rating Picker Reports to Parent
79. Ex 6 (Medium): Filterable Product Table
80. Ex 7 (Medium): Navbar Cart Badge from a Sibling
81. Ex 8 (Medium): Accordion: Only One Open
82. Ex 9 (Hard): Quiz App with Scoreboard
83. Ex 10 (Hard): Mini Kanban Board
84. Quick Quiz
85. Recap: What you learned

Part 3 Introduction

1. Part 3 cover

M9 useEffect & the Component Lifecycle

2. Module 9: useEffect & the Component Lifecycle
3. Where is this used in real apps?
4. Pure rendering vs side effects
5. useEffect: your first effect
6. The dependency array: 3 cases
7. The 3 cases live
8. Lifecycle & cleanup functions
9. Cleanup live: mount & unmount a timer
10. Two traps: StrictMode & infinite loops
11. When NOT to use useEffect
12. Ex 1 (Easy): Tab Title with Unread Count
13. Ex 2 (Easy): Welcome Toast that Hides Itself
14. Ex 3 (Easy): Live Digital Clock
15. Ex 4 (Easy): Auto-Save Notes
16. Ex 5 (Easy): Reading Progress Bar
17. Ex 6 (Medium): Exam Countdown Timer
18. Ex 7 (Medium): Auto-Play Slider that Pauses on Hover
19. Ex 8 (Medium): Arrow-Key Game Movement
20. Ex 9 (Hard): Debounced Search
21. Ex 10 (Hard): Stopwatch with Saved Laps
22. Quick Quiz
23. Recap: What you learned

M10 Fetching Data from APIs

24. Module 10: Fetching Data from APIs
25. Where is this used in real apps?
26. What is an API? (the restaurant waiter)
27. Our classroom mock API (works offline)
28. fetch inside useEffect
29. Loading, error, success: the 3 states
30. The professional pattern: async/await + states
31. Race conditions & AbortController
32. Sending data: POST
33. TanStack Query & environment variables
34. Ex 1 (Easy): Student List from the API
35. Ex 2 (Easy): Loading Spinner
36. Ex 3 (Easy): Error Message with Retry
37. Ex 4 (Easy): User Profile by ID
38. Ex 5 (Easy): Load News on Button Click
39. Ex 6 (Medium): Weather App by City
40. Ex 7 (Medium): Product Search with Debounce + Abort
41. Ex 8 (Medium): Feedback Form (POST)
42. Ex 9 (Hard): Load-More Posts (Pagination)
43. Ex 10 (Hard): TanStack Query Product List
44. Quick Quiz
45. Recap: What you learned

M11 useRef & Working with the DOM

46. Module 11: useRef & Working with the DOM
47. Where is this used in real apps?
48. A ref is a pocket that does not re-render
49. State vs ref: see the difference
50. Refs to DOM elements
51. Rules for using refs
52. Ex 1 (Easy): Auto-Focus the Search Box
53. Ex 2 (Easy): Focus Input on "Edit" Click
54. Ex 3 (Easy): Scroll to a Section
55. Ex 4 (Easy): Count Renders with a Ref
56. Ex 5 (Easy): Uncontrolled Form with Refs
57. Ex 6 (Medium): Canvas Signature Pad
58. Ex 7 (Medium): Stopwatch with an Interval Ref
59. Ex 8 (Medium): Price Up / Down Indicator
60. Ex 9 (Hard): OTP Input Boxes with Auto-Advance
61. Ex 10 (Hard): Click-Outside to Close Dropdown
62. Quick Quiz
63. Recap: What you learned

M12 Custom Hooks

64. Module 12: Custom Hooks
65. Why custom hooks?
66. Anatomy of a custom hook
67. Each component gets its OWN state
68. Popular hook libraries (do not reinvent everything)
69. Ex 1 (Easy): useToggle
70. Ex 2 (Easy): useCounter with Step & Limits
71. Ex 3 (Easy): useDocumentTitle
72. Ex 4 (Easy): useLocalStorage
73. Ex 5 (Easy): useWindowSize
74. Ex 6 (Medium): useFetch Used by Two Components
75. Ex 7 (Medium): useDebounce for Search
76. Ex 8 (Medium): useInterval for a Live Score
77. Ex 9 (Hard): useForm with Validation Rules
78. Ex 10 (Hard): useCart with Persistence
79. Quick Quiz
80. Recap: What you learned

Part 4 Introduction

1. Part 4 cover

M13 useReducer & Context API

2. Module 13: useReducer & Context API
3. When useState gets messy
4. How a reducer works (the bank passbook)
5. useReducer live
6. Prop drilling vs Context
7. Context in 3 steps
8. Professional pattern: Provider component + custom hook
9. Ex 1 (Easy): Counter with useReducer
10. Ex 2 (Easy): Theme Context for the Whole App
11. Ex 3 (Easy): English / Hindi Language Switch
12. Ex 4 (Easy): Logged-In User Context
13. Ex 5 (Easy): Form State with a Reducer
14. Ex 6 (Medium): Todo App with useReducer
15. Ex 7 (Medium): Auth Context: Login / Logout
16. Ex 8 (Medium): Toast Notification System
17. Ex 9 (Hard): Global Cart: Context + useReducer
18. Ex 10 (Hard): Expense Tracker Store
19. Quick Quiz
20. Recap: What you learned

M14 React Router

21. Module 14: React Router
22. How routing works in a Single Page App
23. Setup: install and wrap your app
24. Your first routes (with a fake address bar)
25. Link vs <a href>
26. URL parameters with useParams
27. Nested routes & Outlet (shared layouts)
28. useNavigate, useSearchParams & protected routes
29. Ex 1 (Easy): Home & About Pages
30. Ex 2 (Easy): NavLink Active Menu
31. Ex 3 (Easy): 404 Not Found Page
32. Ex 4 (Easy): Course Detail Page (/courses/:id)
33. Ex 5 (Easy): Redirect after Form Submit
34. Ex 6 (Medium): Dashboard with Nested Routes
35. Ex 7 (Medium): Filters in the URL (useSearchParams)
36. Ex 8 (Medium): Breadcrumbs from the URL
37. Ex 9 (Hard): Protected Dashboard (Login Required)
38. Ex 10 (Hard): Mini E-commerce Store
39. Quick Quiz
40. Recap: What you learned

M15 Redux Toolkit (Global State)

41. Module 15: Redux Toolkit (Global State)
42. The Redux flow (one-way data cycle)
43. Redux Toolkit in 4 files
44. Redux Toolkit live
45. Async data: createAsyncThunk
46. Which state tool should I use?
47. Ex 1 (Easy): Counter Slice
48. Ex 2 (Easy): Theme Slice
49. Ex 3 (Easy): Todo Slice
50. Ex 4 (Easy): Derived Data with Selectors
51. Ex 5 (Easy): Two Components, One Store
52. Ex 6 (Medium): Cart Slice with Quantities & Totals
53. Ex 7 (Medium): Async Thunk: Load Products
54. Ex 8 (Medium): Auth + Cart: Multiple Slices
55. Ex 9 (Hard): Filters with Memoized Selectors
56. Ex 10 (Hard): Student Attendance App with Stats
57. Quick Quiz
58. Recap: What you learned

M16 Performance Optimization

59. Module 16: Performance Optimization
60. Why do components re-render?
61. See re-renders happen (render badges)
62. React.memo, useMemo, useCallback
63. Code splitting: lazy() + Suspense
64. Keep typing smooth: useTransition & useDeferredValue
65. Ex 1 (Easy): Render Counter: Who Re-rendered?
66. Ex 2 (Easy): React.memo Stops Extra Renders
67. Ex 3 (Easy): useMemo for a Filtered List
68. Ex 4 (Easy): useCallback + memo Child
69. Ex 5 (Easy): Lazy-Loaded Chart with Suspense
70. Ex 6 (Medium): 2,000-Row Search with useDeferredValue
71. Ex 7 (Medium): useTransition for a Slow Tab
72. Ex 8 (Medium): Prime Calculator: Measure with and without useMemo
73. Ex 9 (Hard): Virtualized 10,000-Row List
74. Ex 10 (Hard): Optimise a Dashboard (Render Chart)
75. Quick Quiz
76. Recap: What you learned

Part 5 Introduction

1. Part 5 cover

M17 Advanced Patterns & React 19

2. Module 17: Advanced Patterns & React 19
3. Where is this used in real apps?
4. Portals: render outside the parent
5. Error boundaries: stop one crash from killing the app
6. Patterns you will meet in real codebases
7. React 19 highlights
8. Server Components & Next.js (overview)
9. Ex 1 (Easy): Modal with createPortal
10. Ex 2 (Easy): Error Boundary Protects a Widget
11. Ex 3 (Easy): useId for Accessible Form Labels
12. Ex 4 (Easy): Tooltip Rendered with a Portal
13. Ex 5 (Easy): List with a renderItem Prop
14. Ex 6 (Medium): Compound Accordion
15. Ex 7 (Medium): withAuth Higher-Order Component
16. Ex 8 (Medium): Toast System: Portal + Context
17. Ex 9 (Hard): Keyboard-Friendly Select (Combobox)
18. Ex 10 (Hard): Optimistic Like with Rollback
19. Quick Quiz
20. Recap: What you learned

M18 TypeScript with React

21. Module 18: TypeScript with React
22. Why TypeScript?
23. TypeScript basics in 5 minutes
24. Typing props
25. Typing state, events & children
26. Ex 1 (Easy): Typed Greeting Component
27. Ex 2 (Easy): Optional Props with Defaults (Badge)
28. Ex 3 (Easy): Typed State: number, string[] and User | null
29. Ex 4 (Easy): Typed Event Handlers
30. Ex 5 (Easy): Order Status with a Union Type
31. Ex 6 (Medium): Typed Product List (Product[])
32. Ex 7 (Medium): Typed Reducer with Discriminated Unions
33. Ex 8 (Medium): Typed AuthContext with a Safe Hook
34. Ex 9 (Hard): Generic List<T> Component
35. Ex 10 (Hard): Typed useFetch<T> Hook
36. Quick Quiz
37. Recap: What you learned

M19 Testing React Apps

38. Module 19: Testing React Apps
39. Why write tests?
40. Setup: Vitest + React Testing Library
41. Anatomy of a test
42. Find elements the way users do
43. Red, Green, Refactor (Test-Driven Development)
44. Ex 1 (Easy): Test: Heading Renders
45. Ex 2 (Easy): Test: Counter Click
46. Ex 3 (Easy): Test: Props Change the Output
47. Ex 4 (Easy): Test: Empty State vs List
48. Ex 5 (Easy): Test: Typing in an Input
49. Ex 6 (Medium): Test: Callback Prop Was Called (vi.fn)
50. Ex 7 (Medium): Test: Mocked fetch with findBy
51. Ex 8 (Medium): Test: Form Validation Messages
52. Ex 9 (Hard): Test: Full Todo Flow
53. Ex 10 (Hard): TDD: Discount Calculator
54. Quick Quiz
55. Recap: What you learned

M20 Capstone Projects & Deployment

56. Module 20: Capstone Projects & Deployment
57. How professionals plan a project
58. Real-world folder structure (feature-based)
59. Build & deploy your app (free)
60. Before you launch: quality checklist
61. Your career roadmap & portfolio
62. Ex 1 (Easy): Digital Visiting Card Generator
63. Ex 2 (Easy): Restaurant Bill Splitter
64. Ex 3 (Easy): Unit Converter
65. Ex 4 (Easy): Notes App with localStorage
66. Ex 5 (Easy): Flashcards for Exam Revision
67. Ex 6 (Medium): Weather Dashboard (Multi-City)
68. Ex 7 (Medium): Expense Tracker with Chart
69. Ex 8 (Medium): Course Search & Favourites
70. Ex 9 (Hard): Student Result Dashboard with Charts
71. Ex 10 (Hard): Coaching Institute Mini-ERP
72. Quick Quiz
73. Recap: What you learned
74. Course complete - Certificate

Part 1 Cover & Roadmap

1. Part 1 Cover & Roadmap
2. How to Use This Part

How the Web Works & Your First Web Page

3. Module 1: How the Web Works &amp; Your First Web Page
4. What Happens When You Open a Website?
5. Reading a Web Address (URL)
6. HTML, CSS and JavaScript: Who Does What?
7. Where Is This Used on a Web Page?
8. Set Up Your Tools (Free)
9. Anatomy of an HTML Element
10. Nesting: Boxes Inside Boxes
11. The Skeleton of Every HTML Page
12. How the Browser Reads Your HTML: the DOM Tree
13. View Source & DevTools: Your X-ray Glasses
14. Live Lab: Edit and Watch the Page Change
15. My First Web Page
16. About My City: Ranchi
17. Find and Fix the Bugs
18. Using Comments in HTML
19. A Simple Notice for the Class Website
20. Recap: What You Completed in Module 1

Text, Headings & Formatting

21. Module 2: Text, Headings &amp; Formatting
22. Where Is This Used on a Web Page?
23. Six Levels of Headings: <h1> to <h6>
24. Headings Make an Outline (Like a Textbook Index)
25. Paragraphs, Line Breaks and the "Space Squeeze"
26. Formatting Tags: Make Words Stand Out
27. Quotes, Abbreviations, Code and Preformatted Text
28. HTML Entities: Typing Special Characters
29. Writing in Hindi (and Any Language)
30. Live Lab: Format a School News Story
31. School Notice Board
32. Local News Article
33. Science Formula Sheet
34. Sweet Shop Price List
35. Poem and Quote Page
36. Recap: What You Completed in Module 2

Links, Images & Media

37. Module 3: Links, Images &amp; Media
38. Where Is This Used on a Web Page?
39. Anatomy of a Link: the <a> Tag
40. Seven Types of Links You Will Use
41. Absolute vs Relative Paths: Finding Your Files
42. Adding Images with <img>
43. Which Image Format Should I Use?
44. Captions with <figure> and Clickable Images
45. Video and Audio
46. Embedding YouTube and Google Maps with <iframe>
47. Live Lab: Links + Images Together
48. A 3-Page Mini Website
49. Jharkhand Tourism Photo Gallery
50. Contact Links for a Local Shop
51. Table of Contents with Jump Links
52. Shop Location Page with Map and Video
53. Recap: What You Completed in Module 3

Lists & Tables

54. Module 4: Lists &amp; Tables
55. Where Is This Used on a Web Page?
56. Unordered Lists <ul> (Bullets) and Nesting
57. Ordered Lists <ol> (Numbers, Letters, Roman)
58. Description Lists <dl>: Terms and Meanings
59. Secret: Every Menu Is a List of Links
60. Building a Table: Rows First, Then Cells
61. Table Sections: caption, thead, tbody, tfoot
62. Merging Cells: colspan and rowspan
63. When to Use Tables (and When NOT To)
64. Live Lab: A Fee Table and a List
65. Recipe Page: Litti Chokha
66. FAQ Page with a Description List
67. Class Timetable with Lunch Break
68. Report Card with Totals
69. Train Timetable: Ranchi to Howrah
70. Recap: What You Completed in Module 4

Forms & User Input

71. Module 5: Forms &amp; User Input
72. Where Is This Used on a Web Page?
73. How a Form Sends Data
74. form + label + input: The Three Musketeers
75. One Tag, Many Types: <input type="...">
76. Radio Buttons vs Checkboxes
77. Dropdowns, Text Areas and Suggestions
78. Built-in Validation: No Code Needed
79. Grouping with <fieldset> and <legend>
80. GET vs POST: Two Ways to Send
81. Live Lab: Build an Enquiry Form
82. Coaching Admission Form
83. Login Form
84. Feedback Survey
85. Hospital Appointment Booking
86. Job Application with File Upload
87. Recap: What You Completed in Module 5

Semantic HTML & Page Structure

88. Module 6: Semantic HTML &amp; Page Structure
89. Where Is This Used on a Web Page?
90. "Div Soup" vs Semantic HTML
91. The Semantic Layout Map
92. A Complete Semantic Page
93. article, section or div? A Simple Decision Chart
94. Block vs Inline Elements, div and span
95. id and class: Names for Your Elements
96. Inside <head>: Settings, SEO and Favicon
97. Accessibility: A Website for Everyone
98. Validate Your HTML (Free Spell-check for Code)
99. Live Lab: Write a Semantic Blog Page
100. Blog Layout with Semantic Tags
101. Restaurant Homepage Structure
102. Convert Div Soup to Semantic HTML
103. SEO-Ready Head for a Coaching Institute
104. Mini Project: School Homepage (HTML Only)
105. Recap: What You Completed in Module 6

Part 1 Complete

106. Part 1 Complete

Part 2 Cover & Roadmap

1. Part 2 Cover & Roadmap
2. How to Use This Part

Introduction to CSS & Selectors

3. Module 7: Introduction to CSS &amp; Selectors
4. Where Is This Used on a Web Page?
5. CSS = Cascading Style Sheets
6. Anatomy of a CSS Rule
7. Three Ways to Add CSS
8. Why External CSS Wins: One File Styles Every Page
9. Basic Selectors: Pick Your Elements
10. Playground: Colour, Background and Text
11. DevTools Styles Panel: Edit CSS Live
12. Live Lab: Your First Stylesheet
13. Style the School Notice
14. One Stylesheet for Two Pages
15. Status Badges with Classes
16. ID vs Class: Highlight the Topper
17. Theme Headings with Group Selectors
18. Recap: What You Completed in Module 7

Colours, Units & Typography

19. Module 8: Colours, Units &amp; Typography
20. Where Is This Used on a Web Page?
21. Five Ways to Write a Colour
22. Pick a Palette and Check Contrast
23. Units Playground: px, %, rem, em, vw
24. Font Families and Google Fonts (Hindi Too!)
25. Typography Playground: Size, Weight, Spacing
26. Text Effects: Transform, Decoration, Shadow
27. Rules for Readable Text
28. Live Lab: Brand Colours and Fonts
29. Brand Palette Card for a Sweet Shop
30. Bilingual Heading with Google Fonts
31. Readable Article Typography
32. Scalable Page with rem
33. Festival Greeting Card
34. Recap: What You Completed in Module 8

The Box Model

35. Module 9: The Box Model
36. Where Is This Used on a Web Page?
37. Every Element Is a Box with 4 Layers
38. Box Model Playground: Drag the Sliders
39. Writing margin and padding: 1, 2, 3 or 4 Values
40. box-sizing: Why 200px Becomes 252px
41. Centring a Box: max-width + margin: auto
42. Margin Collapse: 30 + 20 = 30?!
43. Borders, Rounded Corners and Outline
44. overflow: When Content Is Too Big for the Box
45. Live Lab: Build a Profile Card
46. Student Profile Card
47. Centred Page Container
48. Pricing Box
49. Fix the Overflowing Comment Box
50. Equal-Size Buttons with box-sizing
51. Recap: What You Completed in Module 9

Backgrounds, Gradients & Effects

52. Module 10: Backgrounds, Gradients &amp; Effects
53. Where Is This Used on a Web Page?
54. Background Image Playground
55. Readable Text on Photos: the Dark Overlay Trick
56. Gradient Playground: linear, radial, conic
57. box-shadow: Make Boxes Float
58. opacity and filter: Photo Effects in One Line
59. object-fit: Fit Any Photo into a Fixed Box
60. Live Lab: Festival Offer Banner
61. Hero Banner with Background Image
62. Gradient Buttons
63. Circular Team Photos with object-fit
64. Card Elevation with Shadows
65. Festival Offer Banner
66. Recap: What You Completed in Module 10

Advanced Selectors & the Cascade

67. Module 11: Advanced Selectors &amp; the Cascade
68. Where Is This Used on a Web Page?
69. Combinators: Family Relationships
70. Attribute Selectors: Select by Attribute Values
71. Pseudo-classes: Styles for STATES
72. Structural Pseudo-classes: Pick by Position
73. Pseudo-elements: Style a PART of an Element
74. The Cascade: How CSS Decides Who Wins
75. Specificity Calculator: Type Any Selector
76. Inheritance: What Children Get from Parents
77. Live Lab: Hover Menus and Striped Lists
78. Zebra-Striped Results Table
79. Interactive Navigation Menu
80. Form Focus and Error States
81. Required Asterisk with ::after
82. Magazine Drop Cap and Pull Quote
83. Recap: What You Completed in Module 11

Display, Position & Z-index

84. Module 12: Display, Position &amp; Z-index
85. Where Is This Used on a Web Page?
86. display: How a Box Sits in the Flow
87. Three Ways to Hide: Which One When?
88. position Playground: Move the Orange Box
89. The Golden Pair: relative Parent + absolute Child
90. z-index: Who Is on Top?
91. float: Wrap Text Around an Image (Old but Useful)
92. Four Real-World Position Patterns in One Page
93. Live Lab: Product Card with a Ribbon
94. Cart Icon with Notification Badge
95. Sticky Header
96. Fixed WhatsApp Chat Button
97. Photo Caption Overlay
98. Dropdown Menu on Hover
99. Recap: What You Completed in Module 12

Part 2 Complete

100. Part 2 Complete

Part 3 Cover & Roadmap

1. Part 3 Cover & Roadmap
2. How to Use This Part

Flexbox

3. Module 13: Flexbox
4. Where Is This Used on a Web Page?
5. One Line of CSS That Changed Web Layout
6. Container, Items and the Two Axes
7. Flexbox Playground: Click and Watch
8. justify-content at a Glance (Main Axis)
9. align-items at a Glance (Cross Axis)
10. flex-wrap + gap: Cards That Fit Any Screen
11. flex-grow, flex-shrink, flex-basis (Item B)
12. Three Flexbox Patterns You Will Use Daily
13. Live Lab: Header + Centred Hero
14. Navbar: Logo Left, Links Right
15. Perfectly Centred Hero
16. Product Cards Row with Wrap
17. Three-Column Footer
18. Comment / Chat Layout (Media Object)
19. Recap: What You Completed in Module 13

CSS Grid

20. Module 14: CSS Grid
21. Where Is This Used on a Web Page?
22. Flexbox vs Grid: Which One?
23. Grid Playground: Columns and Gaps
24. repeat(), minmax() and the Magic auto-fit Line
25. Placing Items: Lines and span
26. grid-template-areas: Draw Your Layout with Words
27. Changing the Map for Mobile (Preview of Module 15)
28. Live Lab: Dashboard Tiles
29. Photo Gallery Grid
30. School Dashboard with Named Areas
31. Responsive Course Cards with auto-fit
32. Magazine Layout with span
33. Calendar Month View
34. Recap: What You Completed in Module 14

Responsive Design & Media Queries

35. Module 15: Responsive Design &amp; Media Queries
36. Where Is This Used on a Web Page?
37. Your Visitors Use Many Screen Sizes
38. The Viewport Meta Tag (Never Forget It!)
39. Fluid Layouts and Flexible Images
40. Media Queries: CSS That Depends on Screen Width
41. Breakpoints and Mobile-First Thinking
42. A Mobile Menu Without JavaScript (Checkbox Trick)
43. Responsive Images: srcset and picture
44. Test Like a Pro: DevTools Device Mode
45. Live Lab: Mobile-First Columns
46. Three Columns to One Column
47. Collapsible Mobile Menu
48. Responsive Hero Text
49. Responsive Table (Scroll on Mobile)
50. Mobile-First Gym Landing Page
51. Recap: What You Completed in Module 15

CSS Variables, Dark Mode & Functions

52. Module 16: CSS Variables, Dark Mode &amp; Functions
53. Where Is This Used on a Web Page?
54. CSS Variables: Define Once, Use Everywhere
55. Variable Rules: :root, Fallbacks, Local Overrides
56. Dark Mode with Variables (Toggle in the Preview!)
57. Maths in CSS: calc(), min(), max(), clamp()
58. aspect-ratio and Modern Selectors :is() / :where()
59. Live Lab: Theme + Dark Mode + clamp()
60. Brand Theme with Variables
61. Dark Mode Toggle (No JavaScript)
62. Fluid Typography with clamp()
63. Sidebar Layout with calc()
64. Video Thumbnails with aspect-ratio
65. Recap: What You Completed in Module 16

Transitions, Transforms & Animations

66. Module 17: Transitions, Transforms &amp; Animations
67. Where Is This Used on a Web Page?
68. transition: From Jump to Smooth
69. Timing Functions Race: Who Accelerates How?
70. transform Playground: Move, Turn, Grow, Tilt
71. 3D Flip Cards (Hover the Cards)
72. @keyframes: Animations That Run by Themselves
73. Animation Playground: Speed, Direction, Repeat
74. Smooth, Fast and Kind Animations
75. Live Lab: An Animated Tour Card
76. Hover Button Effects
77. Flip Flash-Cards for Revision
78. Loading Spinner
79. Animated Skill / Progress Bars
80. News Ticker for School Notices
81. Recap: What You Completed in Module 17

Part 3 Complete

82. Part 3 Complete

Part 4 Cover & Roadmap

1. Part 4 Cover & Roadmap
2. How to Use This Part

Pure-CSS UI Components

3. Module 18: Pure-CSS UI Components
4. Where Is This Used on a Web Page?
5. A Button System: Base + Variants + Sizes
6. Alerts, Badges, Breadcrumbs and Pagination
7. Accordion: <details> and <summary> (Built In!)
8. Modal Popup with :target
9. Tabs with Radio Buttons and the ~ Selector
10. Tooltips with attr() and a Toggle Switch
11. Live Lab: Combine Components into a Card
12. FAQ Accordion
13. Modal Popup with :target
14. Product Tabs
15. Tooltips for a Government Form
16. Fully Styled Contact Form
17. Recap: What You Completed in Module 18

Professional Workflow & Deployment

18. Module 19: Professional Workflow &amp; Deployment
19. Where Is This Used on a Web Page?
20. Project Folder Structure and Naming Rules
21. Start Every Project with a Reset and an Order
22. BEM: Block__Element--Modifier Class Names
23. Debugging Layouts Like a Detective
24. Accessibility, SEO and Speed: the Lighthouse Report
25. SEO and Open Graph: Look Good on Google and WhatsApp
26. Git and GitHub in 5 Minutes
27. Put Your Website Online for Free
28. Live Lab: A Clean, BEM-Named Component
29. Refactor Messy CSS with BEM
30. Fix the Accessibility Problems
31. SEO and Share-Ready Head
32. Debug the Broken Layout
33. Prepare a Site for Deployment
34. Recap: What You Completed in Module 19

Capstone Projects

35. Module 20: Capstone Projects
36. Where Is This Used on a Web Page?
37. The 6-Step Workflow for Every Project
38. Personal Portfolio Website
39. Project 1: Personal Portfolio
40. Cafe Landing Page
41. Project 2: Chai Point Cafe Landing Page
42. School Website Homepage
43. Project 3: Ranchi Public School Homepage
44. Handicraft Store Product Page
45. Project 4: Jharkhand Handicrafts Store
46. Explore Jharkhand Tourism Website
47. Project 5: Explore Jharkhand
48. You Are Now an HTML + CSS Developer!
49. Recap: What You Completed in Module 20

Part 4 Complete

50. Part 4 Complete

Part 1 Cover & Roadmap

1. Part 1 Cover & Roadmap
2. How to Use This Part

What Is JavaScript & Your First Program

3. Module 1: What Is JavaScript &amp; Your First Program
4. Where Is This Used in Real Websites and Apps?
5. HTML Shows, CSS Styles, JavaScript ACTS
6. JavaScript Runs Almost Everywhere
7. Where to Write JavaScript: the <script> Tag
8. Three Ways to Show Output
9. Meet the Console: Your JavaScript Playground
10. Statements, Comments and Case
11. Watch JavaScript Run Line by Line
12. Errors Are Your Friends: Read the Red Message
13. Live Lab: Your First JavaScript
14. Welcome Message on a Coaching Website
15. Print a Bus Ticket in the Console
16. Find and Fix the Errors
17. Change Page Text with JavaScript
18. A "Show Today's Date" Button
19. Recap: What You Completed in Module 1

Variables, Data Types & Operators

20. Module 2: Variables, Data Types &amp; Operators
21. Where Is This Used in Real Websites and Apps?
22. Variables: Labelled Boxes for Your Data
23. let vs const: Step Through It
24. Naming Variables: Rules and Good Habits
25. Data Types: What Kind of Value Is It?
26. Maths Operators: Your App Is a Calculator
27. Shortcuts: +=, -=, ++ and -- (Wallet Example)
28. Comparing Values: == vs ===
29. The "5" + 2 = "52" Trap (and How to Fix It)
30. Live Lab: A Quick Bill Calculator
31. Food Order Bill with GST
32. Student Profile in Variables
33. Temperature Converter
34. Mobile Recharge Wallet
35. Simple Interest Calculator Page
36. Recap: What You Completed in Module 2

Strings, Numbers & Math

37. Module 3: Strings, Numbers &amp; Math
38. Where Is This Used in Real Websites and Apps?
39. Strings Are a Row of Characters
40. Template Literals: Build Messages Easily
41. String Methods You Will Use Every Day
42. Real Use: A Case-Insensitive Search Check
43. Formatting Numbers: Decimals and Indian Commas
44. The Math Object: Rounding, Max, Min, Random
45. How a Random Number Between 1 and 6 Is Made
46. Live Lab: A Username Maker
47. Personalised Order Message
48. Clean Up a Messy Name and Mobile
49. Price Formatter for a Shop
50. OTP Generator
51. Marks Statistics Card
52. Recap: What You Completed in Module 3

Decisions: if, else, switch

53. Module 4: Decisions: if, else, switch
54. Where Is This Used in Real Websites and Apps?
55. if ... else: Two Roads
56. else if Chains: Step Through a Grade Calculator
57. Logical Operators: AND, OR, NOT
58. Truthy and Falsy: What Counts as "Yes"?
59. The Ternary Operator: if-else in One Line
60. switch: Many Fixed Choices
61. Live Lab: A Result Checker
62. Grade Calculator
63. Simple Login Check
64. Delivery Charge and Discount Rules
65. Traffic Light Controller
66. Greeting by Time of Day + Shop Status
67. Recap: What You Completed in Module 4

Loops

68. Module 5: Loops
69. Where Is This Used in Real Websites and Apps?
70. Why Loops? Do Not Copy-Paste 100 Times!
71. The for Loop: Start, Check, Run, Step
72. Step Through a for Loop
73. for Loop Patterns: Count Up, Down, by Steps
74. while and do...while: Repeat Until Something Happens
75. break and continue: Exit Early or Skip One
76. Nested Loops: A Loop Inside a Loop
77. for...of: The Easy Way Through a List
78. Live Lab: Multiplication Table Generator
79. Multiplication Table on a Page
80. Sum and Average of Marks
81. Number Guessing Game
82. Star and Number Patterns
83. Bus Seat Layout Generator
84. Recap: What You Completed in Module 5

Functions & Scope

85. Module 6: Functions &amp; Scope
86. Where Is This Used in Real Websites and Apps?
87. A Function Is a Machine: Input → Work → Output
88. Declaring and Calling a Function
89. return: Giving a Result Back
90. Many Parameters and Default Values
91. Function Expressions and Arrow Functions
92. Scope: Where Can a Variable Be Seen?
93. The Call Stack: Functions Calling Functions
94. Live Lab: Small Functions Working Together
95. GST and Discount Helper Functions
96. EMI Calculator
97. Age Calculator and Voting Eligibility
98. BMI Checker with a Button
99. Reusable Validation Functions
100. Recap: What You Completed in Module 6

Part 1 Complete

101. Part 1 Complete

Part 2 Cover & Roadmap

1. Part 2 Cover & Roadmap
2. How to Use This Part

Arrays & Array Methods

3. Module 7: Arrays &amp; Array Methods
4. Where Is This Used in Real Websites and Apps?
5. An Array Is a List in One Variable
6. Adding and Removing Items
7. Searching an Array: includes, indexOf, find
8. forEach: Do Something With Each Item
9. Watch map, filter, find, reduce and sort Work
10. map, filter and reduce in Real Code
11. Sorting Correctly (Numbers Are Tricky!)
12. join, slice, spread, includes: Handy Tools
13. Live Lab: Analyse a List of Marks
14. Class Marksheet Summary
15. To-Do List Array Operations
16. Product Price Filter
17. Shopping Cart Total
18. Leaderboard: Top 3 Quiz Scores
19. Recap: What You Completed in Module 7

Objects & JSON

20. Module 8: Objects &amp; JSON
21. Where Is This Used in Real Websites and Apps?
22. An Object Describes ONE Thing with Properties
23. Add, Change and Delete Properties
24. Methods and this: Objects That Can Do Things
25. Looping Through an Object: keys, values, entries
26. Arrays of Objects: The Shape of Real App Data
27. Destructuring and Spread: Modern Shortcuts
28. JSON: How Apps Send and Save Data
29. Live Lab: Render a Card from an Object
30. Student Profile Card from an Object
31. Product Catalogue from an Array of Objects
32. Bank Account Object with Methods
33. Group Students by City
34. Settings Saved as JSON
35. Recap: What You Completed in Module 8

The DOM: Select & Change the Page

36. Module 9: The DOM: Select &amp; Change the Page
37. Where Is This Used in Real Websites and Apps?
38. DOM = Document Object Model: the Page as a Tree
39. Selecting Elements: Find Before You Change
40. Which Selector Method Should I Use?
41. Changing Text, HTML, Styles and Classes
42. classList: The Best Way to Change Styles
43. Parents, Children and Siblings
44. Live Lab: Change the Page with JS
45. Dark Mode Switch
46. Image Gallery Viewer
47. Read More / Read Less Toggle
48. Live Price Update with Quantity
49. Highlight Search Matches in a Table
50. Recap: What You Completed in Module 9

Events: Make Pages Interactive

51. Module 10: Events: Make Pages Interactive
52. Where Is This Used in Real Websites and Apps?
53. Events: The Page Listens, Your Code Responds
54. Your First Event Listener: a Like Button
55. Event Types Playground: Watch the Console
56. The Event Object: Details About What Happened
57. Event Bubbling: Events Travel Upwards
58. Event Delegation: One Listener for Many Buttons
59. preventDefault: Stop the Browser's Default Action
60. Live Lab: A Quantity Stepper
61. Character Counter for a Feedback Box
62. Tabs with JavaScript
63. FAQ Accordion (Only One Open)
64. Keyboard Shortcuts and Arrow-Key Movement
65. Back-to-Top Button on Scroll
66. Recap: What You Completed in Module 10

Forms & Validation with JS

67. Module 11: Forms &amp; Validation with JS
68. Where Is This Used in Real Websites and Apps?
69. Reading Every Kind of Form Field
70. The Validation Flow Every Form Uses
71. Validate on Submit and Show Errors Under Fields
72. Regular Expressions: Patterns for Text
73. Live Validation While Typing: Password Strength
74. Live Lab: PIN Code Delivery Checker
75. Sign-Up Form with Error Messages
76. Live Email Availability Check
77. Password Strength Meter
78. Loan Eligibility Form
79. Multi-Step Admission Form
80. Recap: What You Completed in Module 11

Creating Elements & Rendering Lists

81. Module 12: Creating Elements &amp; Rendering Lists
82. Where Is This Used in Real Websites and Apps?
83. Create, Add and Remove Elements
84. createElement vs innerHTML: Which One?
85. The Render Pattern: Data First, Then Draw
86. The Render Pattern in Action: a Mini To-Do
87. Search, Filter and Sort a Product Grid
88. Live Lab: A Chat Window
89. Dynamic To-Do List
90. Render a Results Table from Data
91. Product Grid with Category Buttons
92. Searchable Contact Book
93. Mini Cart: Add to Cart from a Product List
94. Recap: What You Completed in Module 12

Part 2 Complete

95. Part 2 Complete

Part 3 Cover & Roadmap

1. Part 3 Cover & Roadmap
2. How to Use This Part

Timers, Dates & Animation

3. Module 13: Timers, Dates &amp; Animation
4. Where Is This Used in Real Websites and Apps?
5. setTimeout: Run Code After a Delay
6. setInterval and clearInterval: Repeat and Stop
7. The Date Object: Today, Time and Indian Formats
8. Date Maths: Days Left, Age, "Posted 5 min ago"
9. requestAnimationFrame: Smooth 60 fps Animation
10. Live Lab: A Digital Clock
11. Digital Clock with Greeting
12. Exam Countdown Timer
13. Auto-Playing Image Slider
14. Stopwatch with Laps
15. OTP Resend Timer
16. Recap: What You Completed in Module 13

localStorage: Apps That Remember

17. Module 14: localStorage: Apps That Remember
18. Where Is This Used in Real Websites and Apps?
19. Variables Forget, localStorage Remembers
20. Saving Arrays and Objects with JSON
21. Remember the Theme and Count Visits
22. localStorage vs sessionStorage vs Cookies
23. Load Data Safely: Defaults and try...catch
24. Live Lab: An Auto-Saving Notepad
25. Remembered Language Choice
26. Notes App That Survives Refresh
27. Saved Shopping Cart
28. Form Draft Auto-Save
29. High Score for a Reaction Game
30. Recap: What You Completed in Module 14

Async JS: Callbacks, Promises, async/await

31. Module 15: Async JS: Callbacks, Promises, async/await
32. Where Is This Used in Real Websites and Apps?
33. Synchronous vs Asynchronous: the Chai Shop Story
34. The Event Loop: How JS Does Many Things
35. Step Through the Event Loop
36. Callbacks and "Callback Hell"
37. A Promise: "I Will Give You the Result Later"
38. Promise Chaining: No More Pyramid
39. async / await: Async Code That Reads Like Normal Code
40. Promise.all: Do Several Things at the Same Time
41. Live Lab: Live Order Tracking with await
42. A delay() Helper and a Countdown
43. Simulated Payment with Success / Failure
44. Callbacks to Promises Refactor
45. Loading Spinner While "Data" Loads
46. Parallel Loading with Promise.all
47. Recap: What You Completed in Module 15

Fetch & APIs

48. Module 16: Fetch &amp; APIs
49. Where Is This Used in Real Websites and Apps?
50. How fetch Talks to a Server
51. Your First fetch: Load a List of Students
52. Status Codes and Error Handling
53. The 4 States Every Data Screen Needs
54. Sending Data with POST
55. Live Lab: Load Posts from the API
56. Weather App
57. Student List from the Server
58. Product Search with Debounce
59. Feedback Form that POSTs JSON
60. Quiz Loaded from an API
61. Recap: What You Completed in Module 16

Modern ES6+ & Error Handling

62. Module 17: Modern ES6+ &amp; Error Handling
63. Where Is This Used in Real Websites and Apps?
64. Old JavaScript vs Modern JavaScript
65. Spread ... and Rest ...: Same Dots, Two Jobs
66. Optional Chaining ?. and Nullish Coalescing ??
67. Short Object Syntax, Map, Set and Modern Helpers
68. try / catch / finally: Errors Without Crashing
69. throw and Custom Errors: Your Own Rules
70. Live Lab: Safe Data with ?. ?? and Destructuring
71. Settings Merger with Spread and Defaults
72. Safe API Data Reader
73. Crash-Proof Calculator
74. Unique Visitors with Set, Stock with Map
75. Global Error Catcher with a Friendly Banner
76. Recap: What You Completed in Module 17

Part 3 Complete

77. Part 3 Complete

Part 4 Cover & Roadmap

1. Part 4 Cover & Roadmap
2. How to Use This Part

Classes, OOP & Modules

3. Module 18: Classes, OOP &amp; Modules
4. Where Is This Used in Real Websites and Apps?
5. One Blueprint, Many Objects
6. class, constructor, this and Methods
7. Watch new and this Build an Object
8. Getters, Setters, static and #private Fields
9. extends and super: Build on an Existing Class
10. The 4 Pillars of OOP in Simple Words
11. Classes Are Built on Prototypes
12. Modules: Split Your App into Files
13. Named vs Default Exports
14. Live Lab: A Cart Class Behind a Real Page
15. Bank Account with Private Balance
16. Report Cards with a Student Class
17. Ride Fare Calculator (Polymorphism)
18. Reusable Toast Notification Component
19. Library System with Inheritance
20. Recap: What You Completed in Module 18

Debugging, Browser APIs & Best Practices

21. Module 19: Debugging, Browser APIs &amp; Best Practices
22. Where Is This Used in Real Websites and Apps?
23. Every Bug Is One of These Three
24. Browser DevTools: Your Debugging Toolbox
25. More Than console.log
26. Step Through to Find a Logic Bug
27. The 6-Step Debugging Recipe
28. Geolocation API: "Find Places Near Me"
29. Clipboard API: One-Tap Copy Buttons
30. Canvas API: Draw Charts, Games and Graphics with Code
31. Speech and Other Useful Browser APIs
32. Best Practices: Code Others Can Read
33. Security and Performance Checklist
34. Live Lab: A Drawing / Signature Pad
35. Bug Hunt: Fix 4 Bugs
36. Copy Coupon Code Button
37. Nearest Tourist Spot Finder
38. Animated Pie Chart on Canvas
39. Scroll Progress Bar and Reveal Animations
40. Recap: What You Completed in Module 19

Capstone Apps

41. Module 20: Capstone Apps
42. Where Is This Used in Real Websites and Apps?
43. The App Loop: State, Render, Event, Save
44. How Your Apps Will Be Marked
45. Smart To-Do List
46. App 1: Smart To-Do List
47. Timed Quiz App
48. App 2: Timed Quiz App
49. Expense Tracker with Chart
50. App 3: Expense Tracker with Chart
51. Jharkhand Weather App
52. App 4: Jharkhand Weather App
53. Shopping Cart for a Handicraft Store
54. App 5: Handicraft Store Shopping Cart
55. Publish Your Apps and Build a Portfolio
56. You Are Now a JavaScript Developer!
57. Recap: What You Completed in Module 20

Part 4 Complete

58. Part 4 Complete

1. Title
2. Agenda

Part 1

3. Part 1
4. Definition
5. Three skill areas
6. Everyday examples
7. Lifecycle
8. AI, ML and roles
9. Four types of analytics

Part 2

10. Part 2
11. Course roadmap
12. Module details
13. Time allocation
14. Tools
15. Projects

Part 3

16. Part 3
17. Job growth
18. Reasons to start
19. Career path
20. Myths and facts
21. 30-day starter plan

Thank you

22. Thank you

1. Introduction to GIS & Geospatial Technology
2. What you will learn today
3. Definition of GIS
4. A paper map answers “where?”. GIS answers “why here?” and “what if?”
5. GIS vs Digital Maps
6. GIS vs CAD
7. GIS vs GPS
8. GIS vs Remote Sensing
9. Five parts of every GIS
10. Hardware: the body of GIS
11. Software: the brain of GIS
12. Data: the fuel of GIS
13. People and Methods complete the system
14. Where is GIS used in the real world?
15. Cities, roads and infrastructure
16. Land, farms, forests and water
17. People, risk and smart systems
18. Four ideas behind every GIS layer
19. Location — how we pin the world
20. Geometry, attributes & relationships
21. Two big families: Vector and Raster
22. Point, Line, Polygon
23. Same landscape, three layers
24. Grids that paint the Earth
25. What the numbers mean
26. Vector or Raster? Decision table
27. Create a simple conceptual map
28. Conceptual map of “Kanke Block” (invented teaching data)
29. Now use the map like a GIS (on paper first)
30. Tiny databases behind the drawing
31. How you would build this in QGIS later
32. Can you answer these?
33. Carry these sentences out of class
34. You now have the GIS glasses.

Course Cover

1. Course Cover

Module 2: ArcGIS Pro Fundamentals

2. Module 2: ArcGIS Pro Fundamentals
3. Your Learning Journey Today
4. What is ArcGIS Pro?
5. ArcGIS Pro vs ArcMap
6. ArcGIS Pro Project Structure
7. Installation in Six Steps
8. Licensing Concepts: Who, Where and How Much
9. Interface Tour (click to explore)
10. The Ribbon: Tabs, Groups and Contextual Tabs
11. Contents Pane vs Catalog Pane
12. Map View vs Layout View
13. Geoprocessing Pane and Attribute Table
14. Start Page, Templates and New Project
15. Folders, Maps, Scenes, Layouts, Databases, Toolboxes
16. Maps (2D) and Scenes (3D)
17. Add, Remove, Show/Hide and Reorder (try it)
18. Layer Ordering: Who Sits on Top?
19. Layer Properties
20. Metadata: The Label on the Data Box
21. My First GIS Project - Ranchi City Map
22. Step-by-Step Builder: Click "Next step"
23. The Finished Layout
24. Name the Interface Parts
25. Plan a New Project
26. Fix the Drawing Order
27. Set Layer Properties
28. Write Metadata for Landmarks

Module 2 Summary and Quiz

29. Module 2 Summary and Quiz

Thank You!

30. Thank You!

Course Cover

1. Course Cover

Module 3: Geographic Data & Data Sources

2. Module 3: Geographic Data & Data Sources
3. From Data Source to GIS Database
4. Three Kinds of Geographic Data
5. Points, Lines and Polygons (click to explore)
6. Shapefile: Many Files Make One Layer
7. GeoJSON: Geography Written as Text
8. KML / KMZ: The Google Earth Formats
9. Feature Class and Geodatabase
10. Vector Formats at a Glance
11. Rasters are Grids of Pixels (drag the slider)
12. TIFF / GeoTIFF and IMG
13. DEM: Elevation as a Raster
14. Satellite Imagery: Bands and Colour Combinations
15. CSV, Excel and Database Tables
16. Joining a Table to a Layer by a Common Key
17. Five Families of Data Sources
18. Trusted Portals Every GIS Beginner Should Know
19. Choosing and Downloading Data Responsibly
20. Five Formats, One Destination
21. CSV → GIS: the Delimited Text Wizard
22. Excel, KML, GeoJSON and Shapefile → GIS
23. Import Problems and Quick Fixes
24. Build a Basic District GIS Database
25. Interactive District Map (click and toggle)
26. Step by Step: Import, Join, Save
27. Sort the Files
28. Fix and Import a Health Centre CSV
29. Write Your Own GeoJSON
30. Match the Need to the Source
31. Join a Messy Population Table

Module 3 Summary and Quiz

32. Module 3 Summary and Quiz

Thank You!

33. Thank You!

Course Cover & Roadmap

1. Course Cover & Roadmap
2. How This Course Works

Module 1: Getting Started with QGIS

3. Module 1: Getting Started with QGIS

Getting Started with QGIS

4. What is QGIS and Why Learn It?
5. LTR vs Latest, and How to Install
6. QGIS Interface Tour (click to explore)
7. Moving Around and Extending QGIS
8. Install and Save Your First Project
9. Name the Panels
10. Add an OpenStreetMap Basemap
11. Spatial Bookmarks
12. Customise the Workspace

Module 2: Loading Data and the Layers Panel

13. Module 2: Loading Data and the Layers Panel

Loading Data and the Layers Panel

14. One Window to Load Everything (click tabs)
15. Web Basemaps and the Tile Pyramid
16. Layers Panel and Layer Properties
17. Organise Your Data in a GeoPackage
18. Villages from CSV
19. Mixed Formats
20. Add a Satellite Basemap
21. Build ranchi.gpkg
22. Fix the Invisible Layers

Module 3: Coordinate Reference Systems

23. Module 3: Coordinate Reference Systems

Coordinate Reference Systems

24. Geographic vs Projected Coordinate Systems
25. Map Projections and Distortion (try it)
26. UTM Zones Across India and Key EPSG Codes
27. Set Layer CRS vs Reproject Layer
28. Find the UTM Zone
29. Identify Layer CRS
30. Measure Road Length in km
31. The Layer in the Ocean
32. Degrees vs Metres Area

Module 4: Symbology and Labels

33. Module 4: Symbology and Labels

Symbology and Labels

34. Style the Same Villages Four Ways
35. Colour Ramps and Classification Methods
36. Labels and All Renderer Types (try it)
37. Schools by Type (Categorized)
38. Population Choropleth (Graduated)
39. Readable Village Labels
40. Road Hierarchy (Rule-based)
41. Heatmap and Saved Style

Module 5: Attribute Tables, Queries and Field Calculator

42. Module 5: Attribute Tables, Queries and Field Calculator

Attribute Tables, Queries and Field Calculator

43. Select Features by Expression (try it)
44. Field Calculator: Create New Columns (try it)
45. Joining Tables and Summarising Data
46. Find Large Villages
47. Population Density
48. Classify with CASE
49. Join Literacy Data
50. Category Statistics

Module 6: Digitizing, Editing and Georeferencing

51. Module 6: Digitizing, Editing and Georeferencing

Digitizing, Editing and Georeferencing

52. Create a Layer and the Editing Workflow
53. Digitize with Snapping (try it: click on the map)
54. Clean Topology and Georeferencing Old Maps
55. Create a Wells Layer
56. Digitize a Ward Boundary
57. Split and Merge
58. Fix Invalid Geometries
59. Georeference a Scanned Map

Module 7: Vector Geoprocessing

60. Module 7: Vector Geoprocessing

Vector Geoprocessing

61. Six Essential Geoprocessing Tools
62. Buffer Analysis: Which Villages are Near a School? (drag)
63. Spatial Joins, Counting and the Model Designer
64. 3 km School Buffers
65. Clip Roads to the District
66. Dissolve Wards into Zones
67. Schools per Ward
68. Villages Far from Schools (Model)

Module 8: Raster Analysis Basics

69. Module 8: Raster Analysis Basics

Raster Analysis Basics

70. Terrain Analysis from a DEM (try it)
71. Raster Calculator and NDVI (try it)
72. Clip, Reclassify and Zonal Statistics
73. Hillshaded Relief Map
74. Contours Every 20 m
75. Find Steep Land
76. NDVI from Sentinel-2
77. Mean Elevation per Block

Module 9: Print Layout and Map Export

78. Module 9: Print Layout and Map Export

Print Layout and Map Export

79. Build a Complete Map Layout (tick the elements)
80. Exporting Maps and Atlas Map Series
81. Good Map Design Checklist
82. A4 District Map
83. Inset Location Map
84. Ward Atlas
85. Images for WhatsApp and Report
86. Publish a Web Map

Module 9: Print Layout and Map Export

87. Course Summary and Capstone Project

Thank You!

88. Thank You!

1. Excel from Zero
2. Course map
3. How each module works

Module 1: Understanding Excel from Zero

4. Module 1: Understanding Excel from Zero
5. 1.1 What is Microsoft Excel?
6. 1.1 Why Excel is used
7. 1.1 Excel compared with other tools
8. 1.1 Where Excel is used
9. 1.2 Excel terminology
10. 1.2 Workbook, worksheet and sheet tab
11. 1.2 Row, column, cell, address and range
12. 1.2 Formula, function, table and chart
13. 1.2 Ribbon, formula bar, name box, status bar
14. 1.3 Opening Excel
15. 1.3 The Excel start screen
16. 1.4 Understanding the Excel screen

Module 1: 5 practical examples

17. Module 1: 5 practical examples

Module 1: recap and time plan

18. Module 1: recap and time plan

Module 2: Workbook and Worksheet Management

19. Module 2: Workbook and Worksheet Management
20. 2.1 Creating a workbook
21. 2.2 Save and Save As
22. 2.2 File location, name and type
23. 2.2 The .xlsx file extension
24. 2.3 Opening and 2.4 closing a workbook
25. 2.5 Creating worksheets
26. 2.5 Sheet tabs in action
27. 2.6 Working with multiple sheets

Module 2: recap and time plan

28. Module 2: recap and time plan

Module 2: 5 practical examples

29. Module 2: 5 practical examples
30. Practical project: School Student Management Workbook

Module 3: Cells, Rows and Columns

31. Module 3: Cells, Rows and Columns
32. 3.1 Understanding cells
33. 3.2 Selecting cells
34. 3.3 Entering data
35. 3.3 Move and enter faster
36. 3.4 Editing data
37. 3.5 Rows
38. 3.6 Columns

Module 3: recap and time plan

39. Module 3: recap and time plan

Module 3: 5 practical examples

40. Module 3: 5 practical examples
41. Practical project: Employee Register

Module 4: Data Entry and Editing

42. Module 4: Data Entry and Editing
43. Data entry theory: what and why
44. Good data-entry practices
45. Enter, edit and clear data
46. Copy, paste and cut
47. Undo and redo
48. AutoFill

Module 4: recap and time plan

49. Module 4: recap and time plan

Module 4: 5 practical examples

50. Module 4: 5 practical examples
51. Practical project: 100-Student Data Entry Sheet

Module 5: Excel Formatting for Beginners

52. Module 5: Excel Formatting for Beginners
53. 5.1 Raw Data vs Professional Data
54. 5.1 6 Reasons Every Office Worker Formats Data
55. 5.2 The Font Group: Your Text Toolbox
56. 5.2 Font, Size, Bold, Italic, Underline, Colour
57. 5.3 Fill Colour, Borders, Alignment, Wrap Text, Merge
58. 5.3 Alignment, Wrap Text and Merge & Center Up Close
59. 5.4 Number, Currency, Percentage, Date, Time, Decimals
60. 5.4 Typing Numbers the Right Way
61. Practical: Convert a Plain Employee Register into a Professional HR Register
62. Practical - Result: The Finished HR Register
63. Practice Example 1 of 5: Student Marks Sheet
64. Practice Example 2 of 5: Stationery Shop Price List
65. Practice Example 3 of 5: Monthly Attendance Sheet
66. Practice Example 4 of 5: Reception Visitor Register
67. Practice Example 5 of 5: Monthly Fee Collection Report

Module 6: Basic Excel Formulas

68. Module 6: Basic Excel Formulas
69. Before we start: Formulas: Go Slow, Build Strong
70. 6.1 Your First Formula: =10+20
71. 6.1 Practise in the Formula Tester
72. 6.2 Using Cell Addresses: =A1+B1
73. 6.2 Why References Beat Typing Numbers
74. 6.3 The 5 Operators (+ one bonus)
75. 6.4 =10+5*2 versus =(10+5)*2
76. 6.4 Practice: Who Goes First?
77. 6.5 =B2+C2, =B2-C2, =B2*C2, =B2/C2
78. 6.5 Beginner Errors and How to Fix Them
79. Practical: Monthly Household Expense Calculator
80. Practice Example 1 of 5: Kirana Store Bill
81. Practice Example 2 of 5: Salary Calculation
82. Practice Example 3 of 5: Report Card Percentage
83. Practice Example 4 of 5: Bike Trip Petrol Cost
84. Practice Example 5 of 5: Mobile Shop Profit and Loss

Module 7: Essential Excel Functions

85. Module 7: Essential Excel Functions
86. Introduction: Formula vs Function: Work Smarter
87. Interactive: Function Explorer: One Data Set, Six Functions
88. Function: SUM: SUM: Meaning → Syntax → Example → Practice
89. Function: AVERAGE: AVERAGE: Meaning → Syntax → Example → Practice
90. Function: MIN: MIN: Meaning → Syntax → Example → Practice
91. Function: MAX: MAX: Meaning → Syntax → Example → Practice
92. Function: COUNT: COUNT: Meaning → Syntax → Example → Practice
93. Function: COUNTA: COUNTA: Meaning → Syntax → Example → Practice
94. Compare: COUNT vs COUNTA and Quick Summary
95. Practical: Monthly Sales Analysis
96. Practical: Monthly Sales Analysis: Steps and Questions
97. Practice Example 1 of 5: Class Test Marks
98. Practice Example 2 of 5: Showroom Daily Footfall
99. Practice Example 3 of 5: Training Assessment Attendance
100. Practice Example 4 of 5: Office Electricity Bills
101. Practice Example 5 of 5: Petty Cash Register

Module 8: Relative and Absolute Cell References

102. Module 8: Relative and Absolute Cell References
103. The Big Idea: Directions vs Fixed Address
104. Relative Reference: =A2*B2 Copied Downward
105. Absolute Reference: The Copy Problem and the $ Solution: =A2*$F$1
106. Absolute Reference: The $ Sign and the F4 Shortcut
107. Mixed Reference: =$A2 and =A$2: Lock Only One Side
108. Summary: Relative vs Absolute vs Mixed
109. Practical: GST Calculation Sheet
110. Practical: GST Sheet: Step by Step
111. Practice Example 1 of 5: Sales Commission at 5%
112. Practice Example 2 of 5: Dollar to Rupee Conversion
113. Practice Example 3 of 5: Festival Discount Price List
114. Practice Example 4 of 5: Multiplication Table (Mixed)
115. Practice Example 5 of 5: Branch Share of Total Sales

Module 9: Working with Dates and Time

116. Module 9: Working with Dates and Time
117. How Excel Thinks: Dates are Serial Numbers, Time is a Fraction
118. Entering Dates and Time: Typing Dates and Times Excel Understands
119. Date Formats: One Date, Many Looks
120. Today's Date and Time: =TODAY() and =NOW()
121. Date Calculations: Basic Date and Time Calculations
122. Practical: Employee Joining Date Register
123. Practice Example 1 of 5: Invoice Due Dates
124. Practice Example 2 of 5: Age Calculator for Admission Form
125. Practice Example 3 of 5: Office Working Hours
126. Practice Example 4 of 5: Event Countdown Board
127. Practice Example 5 of 5: Library Late Fine

Module 10: Working with Tables

128. Module 10: Working with Tables
129. What is an Excel Table?: Range vs Table
130. Why Tables?: 6 Reasons to Use Tables
131. Step-by-Step: Creating a Table in 5 Steps
132. Table Features: See the Table Grow: Automatic Expansion and Total Row
133. Table Features: Calculated Columns and Structured References
134. Practical: Customer Database
135. Practice Example 1 of 5: Computer Shop Inventory
136. Practice Example 2 of 5: Admission List by Course
137. Practice Example 3 of 5: Supplier Contact List
138. Practice Example 4 of 5: Canteen Daily Sales Log
139. Practice Example 5 of 5: Training Batch Register

Module 11: Sorting and Filtering

140. Module 11: Sorting and Filtering
141. Introduction: Sorting vs Filtering
142. Sorting: A-Z, Z-A, Numbers and Dates (try it)
143. Multi-level Sorting: Sort by Department, then by Salary
144. Filtering: Text, Number and Date Filters + Multiple Conditions
145. Workplace Scenario: The Manager's Request
146. Practical: Employee Data Investigation
147. Practical: Reporting Your Findings
148. Practice Example 1 of 5: Rank Students by Marks
149. Practice Example 2 of 5: Customers from Ranchi
150. Practice Example 3 of 5: March Sales above ₹50,000
151. Practice Example 4 of 5: Staff List by City, then Name
152. Practice Example 5 of 5: Find All LED Products
153. Recap: Cheat Sheet: Shortcuts from Modules 5-11
154. Course wrap-up
155. Thank you

1. Title
2. Why Blockchain Matters
3. The 4 Modules
4. How to Run the Simulations

Section 1 · Foundation

5. Section 1 · Foundation
6. The Problem
7. Blocks
8. Hashing
9. Building a Blockchain
10. Catching Fraud
11. 🔗 Simulation · Tamper-detector chain
12. 📝 Test · Foundation

Section 2 · Security

13. Section 2 · Security
14. Mining
15. Proof of Work
16. Decentralization
17. Consensus
18. 🔗 Simulation · A Proof-of-Work miner
19. 📝 Test · Security

Section 3 · Cryptocurrency

20. Section 3 · Cryptocurrency
21. Digital Wallets
22. Public & Private Key
23. Transactions
24. Bitcoin
25. 🔗 Simulation · Wallet + signed transactions
26. 📝 Test · Cryptocurrency

Section 4 · Beyond Cryptocurrency

27. Section 4 · Beyond Cryptocurrency
28. Smart Contracts
29. Ethereum
30. 🔗 Simulation · A smart contract in Python
31. 📝 Test · Beyond Cryptocurrency
32. 🗳️ Capstone · Tamper-proof voting ledger
33. Recap · What each idea gives you
34. Practice Challenges
35. Course Complete

1. Title
2. Git vs GitHub
3. The Road Ahead
4. Install & Configure Git

Topic 1 · Why Version Control?

5. Topic 1 · Why Version Control?
6. The problem
7. Without Git vs With Git
8. What Git gives you

Topic 2 · Core Git Commands

9. Topic 2 · Core Git Commands
10. The three areas
11. git init
12. git status & git add
13. git commit
14. git log
15. .gitignore
16. 🔌 Simulation · First repository
17. 📝 Test · Core Commands

Topic 3 · Branching

18. Topic 3 · Branching
19. Why branches
20. The pointer model
21. git branch & git switch
22. checkout -b
23. git merge
24. Branch naming
25. 🔌 Simulation · Branch & merge
26. 📝 Test · Branching

Topic 4 · Remote Repositories

27. Topic 4 · Remote Repositories
28. Local vs remote
29. git remote
30. git push
31. git pull & fetch
32. git clone
33. Daily team workflow

Topic 5 · GitHub Basics

34. Topic 5 · GitHub Basics
35. Create a repo on GitHub
36. Connect local ↔ GitHub
37. Auth: HTTPS token vs SSH
38. Professional README.md
39. Markdown reference
40. 🔌 Simulation · Push to GitHub
41. 📝 Test · Remotes & GitHub

Topic 6 · Resolving Merge Conflicts

42. Topic 6 · Resolving Merge Conflicts
43. What causes a conflict
44. Create one to practise
45. Reading the markers
46. Resolve in the terminal
47. Resolve in VS Code
48. Abort & prevent
49. 🔌 Simulation · Resolve a conflict
50. 📝 Test · Merge Conflicts
51. Cheat sheet
52. Practice challenges
53. You're Ready