Please enable JavaScript to use CodeHS

Points

Activity Points Item Type
Introduction to Programming
1.1 Welcome to AP CSP Lesson
1.1.1 Welcome to AP CSP 1 Video
1.1.2 Why AP CSP? 5 Free Response
1.2 Introduction to Programming With Karel Lesson
1.2.1 Introduction to Programming With Karel 1 Video
1.2.2 Quiz: Karel Commands 2 Check for Understanding
1.2.3 Our First Karel Program 5 Example
1.2.4 Your First Karel Program 5 Exercise
1.2.5 Short Stack 5 Exercise
1.2.6 Dancing Karel 5 Debugging
1.3 More Basic Karel Lesson
1.3.1 More Basic Karel 1 Video
1.3.2 More Basic Karel Quiz 4 Check for Understanding
1.3.3 Tennis Ball Square 5 Example
1.3.4 Make a Tower 5 Exercise
1.3.5 Pyramid of Karel 5 Exercise
1.3.6 Go Through the Door 5 Debugging
1.4 Karel Can't Turn Right Lesson
1.4.1 Karel Can't Turn Right 1 Video
1.4.2 Karel Can't Turn Right Quiz 2 Check for Understanding
1.4.3 Tower and Turn Right 5 Example
1.4.4 Fireman Karel 5 Exercise
1.4.5 Slide Karel 5 Exercise
1.4.6 Reflection: Teaching Karel New Commands 5 Free Response
1.4.7 Right Turn Karel Badge 0 Badge
1.5 Functions in Karel Lesson
1.5.1 Functions in Karel 1 Video
1.5.2 Functions in Karel Quiz 1 Check for Understanding
1.5.3 Turn Around 5 Example
1.5.4 Pancakes 5 Exercise
1.5.5 Backflip 5 Exercise
1.5.6 Digging Karel 5 Exercise
1.5.7 Build a Shelter 5 Debugging
1.6 Top Down Design and Decomposition in Karel Lesson
1.6.1 Top Down Design and Decomposition in Karel 1 Video
1.6.2 Top Down Design and Decomposition Quiz 2 Check for Understanding
1.6.3 Hurdle Karel 5 Example
1.6.4 The Two Towers 5 Exercise
1.6.5 Make a 'Z' 5 Debugging
1.6.6 Reflection: Top Down Design 5 Free Response
1.7 Commenting Your Code Lesson
1.7.1 Commenting Your Code 1 Video
1.7.2 Commenting Your Code Quiz 1 Check for Understanding
1.7.3 Hurdle Karel 5 Example
1.7.4 The Two Towers + Comments 5 Exercise
1.7.5 Reflection: Commenting 5 Free Response
1.8 Abstraction Lesson
1.8.1 Abstraction 1 Video
1.8.2 Abstraction Quiz 2 Check for Understanding
1.8.3 Abstracting Away build_tower 5 Example
1.8.4 Abstracting Your Day 5 Free Response
1.8.5 Reflection: Abstraction 5 Free Response
1.8.6 Reflection: Abstraction in Karel 5 Free Response
1.9 Super Karel Lesson
1.9.1 Super Karel 1 Video
1.9.2 Super Karel Quiz 1 Check for Understanding
1.9.3 Hurdle Karel (with SuperKarel) 5 Example
1.9.4 The Two Towers + SuperKarel 5 Exercise
1.9.5 Super Karel Badge 0 Badge
1.10 For Loops Lesson
1.10.1 For Loops 1 Video
1.10.2 For Loops Quiz 1 Check for Understanding
1.10.3 Repeated Move 5 Example
1.10.4 Put Down Tennis Balls 5 Example
1.10.5 Take 'em All 5 Exercise
1.10.6 Dizzy Karel 5 Exercise
1.10.7 For Loop Square 5 Exercise
1.10.8 Lots of Hurdles 5 Exercise
1.11 If Statements Lesson
1.11.1 If Statements 1 Video
1.11.2 If Statements Quiz 2 Check for Understanding
1.11.3 If Statements 5 Example
1.11.4 Safe Take Ball 5 Example
1.11.5 Is There a Ball? 5 Exercise
1.11.6 Mindsets 5 Survey
1.12 If/Else Statements Lesson
1.12.1 If/Else Statements 1 Video
1.12.2 If/Else Statements Quiz 2 Check for Understanding
1.12.3 If/Else Statements 5 Example
1.12.4 One Ball in Each Spot 5 Example
1.12.5 Right Side Up 5 Exercise
1.12.6 Conditional Karel Badge 0 Badge
1.13 While Loops in Karel Lesson
1.13.1 While Loops in Karel 1 Video
1.13.2 While Loops in Karel Quiz 2 Check for Understanding
1.13.3 Move to Wall 5 Example
1.13.4 Follow The Yellow Ball Road 5 Exercise
1.13.5 Lay Row of Tennis Balls 5 Exercise
1.13.6 Big Tower 5 Exercise
1.14 Control Structures Example Lesson
1.14.1 Control Structures Example 1 Video
1.14.2 Control Structures Example Quiz 2 Check for Understanding
1.14.3 Cleanup Karel 5 Example
1.14.4 Random Hurdles 5 Exercise
1.15 Debugging Strategies Lesson
1.15.1 Debugging Basics 1 Video
1.15.2 Debugging Basics 2 Check for Understanding
1.15.3 Debug: The Two Towers 5 Debugging
1.15.4 Debug: Lots of Hurdles 5 Debugging
1.15.5 Debugging From Error Messages 1 Video
1.15.6 Debugging with Error Messages 2 Check for Understanding
1.15.7 Debug: Big Tower 5 Debugging
1.15.8 Debug: Random Hurdles 5 Debugging
1.16 Algorithms Lesson
1.16.1 Karel Algorithms 1 Video
1.16.2 Quiz: Which Control Structure? 5 Check for Understanding
1.16.3 Algorithms Example: Move Stack 1 Video
1.16.4 Move Tennis Ball Stack 1 Example
1.16.5 Climbing Karel 1 Example
1.16.6 Decorate the Fence 5 Exercise
1.17 Ultra Karel Lesson
1.17.1 Ultra Karel 1 Video
1.17.2 Ultra Karel Quiz 2 Check for Understanding
1.17.3 Red Frame 5 Example
1.17.4 Slip 'n Slide 5 Example
1.17.5 Invert Colors 5 Exercise
1.17.6 Checkerboard Karel 5 Exercise
1.17.7 Karel Exercises Badge 0 Badge
1.18 Karel Challenges Lesson
1.18.1 Fetch 10 Challenge
1.18.2 Racing Karel 10 Challenge
1.18.3 Tower Builder 10 Challenge
1.18.4 Super Cleanup Karel 10 Challenge
1.18.5 Double Tennis Balls 10 Challenge
1.18.6 Programming with Karel Bootcamp Badge 0 Badge
1.19 Introduction to Programming Quiz Lesson
1.19.1 Introduction to Programming Quiz 25 Unit Quiz
Practice PT: Pair-Programming Paint!
2.1 Practice PT: Pair-Programming Paint! Lesson
2.1.1 Pair-Programming 1 Video
2.1.2 Pair-Programming 2 Check for Understanding
2.1.3 Create PT Scoring Guidelines 5 Connection
2.1.4 Reflection: Pair-Programming 5 Free Response
2.1.5 Setting Norms 5 Free Response
2.1.6 Brainstorm and Discuss 5 Free Response
2.1.7 Planning 5 Free Response
2.1.8 Program Documentation 5 Free Response
2.1.9 Pseudocode 5 Free Response
2.1.10 Create your UltraKarel Image! 10 Challenge
2.1.11 Reflection 5 Free Response
2.1.12 Karel Practice PT Badge 0 Badge
Programming with Python
3.1 What is Code Lesson
3.1.1 What is Code? 1 Video
3.1.2 What is Software 1 Connection
3.1.3 Respond: What is Software 5 Free Response
3.2 Uses of Programs Lesson
3.2.1 Uses of Programs 1 Video
3.2.2 Why Should You Learn to Program? 1 Connection
3.2.3 Reflection: Learning to Program 5 Free Response
3.2.4 Reflection: Programs in Your Life 5 Free Response
3.2.5 Reflection: Future Programs 5 Free Response
3.2.6 Task: Computing Innovations 5 Free Response
3.3 Hello World Lesson
3.3.1 Hello World 1 Video
3.3.2 Hello World Quiz 2 Check for Understanding
3.3.3 Hello World 1 Example
3.3.4 Your Name and Hobby 5 Exercise
3.4 Variables Lesson
3.4.1 Variables 1 Video
3.4.2 Variables Quiz 2 Check for Understanding
3.4.3 String Operators 5 Video
3.4.4 String Operators Quiz 2 Check for Understanding
3.4.5 Basic Variables 1 Example
3.4.6 Apples and Oranges 5 Exercise
3.4.7 AP Practice: Variables 2 AP Practice
3.5 User Input Lesson
3.5.1 User Input 1 Video
3.5.2 User Input Quiz 2 Check for Understanding
3.5.3 Basic User Input 1 Example
3.5.4 Obi-Wan Says 5 Exercise
3.5.5 AP Practice: User Input 3 AP Practice
3.5.6 User Input Badge 0 Badge
3.6 Basic Math in Python Lesson
3.6.1 Basic Math in Python 1 Video
3.6.2 Basic Math in Python Quiz 2 Check for Understanding
3.6.3 Order of Operations 1 Example
3.6.4 Dollars to Pounds 1 Example
3.6.5 Division in Python 5 Example
3.6.6 Dividing Up Groups 1 Example
3.6.7 Sporting Goods Shop 5 Exercise
3.6.8 Running Speed 5 Exercise
3.6.9 24 vs. "24" 5 Exercise
3.6.10 AP Practice: Arithmetic Operators 4 AP Practice
3.7 Using Graphics in Python Lesson
3.7.1 Graphics 1 Video
3.7.2 Python Graphics Quiz 2 Check for Understanding
3.7.3 Graphics Hello World 1 Example
3.7.4 Blue Circle 1 Example
3.7.5 Red Rectangle 1 Example
3.7.6 Using get_width And get_height 5 Video
3.7.7 8 Ball 1 Example
3.7.8 French Flag 5 Exercise
3.7.9 Snowman 5 Exercise
3.7.10 Programming with Graphics Bootcamp Badge 0 Badge
3.8 Mouse Events: Mouse Clicked Lesson
3.8.1 Mouse Events: Mouse Clicked 1 Video
3.8.2 Mouse Events: Mouse Clicked Quiz 2 Check for Understanding
3.8.3 Click For Circles 1 Example
3.8.4 Click For Mickey 1 Example
3.8.5 Click for Rectangles 5 Exercise
3.9 Programming with Python Quiz Lesson
3.9.1 Programming with Python Quiz 25 Unit Quiz
Python Control Structures
4.1 Booleans Lesson
4.1.1 Booleans 1 Video
4.1.2 Booleans Quiz 1 Check for Understanding
4.1.3 First Boolean 1 Example
4.1.4 Do You Have a Cat? 5 Exercise
4.2 Logical Operators Lesson
4.2.1 Logical Operators 1 Video
4.2.2 Logical Operators Quiz 3 Check for Understanding
4.2.3 Light Switch 1 Example
4.2.4 President 1 Example
4.2.5 Wasting Time 1 Example
4.2.6 Can You Graduate? 5 Exercise
4.2.7 School's Out 5 Exercise
4.3 Comparison Operators Lesson
4.3.1 Comparison Operators 1 Video
4.3.2 Comparison Operators Quiz 2 Check for Understanding
4.3.3 Voting Age 1 Example
4.3.4 Grade Range 1 Example
4.3.5 Rolling Dice 5 Exercise
4.3.6 All Star 5 Exercise
4.3.7 AP Practice: Comparison Operators 4 AP Practice
4.4 If Statements Lesson
4.4.1 If Statements 1 Video
4.4.2 If Statements Quiz 2 Check for Understanding
4.4.3 Negative Numbers 1 Example
4.4.4 Great Names 1 Example
4.4.5 Even and Odd 1 Example
4.4.6 Secret Password 1 Example
4.4.7 Teenagers 5 Exercise
4.4.8 Meal Planner 5 Exercise
4.4.9 AP Practice: If/Else Statements 4 AP Practice
4.4.10 Conditionals Badge 0 Badge
4.5 Key Events Lesson
4.5.1 Key Events 1 Video
4.5.2 Key Events Quiz 1 Check for Understanding
4.5.3 Keyboard Square 1 Example
4.5.4 Growing Circle 5 Exercise
4.5.5 Graphics Badge 0 Badge
4.6 For Loops in Python Lesson
4.6.1 Basic For Loop 1 Video
4.6.2 For Loops Quiz 2 Check for Understanding
4.6.3 For Loop 1 Example
4.6.4 Meme Text Generator 5 Exercise
4.6.5 The Worm 5 Exercise
4.6.6 Caterpillar 5 Exercise
4.7 General For Loops Lesson
4.7.1 General For Loop 1 Video
4.7.2 General For Loop Quiz 2 Check for Understanding
4.7.3 Countdown 1 Example
4.7.4 Count By Twos 1 Example
4.7.5 Count By Sevens 5 Exercise
4.7.6 Powers of Two 5 Exercise
4.8 For Loop Practice Lesson
4.8.1 For Loop Examples 1 Video
4.8.2 For Loop Examples Quiz 2 Check for Understanding
4.8.3 For Loop Sum 1 Example
4.8.4 Better Sum 5 Exercise
4.8.5 Factorial 5 Exercise
4.8.6 All Dice Values 5 Exercise
4.9 Random Numbers Lesson
4.9.1 Random Numbers 1 Video
4.9.2 Random Numbers Quiz 2 Check for Understanding
4.9.3 Rolling a Die 1 Example
4.9.4 Flipping a Coin 1 Example
4.9.5 Lots of Dice 5 Exercise
4.9.6 Random Color Square 5 Exercise
4.9.7 Mindsets 5 Survey
4.10 While Loops Lesson
4.10.1 While Loops 1 Video
4.10.2 While Loops Quiz 2 Check for Understanding
4.10.3 While Loop Countdown 1 Example
4.10.4 Inventory 5 Exercise
4.10.5 Fibonacci 5 Exercise
4.10.6 AP Practice: Iteration 7 AP Practice
4.11 Loop and a Half Lesson
4.11.1 Loop and a Half 1 Video
4.11.2 Loop and a Half Quiz 2 Check for Understanding
4.11.3 Adding Up Numbers 1 Example
4.11.4 Snake Eyes 5 Exercise
4.11.5 Better Password Prompt 5 Exercise
4.11.6 Looper Badge 0 Badge
4.12 Python Control Structures Quiz Lesson
4.12.1 Python Control Structures Quiz 25 Unit Quiz
Functions and Parameters
5.1 Functions and Parameters 1 Lesson
5.1.1 Functions and Parameters 1 1 Video
5.1.2 Functions and Parameters Quiz 1 3 Check for Understanding
5.1.3 Double Number 1 Example
5.1.4 Square 5 Exercise
5.1.5 Triple 5 Exercise
5.2 Functions and Parameters 2 Lesson
5.2.1 Functions and Parameters 2 1 Video
5.2.2 Functions and Parameters Quiz 2 2 Check for Understanding
5.2.3 Sum Function 1 Example
5.2.4 Area of Triangle 5 Exercise
5.2.5 Height in Meters 5 Exercise
5.3 Functions and Parameters 3 Lesson
5.3.1 Functions and Parameters 3 1 Video
5.3.2 Functions and Parameters Quiz 3 2 Check for Understanding
5.3.3 Draw Circles 1 Example
5.3.4 Horizontal Lines 5 Exercise
5.3.5 Graphics Stop Light 5 Exercise
5.3.6 Pool Table 5 Exercise
5.3.7 Parameters Badge 0 Badge
5.4 Functions and Return Values 1 Lesson
5.4.1 Functions and Return Values 1 1 Video
5.4.2 Functions and Return Values 1 Quiz 2 Check for Understanding
5.4.3 Double Number 1 Example
5.4.4 Square with Return Values 5 Exercise
5.4.5 Quadruple with Return Values 5 Exercise
5.5 Functions and Return Values 2 Lesson
5.5.1 Functions and Return Values 2 1 Video
5.5.2 Functions and Return Values Quiz 2 2 Check for Understanding
5.5.3 Return Values 1 Example
5.5.4 Is It Even? 5 Exercise
5.5.5 Min 5 Exercise
5.6 Local Variables and Scope Lesson
5.6.1 Local Variables and Scope 1 Video
5.6.2 Local Variables and Scope Quiz 2 Check for Understanding
5.6.3 Return Values 1 Example
5.6.4 Local Variables 5 Exercise
5.7 Python vs Karel Lesson
5.7.1 Python vs Karel 1 Video
5.7.2 Making Karel's World 1 Example
5.7.3 Making Karel Turn Left 1 Example
5.7.4 Making Karel Turn Right 5 Exercise
5.7.5 Making Karel Move 5 Exercise
5.7.6 What is an API? 1 Connection
5.7.7 Reflection: Is Karel an API? 5 Free Response
5.7.8 Python Exercises Badge 0 Badge
5.8 Basic Python and Graphics Challenges Lesson
5.8.1 Ghosts 10 Challenge
5.8.2 Guessing Game 10 Challenge
5.8.3 Draw Something 10 Challenge
5.8.4 Python Challenges Badge 0 Badge
5.9 Functions and Parameters Quiz Lesson
5.9.1 Functions and Parameters Quiz 25 Unit Quiz
Practice PT: Tell a Story
6.1 Practice PT: Tell a Story Lesson
6.1.1 Tell a Story Demo 1 Demo
6.1.2 Create PT Scoring Guidelines 5 Connection
6.1.3 Brainstorm and Discuss 5 Free Response
6.1.4 Planning 5 Free Response
6.1.5 Pseudocode 5 Free Response
6.1.6 Tell a Story! 10 Challenge
6.1.7 Reflection 5 Free Response
Basic Data Structures
7.1 Tuples Lesson
7.1.1 Tuples 0 Video
7.1.2 Tuples 2 Check for Understanding
7.1.3 A Tuple Is a Sequence 0 Example
7.1.4 A Tuple is Heterogenous 0 Example
7.1.5 Tuples With a Single Element 0 Example
7.1.6 Concatenating Tuples 0 Example
7.1.7 Fix This Tuple 5 Exercise
7.1.8 Citation 5 Practice
7.1.9 Diving Contest 5 Practice
7.1.10 Coordinate Pairs 10 Practice
7.2 Lists Lesson
7.2.1 Lists 0 Video
7.2.2 Lists 1 Check for Understanding
7.2.3 A List Is Like a Mutable Tuple 0 Example
7.2.4 List of Tuples, Tuples of Lists 0 Example
7.2.5 String <--> List 0 Example
7.2.6 Spell It Out 5 Practice
7.2.7 Splitting a String 0 Example
7.2.8 Listed Greeting 5 Practice
7.2.9 Top Movies 5 Exercise
7.2.10 AP Practice: Lists 4 AP Practice
7.3 For Loops and Lists Lesson
7.3.1 For Loops and Lists 0 Video
7.3.2 For Loops and Lists 2 Check for Understanding
7.3.3 Sum List 5 Example
7.3.4 For Loops and Lists 0 Example
7.3.5 For Loops and Lists, Part 2 0 Example
7.3.6 Max In List 5 Practice
7.3.7 Owls 5 Practice
7.3.8 Exclamat!on Po!nts 5 Practice
7.3.9 Word Ladder 10 Challenge
7.3.10 Algorithm Efficiency 5 Example
7.4 List Methods Lesson
7.4.1 List Methods 0 Video
7.4.2 List Methods 2 Check for Understanding
7.4.3 Append and Extend 0 Example
7.4.4 How Many Names? 5 Exercise
7.4.5 Five Numbers 5 Exercise
7.4.6 Sort 0 Example
7.4.7 Librarian 5 Exercise
7.4.8 Reflection: World Without List! 5 Free Response
7.4.9 Reverse 0 Example
7.4.10 Count 0 Example
7.4.11 Remove 0 Example
7.4.12 Empty List (Append and Remove) 5 Exercise
7.4.13 Take a Thing Out, Sort It and Reverse It 5 Practice
7.4.14 Librarian, Part 2 10 Challenge
7.4.15 Owls, Part 2 10 Challenge
7.4.16 AP Practice: List Procedures 4 AP Practice
7.4.17 Lists Badge 0 Badge
7.5 Simulation Lesson
7.5.1 Simulation 1 Video
7.5.2 Gravity Simulation 1 Example
7.5.3 Conway's Game of Life 1 Example
7.5.4 Simulating a Coin Flip 5 Exercise
7.5.5 Wolf Sheep Predation Simulation 1 Connection
7.5.6 Data Structures Exercises Badge 0 Badge
7.6 Basic Data Structures Quiz Lesson
7.6.1 Basic Data Structures Quiz 15 Unit Quiz
Digital Information
8.1 Intro to Digital Information Lesson
8.1.1 What is Digital Information? 1 Video
8.1.2 What is Digital Information Quiz 2 Check for Understanding
8.1.3 Fast Food Menu 1 Example
8.1.4 DNA 1 Example
8.1.5 Reflection: Encodings Everywhere 5 Free Response
8.2 Number Systems Lesson
8.2.1 Number Systems 1 Video
8.2.2 Number Base Tool 1 Notes
8.2.3 Number Systems Quiz 2 Check for Understanding
8.2.4 Decimal to Binary 1 Video
8.2.5 Decimal to Binary Quiz 1 Check for Understanding
8.2.6 Binary Game 5 Exercise
8.2.7 Overflow Error 5 Exercise
8.2.8 More Overflow Errors 1 Example
8.3 Encoding Text with Binary Lesson
8.3.1 Encoding Text with Binary 1 Video
8.3.2 Encoding Text with Binary Quiz 2 Check for Understanding
8.3.3 Morse Code 1 Example
8.3.4 Decoding a Binary Message 1 Example
8.3.5 2-bit Custom Encoding 1 Example
8.3.6 Bits to ASCII 1 Example
8.3.7 Hello Karel in Bits 5 Exercise
8.3.8 Create your own Encoding 5 Exercise
8.3.9 Text to Binary 5 Exercise
8.3.10 Encoding Badge 0 Badge
8.4 Pixel Images Lesson
8.4.1 Pixel Images 1 Video
8.4.2 Pixel Images Quiz 1 Check for Understanding
8.4.3 Creating Pixel Images 5 Resource
8.4.4 CodeHS Logo 1 Example
8.4.5 Checkerboard 5 Exercise
8.4.6 Ladder 5 Exercise
8.4.7 Create an Image! 5 Exercise
8.5 Hexadecimal Lesson
8.5.1 Hexadecimal 1 Video
8.5.2 Hexadecimal Quiz 2 Check for Understanding
8.5.3 Hexadecimal to Decimal 1 Example
8.5.4 Binary to Hex Game 5 Exercise
8.6 Pixel Colors! Lesson
8.6.1 Pixel Colors 1 Video
8.6.2 Pixel Colors Quiz 3 Check for Understanding
8.6.3 Colors in Bits 1 Example
8.6.4 Colors in Text 1 Example
8.6.5 Colors in RGB 1 Example
8.6.6 Exploring RGB 5 Exercise
8.6.7 Making Yellow 5 Exercise
8.6.8 Rainbow 5 Exercise
8.6.9 Create a Color Image! 5 Exercise
8.7 Image Manipulation Lesson
8.7.1 Manipulating Images 1 Video
8.7.2 Manipulating Images Quiz 1 Check for Understanding
8.7.3 Programming with Images 1 Video
8.7.4 Programming with Images Quiz 2 Check for Understanding
8.7.5 Black and White Filter 1 Example
8.7.6 Brighten Filter 1 Example
8.7.7 Saturation Filter 1 Example
8.7.8 Invert Filter 5 Exercise
8.7.9 Blue Filter 5 Exercise
8.7.10 Darken Filter 5 Exercise
8.7.11 Image Manipulation Badge 0 Badge
8.8 Data Compression Lesson
8.8.1 Data Compression 1 Video
8.8.2 Data Compression Quiz 2 Check for Understanding
8.8.3 Run Length Encoding 1 Video
8.8.4 Run Length Encoding Quiz 2 Check for Understanding
8.8.5 Run Length Encoding 1 Example
8.8.6 Custom Image Compression 1 Example
8.8.7 Respond: Custom Image Compression 5 Free Response
8.9 Lossy Compression Lesson
8.9.1 Lossy Compression 1 Video
8.9.2 Lossy Compression Quiz 1 Check for Understanding
8.9.3 Remove the Vowels 1 Example
8.9.4 Decreasing Resolution 5 Exercise
8.9.5 Analog to Digital 1 Connection
8.9.6 Respond: Analog to Digital 5 Free Response
8.10 Cryptography Lesson
8.10.1 Cryptography 1 Video
8.10.2 Cryptography Quiz 2 Check for Understanding
8.10.3 Implementing Caesar's Cipher 1 Video
8.10.4 Implementing Caesar's Cipher Quiz 1 Check for Understanding
8.10.5 Encrypting with a Caesar Cipher 1 Example
8.10.6 Cracking a Caesar Cipher 1 Example
8.10.7 Reflection: Caesar Cipher 5 Free Response
8.10.8 Guess the Passcode 5 Exercise
8.11 Digital Information Quiz Lesson
8.11.1 Digital Information Quiz 15 Unit Quiz
8.11.2 Digital Information Badge 0 Badge
Practice PT: Steganography
9.1 Practice PT: Steganography Lesson
9.1.1 Secret Message Steganography 1 Demo
9.1.2 Secret Image Steganography Demo 1 Demo
9.1.3 Create PT Scoring Guidelines 5 Connection
9.1.4 Secret Image Steganography 10 Challenge
Practice PT: Create an Image Filter!
10.1 Practice PT: Create an Image Filter! Lesson
10.1.1 Create PT Scoring Guidelines 5 Connection
10.1.2 Practice PT: Create an Image Filter! 10 Challenge
10.1.3 Reflection 5 Free Response
The Internet
11.1 Welcome to the Internet Lesson
11.1.1 Welcome to the Internet 1 Video
11.1.2 Welcome to the Internet Quiz 1 Check for Understanding
11.1.3 Reflection: The Internet and You 5 Free Response
11.2 Internet Hardware Lesson
11.2.1 Devices and Networks 1 Video
11.2.2 Hardware of the Internet 1 Video
11.2.3 Internet Hardware Quiz 3 Check for Understanding
11.2.4 The Internet is in the Ocean 1 Connection
11.3 Internet Addresses Lesson
11.3.1 Internet Addresses 1 Video
11.3.2 Internet Addresses Quiz 1 Check for Understanding
11.3.3 Free Response: The Need for Addresses 5 Free Response
11.3.4 4-bit Addresses 1 Check for Understanding
11.3.5 Free Response: IPv4 vs IPv6 5 Free Response
11.4 Viewing Websites Lesson
11.4.1 Viewing Websites 1 Video
11.4.2 Viewing Websites Quiz 5 Check for Understanding
11.4.3 Free Response: Explaining a URL 5 Free Response
11.5 DNS Lesson
11.5.1 DNS 1 Video
11.5.2 DNS Quiz 2 Check for Understanding
11.5.3 How Does DNS Work? 1 Connection
11.5.4 Respond: How Does DNS Work? 5 Free Response
11.5.5 DNS Badge 0 Badge
11.6 Routing Lesson
11.6.1 Routing 1 Video
11.6.2 Routing Quiz 1 Check for Understanding
11.6.3 Free Response: Redundancy 5 Free Response
11.6.4 Route Tracing 5 Traceroute
11.7 Packets and Protocols Lesson
11.7.1 Packets and Protocols 1 Video
11.7.2 Packets and Protocols Quiz 1 Check for Understanding
11.7.3 Passing Notes 10 Resource
11.7.4 How the Internet Works 1 Connection
11.7.5 The Story of the Internet 5 Free Response
11.8 Sequential, Parallel & Distributed Computing Lesson
11.8.1 Computer Processing Operations 1 Video
11.8.2 Computer Processing Operations Quiz 2 Check for Understanding
11.8.3 Sequential vs. Parallel Activity 5 Resource
11.8.4 Free Response: Sequential vs. Parallel 5 Free Response
11.9 Cybersecurity Lesson
11.9.1 Cybersecurity 1 Video
11.9.2 Cybersecurity Quiz 1 Check for Understanding
11.9.3 You Can Be Tracked! 1 Example
11.9.4 Website Cookies 1 Connection
11.9.5 Password Strength 1 Connection
11.9.6 Reflection: Password Strength 5 Free Response
11.9.7 Multifactor Authentication 1 Example
11.9.8 Reflection: PII 5 Free Response
11.9.9 Phishing Simulator 1 Example
11.9.10 Rogue Access Points 1 Connection
11.9.11 Mindsets 5 Survey
11.10 The Impact of the Internet Lesson
11.10.1 The Impact of the Internet 1 Video
11.10.2 The Impact of the Internet Quiz 2 Check for Understanding
11.10.3 Reflection: Internet Impact 5 Free Response
11.10.4 Crucial Steps to Close the Digital Divide 1 Connection
11.10.5 Reflection: Closing the Digital Divide 5 Free Response
11.10.6 Pokemon Go: Unintended Effects 1 Connection
11.10.7 Reflection: Unintended Effects 5 Free Response
11.11 Creative Credit & Copyright Lesson
11.11.1 Creative Credit and Copyright 1 Video
11.11.2 Creative Credit and Copyright 2 Check for Understanding
11.11.3 Reflection: Cite! 5 Free Response
11.11.4 Exploring Creative Commons 1 Connection
11.11.5 Respond: Creative Commons 5 Free Response
11.11.6 Task: Finding Images 5 Free Response
11.11.7 Reflection: Why is Copyright Important? 5 Free Response
11.12 The Internet Quiz Lesson
11.12.1 The Internet Quiz 15 Unit Quiz
11.12.2 The Internet Badge 0 Badge
Project: The Effects of the Internet
12.1 The Effects of the Internet Lesson
12.1.1 Topic Brainstorm 5 Free Response
12.1.2 Gathering Resources 5 Free Response
12.1.3 Make Your Artifact 25 Presentation
12.1.4 Written Responses 5 Free Response
Data
13.1 Getting Started with Data Lesson
13.1.1 Getting Started with Data 1 Video
13.1.2 Getting Started with Data Quiz 3 Check for Understanding
13.1.3 What Do We Do With Data? 1 Connection
13.1.4 Reflection: Continuously Collecting Data 5 Free Response
13.2 Visualizing and Interpreting Data Lesson
13.2.1 Visualizing Data 1 Video
13.2.2 Visualizing Data Quiz 3 Check for Understanding
13.2.3 Exploring Data Visualizations 1 Notes
13.2.4 US Recorded Music Revenue 1 Connection
13.2.5 National Parks 1 Connection
13.2.6 March Madness 1 Connection
13.2.7 Captain Marvel 1 Connection
13.2.8 Respond: Visualizations 5 Free Response
13.2.9 Free Response: Choosing a Visualization 5 Free Response
13.2.10 Visualizing & Interpreting Data Quiz 3 Check for Understanding
13.3 Data Collection & Limitations Lesson
13.3.1 Collecting Data 1 Video
13.3.2 Collecting Data Quiz 2 Check for Understanding
13.3.3 Reflection: Design a Survey 5 Free Response
13.3.4 Reflection: Self-Driving Cars 5 Free Response
13.3.5 Data Collection Quiz 2 Check for Understanding
13.3.6 Data Limitations 1 Video
13.3.7 Interpreting Data Quiz 2 Check for Understanding
13.3.8 Line Graph 1 Example
13.3.9 Bar Graph 1 Example
13.3.10 Pie Chart 1 Example
13.3.11 Reflection: Importance of Metadata 5 Free Response
13.4 Data Quiz Lesson
13.4.1 Data Quiz 12 Unit Quiz
Project: Present a Data-Driven Insight
14.1 Present a Data-Driven Insight Lesson
14.1.1 Topic Brainstorm 5 Free Response
14.1.2 Gathering Resources 5 Free Response
14.1.3 Make a Visualization 25 Presentation
14.1.4 Written Responses 5 Free Response
14.1.5 Share Your Findings 5 Free Response
Project: The Impact of Computing
15.1 The Impacts of Computing Lesson
15.1.1 Artifact Creation 5 Free Response
15.1.2 Selecting Computing Innovations 5 Free Response
15.1.3 Data as an Input and an Output 5 Free Response
15.1.4 Data Privacy and Security 5 Free Response
Create Performance Task
16.1 Create Performance Task Lesson
16.1.1 Create Performance Task 10 Challenge
AP Exam Review
17.1 Preparation Lesson
17.1.1 AP Exam Reference Sheet 0 Resource
17.2 Practice AP Exam Lesson
17.2.1 Practice AP Exam 70 AP Practice
Creative Development
18.1 Intro to Design Thinking Lesson
18.1.1 Intro to Design Thinking 1 Video
18.1.2 Intro to Design Thinking 1 Check for Understanding
18.1.3 User Interface Scavenger Hunt 5 Free Response
18.1.4 Case Study: Helping Blind People See 1 Connection
18.1.5 Case Study Responses 5 Free Response
18.1.6 Tell a Story Demo 1 Demo
18.1.7 Brainstorming Project Ideas 5 Free Response
18.2 Prototype Lesson
18.2.1 Prototype 1 Video
18.2.2 Prototype Quiz 1 Check for Understanding
18.2.3 Wizard of Oz Prototyping 1 Connection
18.2.4 Example Wizard of Oz Paper Prototype 1 Connection
18.2.5 Make Your Paper Prototypes! 5 Free Response
18.3 Test Lesson
18.3.1 Test 1 Video
18.3.2 Testing Quiz 1 Check for Understanding
18.3.3 Testing with Users 1 Connection
18.3.4 Example: How to User Test 1 Connection
18.3.5 How to User Test Responses 5 Free Response
18.3.6 Example: How NOT to User Test 1 Connection
18.3.7 How NOT to User Test Responses 5 Free Response
18.3.8 How to Make Accessible Programs 5 Resource
18.3.9 Test Prototype 1 5 Free Response
18.3.10 Test Prototype 2 5 Free Response
18.3.11 Improve Your Prototype 5 Free Response
18.4 Project Prep and Development Lesson
18.4.1 Online Collaboration Tools 5 Free Response
18.4.2 Pseudocode 5 Free Response
18.4.3 Write the Code! 10 Challenge
18.4.4 Present your Project 5 Presentation
18.4.5 Mindsets 5 Survey
Final
19.1 Final Lesson
19.1.1 Final Pt 1: Multiple Choice 21 Final
Midterm
20.1 Midterm Lesson
20.1.1 Midterm: Multiple Choice 10 Midterm
Computer Science Principles Pretest
21.1 Computer Science Principles Pretest Lesson
21.1.1 About the Pretest 1 Notes
21.1.2 Mindsets 0 Survey
21.1.3 Knowledge & Skills: Computer Science Principles 15 Quiz
Computer Science Principles Posttest
22.1 Computer Science Principles Posttest Lesson
22.1.1 About the Posttest 1 Notes
22.1.2 Mindsets 0 Survey
22.1.3 Computer Science Principles Knowledge & Skills 15 Quiz
Extra Karel Practice
23.1 Extra Karel Practice Lesson
23.1.1 Functions Practice: K For Karel 10 Challenge
23.1.2 Functions Practice: Christmas Karel 10 Challenge
23.1.3 Functions Practice: X Marks the Spot 10 Challenge
23.1.4 While Loop Practice: Blackout 10 Challenge
23.1.5 While Loop Practice: Move To Top 10 Challenge
23.1.6 Functions and While Loop Practice: Opposite Corner 10 Challenge
23.1.7 While Loop Practice: Checkered Row 10 Challenge
23.1.8 For Loop Practice: Tall Hurdles 10 Challenge
23.1.9 Functions and While Loop Practice: Row and Back 10 Challenge
23.1.10 Functions and For Loop Practice: Opposite Squares 10 Challenge
23.1.11 Stairway To Heaven 10 Challenge
23.1.12 Karel Practice Badge 0 Badge
Extra Karel Puzzles
24.1 Extra Karel Puzzles Lesson
24.1.1 Midpoint Karel 10 Challenge
24.1.2 Target Karel 10 Challenge
24.1.3 The Winding Yellow Road 10 Challenge
24.1.4 Super Random Hurdles 10 Challenge
24.1.5 Copy 10 Challenge
24.1.6 Multiply 10 Challenge
24.1.7 Fibonacci Karel 10 Challenge
24.1.8 Comparison Karel 10 Challenge
24.1.9 Swap 10 Challenge
24.1.10 Sorting Karel 10 Challenge
24.1.11 Karel Puzzles Badge 0 Badge
Karel Challenges
25.1 Challenge Problems Lesson
25.1.1 Fetch 10 Challenge
25.1.2 Racing Karel 10 Challenge
25.1.3 Tower Builder 10 Challenge
25.1.4 Super Cleanup Karel 10 Challenge
25.1.5 Double Tennis Balls 10 Challenge
25.1.6 Karel Unit Test 24 Check for Understanding
25.1.7 Karel Challenges Badge 0 Badge
Web Development
26.1 Introduction to HTML Lesson
26.1.1 Introduction to HTML 1 Video
26.1.2 Introduction to HTML Quiz 1 Check for Understanding
26.1.3 Our First HTML Page 1 Example
26.1.4 Say Hello! 5 Exercise
26.2 Structure of an HTML Page Lesson
26.2.1 Structure of an HTML Page 1 Video
26.2.2 Structure of an HTML Page Quiz 1 Check for Understanding
26.2.3 HTML Template 1 Example
26.2.4 Hello World Page 1 Example
26.2.5 The <title> Tag 5 Exercise
26.2.6 Your First HTML Page 5 Exercise
26.2.7 Structure Badge 0 Badge
26.3 Formatting Text Lesson
26.3.1 Formatting Text 1 Video
26.3.2 Formatting Text Quiz 1 Check for Understanding
26.3.3 Dictionary 1 Example
26.3.4 That's Bold 5 Exercise
26.3.5 Artificial Intelligence 5 Exercise
26.3.6 State Capitals 5 Exercise
26.4 Links Lesson
26.4.1 Links 1 Video
26.4.2 Links Quiz 1 Check for Understanding
26.4.3 The <a> Tag 1 Example
26.4.4 Simple Link 5 Exercise
26.4.5 My Favorite Websites 5 Exercise
26.5 Images Lesson
26.5.1 Images 1 Video
26.5.2 Images Quiz 1 Check for Understanding
26.5.3 The <img> Tag 1 Example
26.5.4 Building the CodeHS Homepage 1 Example
26.5.5 Collage on a Theme 5 Exercise
26.5.6 Linking an Image 5 Exercise
26.5.7 Personal Library 5 Exercise
26.5.8 Images Badge 0 Badge
26.6 HTML Lists Lesson
26.6.1 HTML Lists 1 Video
26.6.2 HTML Lists Quiz 1 Check for Understanding
26.6.3 Grocery Shopping 1 Example
26.6.4 Favorite Things 5 Exercise
26.6.5 To-Do List 5 Exercise
26.6.6 List Article 5 Exercise
26.7 HTML Tables Lesson
26.7.1 HTML Tables 1 Video
26.7.2 HTML Tables Quiz 3 Check for Understanding
26.7.3 Address Book 1 Example
26.7.4 Favorite Songs 5 Exercise
26.7.5 Calendar 5 Exercise
26.8 HTML Styling Lesson
26.8.1 HTML Styling 1 Video
26.8.2 HTML Styling Quiz 1 Check for Understanding
26.8.3 Stylish Address Book 1 Example
26.8.4 Background Colors 5 Exercise
26.8.5 Style Your To-Do List 5 Exercise
26.9 Introduction to CSS Lesson
26.9.1 Introduction to CSS 1 Video
26.9.2 Introduction to CSS Quiz 2 Check for Understanding
26.9.3 Styling Your H1s 1 Example
26.9.4 First Style with CSS 5 Exercise
26.9.5 List Styling 5 Exercise
26.10 CSS Select by Tag Lesson
26.10.1 CSS Select by Tag 1 Video
26.10.2 CSS Select by Tag Quiz 1 Check for Understanding
26.10.3 Rainbow 1 Example
26.10.4 Dog Styling 1 Example
26.10.5 Restaurant Menu 5 Exercise
26.10.6 Put Karel Together 5 Exercise
26.11 CSS Select by Class Lesson
26.11.1 CSS Select by Class 1 Video
26.11.2 CSS Select by Class Quiz 1 Check for Understanding
26.11.3 Simple Checkerboard 1 Example
26.11.4 Tic Tac Toe 5 Exercise
26.11.5 Music Library 5 Exercise
26.12 CSS Select by ID Lesson
26.12.1 CSS Select by ID 1 Video
26.12.2 CSS Select by ID Quiz 1 Check for Understanding
26.12.3 Logo 1 Example
26.12.4 Favorite Dog 5 Exercise
26.12.5 Bingo 5 Exercise
26.12.6 CSS Badge 0 Badge
26.13 Web Development Quiz Lesson
26.13.1 Web Development Quiz 15 Unit Quiz
26.14 Practice PT: Your First Website Lesson
26.14.1 About the AP CSP Exam 1 Notes
26.14.2 Set Up Your codehs.me Website 10 Challenge
26.14.3 Practice PT: Your First Website 10 Challenge
26.14.4 Website Badge 0 Badge
Classes and Objects
27.1 Classes and Objects Lesson
27.1.1 Classes and Objects 0 Video
27.1.2 Classes and Objects 1 Check for Understanding
27.1.3 The Point Class 0 Example
27.1.4 The Rectangle Class, Part 1 5 Exercise
27.1.5 The Point Class, Part 2 0 Example
27.1.6 The Rectangle Class, Part 2 5 Exercise
27.2 Methods Lesson
27.2.1 Methods 0 Video
27.2.2 Methods 2 Check for Understanding
27.2.3 The Point Class, Part 3 0 Example
27.2.4 The Point Class, Part 4 0 Example
27.2.5 The Rectangle Class, Part 3 5 Exercise
27.2.6 The Rectangle Class, Part 4 5 Exercise
27.3 Built-In Methods Lesson
27.3.1 Built-In Methods 0 Video
27.3.2 Built-In Methods 2 Check for Understanding
27.3.3 The __repr__ method 0 Example
27.3.4 The __eq__ method 0 Example
27.3.5 The Point Class, Part 5 0 Example
27.3.6 The Rectangle Class, Part 5 5 Exercise
27.3.7 The Rectangle Class, Part 6 5 Exercise
27.3.8 Sheet Music 0 Example
27.3.9 Names In a Hat 10 Challenge
27.4 Operator Overloading Lesson
27.4.1 Operator Overloading 0 Video
27.4.2 Operator Overloading 2 Check for Understanding
27.4.3 The __add__ method 0 Example
27.4.4 The Point Class, Part 6 0 Example
27.4.5 The Rectangle Class, Part 7 0 Exercise
27.4.6 The Rectangle Class, Part 8 0 Exercise
27.4.7 Contact Merge 5 Exercise
27.5 Class Variables vs. Instance Variables Lesson
27.5.1 Class Variables vs. Instance Variables 0 Video
27.5.2 Class Variables vs. Instance Variables 2 Check for Understanding
27.5.3 The Point Class, Part 7 0 Example
27.5.4 The Rectangle Class, Part 9 0 Exercise
27.5.5 Cars 0 Example
27.5.6 Cars, Part 2 5 Exercise
27.5.7 Cars, Part 3 0 Example
27.6 Inheritance Lesson
27.6.1 Inheritance 0 Video
27.6.2 Inheritance 1 Check for Understanding
27.6.3 Animals 0 Example
27.6.4 Food, Part 1 5 Exercise
27.6.5 Animals with Lists 0 Example
27.6.6 Food , Part 2 0 Exercise
27.7 Hidden Attributes Lesson
27.7.1 Hidden Attributes 0 Video
27.7.2 Hidden Attributes 1 Check for Understanding
27.7.3 Secret Instance Variable 0 Example
27.7.4 Only Even Rectangles Counted 0 Exercise
27.7.5 Level Up 0 Example
27.7.6 Triple and Halve 5 Exercise
27.8 Namespaces Lesson
27.8.1 Namespaces 0 Video
27.8.2 Namespaces 1 Check for Understanding
27.8.3 Classes 0 Example
27.8.4 Subclasses 0 Example
27.8.5 Food, Part 3 5 Exercise
27.9 Modules Lesson
27.9.1 Modules 0 Video
27.9.2 Modules 1 Check for Understanding
27.9.3 Importing Entire Module 0 Example
27.9.4 Importing Individual Components 0 Example
27.9.5 Benefits of Individual Importing 0 Free Response
27.9.6 Using the Math Module 0 Exercise
27.10 Unit Quiz Lesson
27.10.1 Classes and Objects Unit Test 19 Unit Quiz
27.10.2 Classes and Objects Badge 0 Badge
Additional Topics
28.1 Short Circuit Evaluation Lesson
28.1.1 Short Circuit Evaluation 0 Video
28.1.2 Short Circuit Evaluation 2 Check for Understanding
28.1.3 Road Trip 0 Example
28.1.4 Divisibility 5 Exercise
28.1.5 Short Circuit Badge 0 Badge
28.2 De Morgan's Laws Lesson
28.2.1 De Morgan's Laws 0 Video
28.2.2 De Morgan's Laws 2 Check for Understanding
28.2.3 De Morgan's Law for AND 0 Example
28.2.4 De Morgan's Law for OR 0 Example
28.2.5 Amusement Park 5 Exercise
Project: Who Said It?
29.1 Project: Who Said It? Lesson
29.1.1 File I/O 0 Video
29.1.2 File I/O 2 Check for Understanding
29.1.3 Who Said It? Demo 0 Demo
29.1.4 Who Said It? - Part 1 5 Exercise
29.1.5 Who Said It? - Part 2 5 Exercise
29.1.6 Who Said It? - Part 3 5 Exercise
29.1.7 Who Said It? - Part 4 5 Exercise
29.1.8 Who Said It? Badge 0 Badge
Project: Mastermind
30.1 Let's Build Mastermind Lesson
30.1.1 How to Play Mastermind 1 Connection
30.1.2 Mastermind: Demo 1 Demo
30.1.3 Generate Number List 5 Exercise
30.1.4 Get User Guess 5 Exercise
30.1.5 Compare User Guess to List 5 Exercise
30.1.6 Check if User has Won 5 Exercise
30.1.7 Finish the Game! 5 Exercise
Practice PT: Testing 1, 2, 3 ...
31.1 Practice PT: Testing 1, 2, 3 ... Lesson
31.1.1 Introduction 5 Notes
31.1.2 Create Scoring Guidelines 5 Connection
31.1.3 Practice PT: Testing 1, 2, 3 ... 5 Exercise
31.1.4 Reflection 5 Free Response
Practice PT: The Shopping List
32.1 Practice PT: The Shopping List Lesson
32.1.1 Create PT Scoring Guidelines 5 Connection
32.1.2 Practice PT: The Shopping List 10 Challenge
32.1.3 Reflection 5 Free Response
Strings
33.1 Indexing Lesson
33.1.1 Indexing 1 Video
33.1.2 Indexing 2 Check for Understanding
33.1.3 Characters in a String 1 Example
33.1.4 Unit Tests 5 Video
33.1.5 Initials 5 Practice
33.1.6 Sandwich Sandwiches 5 Practice
33.2 Slicing Lesson
33.2.1 Slicing 1 Video
33.2.2 Slicing 3 Check for Understanding
33.2.3 Groups of Characters 1 Example
33.2.4 String Collage 1 Example
33.2.5 Room Names 1 Example
33.2.6 If You're Not First, You're Last 5 Practice
33.2.7 Part 1, Replace a Letter 5 Practice
33.2.8 Part 2, Replace a Letter 5 Practice
33.2.9 Slicing Badge 1 Badge
33.3 Immutability Lesson
33.3.1 Immutability 1 Video
33.3.2 Immutability 2 Check for Understanding
33.3.3 String Immutability 1 Example
33.3.4 Find the Error 5 Exercise
33.4 Strings and For Loops Lesson
33.4.1 Strings and For Loops 1 Video
33.4.2 Strings and For Loops 2 Check for Understanding
33.4.3 The len Function 1 Example
33.4.4 Length of User's Name 5 Practice
33.4.5 String For Loop with Indices 1 Example
33.4.6 String For Loop with Characters 1 Example
33.4.7 Spelling Bee 5 Exercise
33.4.8 Keeping Count 5 Practice
33.5 The in Keyword Lesson
33.5.1 The in Keyword 1 Video
33.5.2 The in Keyword 2 Check for Understanding
33.5.3 Contains a Letter 1 Example
33.5.4 Contains a Substring 1 Example
33.5.5 Contains a Vowel 5 Practice
33.6 String Methods Lesson
33.6.1 String Methods 1 Video
33.6.2 String Methods 2 Check for Understanding
33.6.3 upper and lower 1 Example
33.6.4 ENTHUSIASM! 5 Practice
33.6.5 swapcase 1 Example
33.6.6 strip 1 Example
33.6.7 find 1 Example
33.6.8 What's in a Name? 5 Practice
33.6.9 Part 1, Remove All From String 5 Practice
33.6.10 Part 2, Remove All From String 5 Exercise
33.6.11 Mindset Survey 3 1 Survey
33.7 Strings Quiz Lesson
33.7.1 Strings Quiz 20 Unit Quiz
33.7.2 Strings Badge 1 Badge