Please enable JavaScript to use CodeHS


1. Digital Citizenship and Cyber Hygiene
1.1 Welcome to Introduction to Software Technology!
Notes 1.1.1 Course Introduction
Free Response 1.1.2 Course Goals
1.2 Digital Footprint and Reputation
Video 1.2.1 Digital Footprint and Reputation
Check for Understanding 1.2.2 Digital Footprint and Reputation
Free Response 1.2.3 Building a Positive Digital Footprint
Connection 1.2.4 Right to be Forgotten?
Free Response 1.2.5 Right to be Forgotten
Free Response 1.2.6 What is your Digital Footprint?
Example 1.2.7 Social Media Clean-up
1.3 Privacy & Security
Video 1.3.1 What is Data Privacy & Security?
Check for Understanding 1.3.2 Privacy & Security Quiz
Connection 1.3.3 How Strong is your Password?
Free Response 1.3.4 How Strong is your password?
Example 1.3.5 Guess: Password List
Example 1.3.6 Guess: Using an Algorithm
Example 1.3.7 Guess: Brute Force
Connection 1.3.8 Google Privacy Policy Search
Free Response 1.3.9 Google Privacy Policy Search
Resource 1.3.10 Is Your Head in the Cloud?
Example 1.3.11 You Can Be Tracked!
1.4 Creative Credit & Copyright
Video 1.4.1 Creative Credit and Copyright
Check for Understanding 1.4.2 Creative Credit and Copyright
Free Response 1.4.3 Cite!
Connection 1.4.4 Exploring Creative Commons
Free Response 1.4.5 Respond: Creative Commons
Free Response 1.4.6 Finding Images
Free Response 1.4.7 Reflection: Why is Copyright Important?
1.5 Hacking Ethics
Video 1.5.1 Hacking Ethics & Legality
Check for Understanding 1.5.2 Hacking Ethics & Legality
Connection 1.5.3 Penetration Testing
Free Response 1.5.4 Reflection: Penetration Testing
Connection 1.5.5 Hack the Pentagon?
Free Response 1.5.6 Reflection: Hack the Pentagon
Check for Understanding 1.5.7 Ethical Hacker Agreement
1.6 Common Security Problems
Video 1.6.1 Common Security Problems
Check for Understanding 1.6.2 Common Security Problems
Connection 1.6.3 Meet Security Engineers at Google
Free Response 1.6.4 Security Engineering Reflection
Video 1.6.5 Living in a Digital World
Free Response 1.6.6 Living in a Digital World
1.7 Digital Citizenship and Cybersecurity Quiz
Unit Quiz 1.7.1 Digital Citizenship and Cyber Hygiene Quiz
2. Programming With Karel
2.1 Introduction to Programming With Karel
Video 2.1.1 Introduction to Programming With Karel
Check for Understanding 2.1.2 Quiz: Karel Commands
Example 2.1.3 Our First Karel Program
Exercise 2.1.4 Your First Karel Program
Exercise 2.1.5 Short Stack
2.2 More Basic Karel
Video 2.2.1 More Basic Karel
Check for Understanding 2.2.2 More Basic Karel Quiz
Example 2.2.3 Tennis Ball Square
Exercise 2.2.4 Make a Tower
Exercise 2.2.5 Pyramid of Karel
Resource 2.2.6 Troubleshooting Strategies
2.3 Karel Can't Turn Right
Video 2.3.1 Karel Can't Turn Right
Check for Understanding 2.3.2 Karel Can't Turn Right Quiz
Example 2.3.3 Tower and Turn Right
Exercise 2.3.4 Slide Karel
Exercise 2.3.5 Fireman Karel
Badge 2.3.6 Karel Turns Right Badge
2.4 Functions in Karel
Video 2.4.1 Functions in Karel
Check for Understanding 2.4.2 Functions in Karel Quiz
Example 2.4.3 Turn Around
Exercise 2.4.4 Pancakes
Exercise 2.4.5 Mario Karel
2.5 The Start Function
Video 2.5.1 The Start Function
Check for Understanding 2.5.2 The Start Function Quiz
Example 2.5.3 Tower with Start Function
Exercise 2.5.4 Pancakes with Start
2.6 Top Down Design and Decomposition in Karel
Video 2.6.1 Top Down Design and Decomposition in Karel
Check for Understanding 2.6.2 Top Down Design and Decomposition Quiz
Example 2.6.3 Hurdle Karel
Exercise 2.6.4 The Two Towers
2.7 Commenting Your Code
Video 2.7.1 Commenting Your Code
Check for Understanding 2.7.2 Commenting Your Code Quiz
Example 2.7.3 Hurdle Karel
Exercise 2.7.4 The Two Towers + Comments
2.8 Abstraction
Video 2.8.1 Abstraction
Quiz 2.8.2 Abstraction Quiz
Example 2.8.3 Abstracting Away buildTower
Free Response 2.8.4 Abstracting Your Day
Free Response 2.8.5 Reflection: Abstraction
Free Response 2.8.6 Abstraction in Karel
2.9 Super Karel
Video 2.9.1 Super Karel
Check for Understanding 2.9.2 Super Karel Quiz
Example 2.9.3 Hurdle Karel (with SuperKarel)
Exercise 2.9.4 The Two Towers + SuperKarel
Badge 2.9.5 Super Karel Badge
2.10 For Loops
Video 2.10.1 For Loops
Check for Understanding 2.10.2 For Loops Quiz
Example 2.10.3 Repeated Move
Example 2.10.4 Put Down Tennis Balls
Exercise 2.10.5 Take 'em All
Exercise 2.10.6 Dizzy Karel
Exercise 2.10.7 Ball in Each Corner
Exercise 2.10.8 Lots of Hurdles
2.11 If Statements
Video 2.11.1 If Statements
Check for Understanding 2.11.2 If Statements Quiz
Example 2.11.3 If Statements
Example 2.11.4 Safe Take Ball
Exercise 2.11.5 Is There a Ball?
Exercise 2.11.6 Don't Crash!
2.12 If/Else Statements
Video 2.12.1 If/Else Statements
Check for Understanding 2.12.2 If/Else Statements Quiz
Example 2.12.3 If/Else Statements
Example 2.12.4 Opposite Day
Exercise 2.12.5 Right Side Up
Exercise 2.12.6 Right vs. Left Square
Badge 2.12.7 Conditional Karel Badge
2.13 While Loops in Karel
Video 2.13.1 While Loops in Karel
Check for Understanding 2.13.2 While Loops in Karel Quiz
Example 2.13.3 Move to Wall
Exercise 2.13.4 Follow The Yellow Ball Road
Exercise 2.13.5 Lay Row of Tennis Balls
Exercise 2.13.6 Big Tower
2.14 Control Structures Example
Video 2.14.1 Control Structures Example
Check for Understanding 2.14.2 Control Structures Example Quiz
Example 2.14.3 Cleanup Karel
Exercise 2.14.4 Random Hurdles
Survey 2.14.5 Mindset Survey 1
2.15 More Karel Examples and Testing
Video 2.15.1 More Karel Examples and Testing
Check for Understanding 2.15.2 Quiz: Which Control Structure?
Example 2.15.3 Move Tennis Ball Stack
Example 2.15.4 Climbing Karel
2.16 How to Indent Your Code
Video 2.16.1 How to Indent Your Code
Check for Understanding 2.16.2 How to Indent Your Code Quiz
Example 2.16.3 Dance and Clean Karel
Exercise 2.16.4 Diagonal
Exercise 2.16.5 Staircase
Badge 2.16.6 Karel Exercises Badge
2.17 Debugging Strategies
Video 2.17.1 Debugging Basics
Check for Understanding 2.17.2 Debugging Basics
Debugging 2.17.3 Debug: The Two Towers
Debugging 2.17.4 Debug: Lots of Hurdles
Video 2.17.5 Debugging From Error Messages
Check for Understanding 2.17.6 Debugging with Error Messages
Debugging 2.17.7 Debug: Big Tower
Debugging 2.17.8 Debug: Random Hurdles
2.18 Programming with Karel Quiz
Unit Quiz 2.18.1 Programming with Karel Quiz
3. Karel Challenges
3.1 Collaborative Programming
Video 3.1.1 Pair-Programming
Check for Understanding 3.1.2 Pair-Programming
Connection 3.1.3 Why Practice Pair-Programming?
Free Response 3.1.4 Pair-Programming Reflection
3.2 Challenge Problems
Challenge 3.2.1 Fetch
Challenge 3.2.2 Racing Karel
Challenge 3.2.3 Tower Builder
Challenge 3.2.4 Super Cleanup Karel
Challenge 3.2.5 Double Tennis Balls
Badge 3.2.6 Karel Challenges Badge
4. Computing Basics
4.1 Internal Components
Video 4.1.1 Internal Components
Check for Understanding 4.1.2 Internal Components
Connection 4.1.3 Build a Computer
Free Response 4.1.4 Build a Computer
Example 4.1.5 Test Your Brain's RAM!
Free Response 4.1.6 Test Your Brain's RAM! Reflection
Connection 4.1.7 The Machine Instruction Cycle
4.2 Peripheral Devices
Video 4.2.1 Peripheral Devices
Check for Understanding 4.2.2 Peripheral Devices
Free Response 4.2.3 Personalized Peripherals
Free Response 4.2.4 IT Help
Free Response 4.2.5 Your Ideal Computer Setup
4.3 Software vs. Hardware
Video 4.3.1 Software
Check for Understanding 4.3.2 Software Quiz
Connection 4.3.3 Software Explained
Check for Understanding 4.3.4 Hardware Review
Free Response 4.3.5 Hardware vs. Software
Resource 4.3.6 What Do You Suggest?
4.4 File and Folder Management
Connection 4.4.1 File Management, Pt 1
Connection 4.4.2 File Management, Pt 2
Free Response 4.4.3 Organize These Files!
Presentation 4.4.4 Back Up These Files!
4.5 Impact of the Internet
Video 4.5.1 Impact of the Internet
Check for Understanding 4.5.2 Impact of the Internet
Connection 4.5.3 What is the Digital Divide?
Free Response 4.5.4 What is the Digital Divide?
Free Response 4.5.5 Debating Impact - Virtual Classrooms
Connection 4.5.6 A Cafeteria Designed for Me
Free Response 4.5.7 A Cafeteria Designed for Me
Connection 4.5.8 Accessibility
Free Response 4.5.9 Accessibility Tips
Connection 4.5.10 W3C Accessibility Standards
Free Response 4.5.11 Accessibility: Designing for ALL
Connection 4.5.12 Emerging Technology
Resource 4.5.13 Keeping Up with the Tech!
4.6 Future of Computing
Video 4.6.1 Future of Computing
Check for Understanding 4.6.2 Video Quiz
Connection 4.6.3 Using DNA for Storage
Free Response 4.6.4 Class Activity: Advancing Technology
Connection 4.6.5 Pros and Cons of AI
Free Response 4.6.6 AI: Is It a Bad Thing?
4.7 Computing Basics Quiz
Quiz 4.7.1 Computing Basics Quiz
5. Operating Systems and Software
5.1 Operating Systems
Video 5.1.1 Operating Systems
Check for Understanding 5.1.2 Operating Systems Quiz
Example 5.1.3 Detect My OS
Connection 5.1.4 Upgrading a Mac OS
Example 5.1.5 Windows OS Installation Simulation
Free Response 5.1.6 Installing an OS
5.2 Comparing Operating Systems
Video 5.2.1 Comparing Operating Systems
Check for Understanding 5.2.2 Comparing Operating Systems Quiz
Example 5.2.3 Windows Simulation
Example 5.2.4 MacOS Simulation
Connection 5.2.5 Choose a Linux Distro!
Free Response 5.2.6 Which would you choose?
5.3 Compatibility
Video 5.3.1 Compatibility
Check for Understanding 5.3.2 Compatibility Quiz
Example 5.3.3 What Processor? Windows
Example 5.3.4 What Processor? Mac
Free Response 5.3.5 What Processor are you running?
5.4 Software and Applications
Video 5.4.1 Software and Applications
Check for Understanding 5.4.2 Software and Applications Quiz
Example 5.4.3 Spreadsheet Simulation
Example 5.4.4 Messaging Simulation
Example 5.4.5 Kanban Board Simulation
Free Response 5.4.6 Software Simulations
5.5 Software Licenses
Video 5.5.1 Software Licenses
Check for Understanding 5.5.2 Software Licenses Quiz
Free Response 5.5.3 Do I need a Software License?
Free Response 5.5.4 Is This Original?
5.6 Software Development
Video 5.6.1 Development Life Cycle
Check for Understanding 5.6.2 Development Life Cycle
Connection 5.6.3 Scrum Framework
Free Response 5.6.4 SCRUM Response
Connection 5.6.5 Using Flowcharts
Notes 5.6.6 Project: Software Development
Resource 5.6.7 Creating a Plan
5.7 Operating Systems and Software Quiz
Unit Quiz 5.7.1 Operating Systems and Software Quiz
6. Project: IT Professional
6.1 Communication is Key!
Notes 6.1.1 IT Professional
Free Response 6.1.2 Cybersecurity Careers
Connection 6.1.3 Customer Service Skills
Free Response 6.1.4 Customer Service Skills
Free Response 6.1.5 Act it Out!
6.2 Building a Knowledge Base
Connection 6.2.1 What is a Knowledge Base?
Free Response 6.2.2 Draft a KB Article
Free Response 6.2.3 Share your KB Article
Free Response 6.2.4 Finalize your KB Article
6.3 Star in a Video!
Connection 6.3.1 Instructional Videos
Connection 6.3.2 Example Tutorial
Free Response 6.3.3 Instructional Video Plan
Free Response 6.3.4 Write the Script
Free Response 6.3.5 Create the Storyboard
Free Response 6.3.6 Record Your Video
6.4 Keeping a Database
Video 6.4.1 Databases
Check for Understanding 6.4.2 Databases
Free Response 6.4.3 Personally Identifiable Information (PII)
Connection 6.4.4 FERPA
Notes 6.4.5 What is SQL?
Video 6.4.6 How to Structure Data in SQL
Check for Understanding 6.4.7 How to Structure Data in SQL
Example 6.4.8 SQL Table: Tiktok
Example 6.4.9 Customer List
7. Web Design - HTML
7.1 Introduction to HTML
Video 7.1.1 Introduction to HTML
Check for Understanding 7.1.2 Introduction to HTML Quiz
Example 7.1.3 Our First HTML Page
Exercise 7.1.4 Say Hello!
7.2 Structure of an HTML Page
Video 7.2.1 Structure of an HTML Page
Check for Understanding 7.2.2 Structure of an HTML Page Quiz
Example 7.2.3 HTML Template
Example 7.2.4 Hello World Page
Exercise 7.2.5 The <title> Tag
Exercise 7.2.6 Your First HTML Page
7.3 Formatting Text
Video 7.3.1 Formatting Text
Check for Understanding 7.3.2 Formatting Text Quiz
Example 7.3.3 Dictionary
Exercise 7.3.4 Word Definitions
Exercise 7.3.5 Pet Names
Exercise 7.3.6 Call of the Wild
Badge 7.3.7 Formatting Badge
7.4 Links
Video 7.4.1 Links
Check for Understanding 7.4.2 Links Quiz
Example 7.4.3 The <a> Tag
Exercise 7.4.4 Bookmarks
Exercise 7.4.5 Encyclopedias
7.5 Images
Video 7.5.1 Images
Check for Understanding 7.5.2 Images Quiz
Example 7.5.3 The <img> Tag
Example 7.5.4 Building the CodeHS Homepage
Exercise 7.5.5 Collage on a Theme
Exercise 7.5.6 Linking an Image
Exercise 7.5.7 National Parks
7.6 HTML Lists
Video 7.6.1 HTML Lists
Check for Understanding 7.6.2 HTML Lists Quiz
Example 7.6.3 Grocery Shopping
Exercise 7.6.4 Class Planning
Exercise 7.6.5 Dream Destinations
Exercise 7.6.6 Vacation Guides
7.7 HTML Tables
Video 7.7.1 HTML Tables
Check for Understanding 7.7.2 HTML Tables Quiz
Example 7.7.3 Address Book
Exercise 7.7.4 National Sports
Exercise 7.7.5 Table of Favorites
7.8 HTML Styling
Video 7.8.1 HTML Styling
Check for Understanding 7.8.2 HTML Styling Quiz
Example 7.8.3 Stylish Address Book
Exercise 7.8.4 Background Colors
Exercise 7.8.5 Style Your Class List
Badge 7.8.6 Styling Badge
7.9 HTML Colors
Video 7.9.1 HTML Colors
Check for Understanding 7.9.2 HTML Colors Quiz
Example 7.9.3 HTML Colors Examples
Exercise 7.9.4 Create Your Own Color
Exercise 7.9.5 Gradients
Connection 7.9.6 Color Wheel
Exercise 7.9.7 Using Good Colors
7.10 HTML - Structuring Websites Quiz
Unit Quiz 7.10.1 HTML - Structuring Websites Quiz
Badge 7.10.2 HTML Badge
8. Web Design - CSS
8.1 Introduction to CSS
Video 8.1.1 Introduction to CSS
Check for Understanding 8.1.2 Introduction to CSS Quiz
Example 8.1.3 Styling your H1s
Exercise 8.1.4 First style with CSS
Exercise 8.1.5 List Styling
Exercise 8.1.6 Endangered Animals: Skeleton
8.2 CSS Select by Tag
Video 8.2.1 CSS Select by Tag
Check for Understanding 8.2.2 CSS Select by Tag Quiz
Example 8.2.3 Rainbow
Example 8.2.4 Puppy Styling
Exercise 8.2.5 Set List
Exercise 8.2.6 Your Appliance Recommendations
Exercise 8.2.7 Endangered Animals: Style the Headers
8.3 CSS Select by Class
Video 8.3.1 CSS Select by Class
Check for Understanding 8.3.2 CSS Select by Class Quiz
Example 8.3.3 Simple Checkerboard
Exercise 8.3.4 Swim Meet
Exercise 8.3.5 Favorite Things
Exercise 8.3.6 Endangered Animals: Add Color Coding
8.4 CSS Select by ID
Video 8.4.1 CSS Select by ID
Check for Understanding 8.4.2 CSS Select by ID Quiz
Example 8.4.3 Logo
Exercise 8.4.4 Must Do Today!
Exercise 8.4.5 Lomeli's Menu
Exercise 8.4.6 Endangered Animals: Add Pictures
Badge 8.4.7 Selector Badge
9. Project - Create Your Homepage
9.1 Homepage: Your First Website
Example 9.1.1 Example Homepage
Connection 9.1.2 Real World Homepage
Challenge 9.1.3 Set Up Your Website
Challenge 9.1.4 Create Your Homepage
Badge 9.1.5 Create Your Homepage Badge
10. JavaScript and Graphics
10.1 What is Programming?
Video 10.1.1 Programming Concepts
Check for Understanding 10.1.2 Programming Concepts Quiz
Connection 10.1.3 Compilers vs. Interpreters
Free Response 10.1.4 Compilers vs. Interpreters
Resource 10.1.5 IDE Scavenger Hunt
Connection 10.1.6 Most Popular Languages
Free Response 10.1.7 Language Table
10.2 Hello World
Video 10.2.1 Hello World
Check for Understanding 10.2.2 Hello World Quiz
Example 10.2.3 Hello World
Exercise 10.2.4 Your Name and Hobby
10.3 Variables
Video 10.3.1 Variables
Check for Understanding 10.3.2 Variables Quiz
Example 10.3.3 Basic Variables
Exercise 10.3.4 Daily Activities
10.4 User Input
Video 10.4.1 User Input
Check for Understanding 10.4.2 User Input Quiz
Example 10.4.3 Basic User Input
Exercise 10.4.4 Dinner Plans
Badge 10.4.5 User Input Badge
10.5 Basic Math in JavaScript
Video 10.5.1 Basic Math in JavaScript
Check for Understanding 10.5.2 Basic Math in JavaScript Quiz
Example 10.5.3 Simple Calculator
Example 10.5.4 Dollars to Pounds
Example 10.5.5 Dividing Up Groups
Exercise 10.5.6 T-Shirt Shop
Exercise 10.5.7 Running Speed
10.6 Using Graphics in JavaScript
Video 10.6.1 Graphics
Check for Understanding 10.6.2 JavaScript Graphics Quiz
Example 10.6.3 Graphics Hello World
Example 10.6.4 Blue Circle
Example 10.6.5 Red Rectangle
Example 10.6.6 8 Ball
Exercise 10.6.7 Flag of the Netherlands
Exercise 10.6.8 Snowman
Badge 10.6.9 Graphics Badge
10.7 JavaScript and Graphics Quiz
Unit Quiz 10.7.1 JavaScript and Graphics Quiz
11. Web Development
11.1 The Script Tag
Video 11.1.1 The Script Tag
Check for Understanding 11.1.2 The Script Tag Quiz
Example 11.1.3 Debugging Functions
Free Response 11.1.4 Using the Console
Exercise 11.1.5 Writing in the Console
Exercise 11.1.6 Alert Introduction
Exercise 11.1.7 Debugging with the Console
11.2 Using the DOM
Video 11.2.1 getElementById
Check for Understanding 11.2.2 getElementById Quiz
Example 11.2.3 Welcome to My Site!
Exercise 11.2.4 Let's Get to Know You
Video 11.2.5 Using the DOM
Check for Understanding 11.2.6 Using the DOM Quiz
Example 11.2.7 Multiple <p> tags
Exercise 11.2.8 Menu Opinion
11.3 Using the jQuery Library
Video 11.3.1 Introduction to jQuery
Check for Understanding 11.3.2 Introduction to jQuery
Example 11.3.3 Using the Selector
Example 11.3.4 jQuery Functions
Connection 11.3.5 Exploring the jQuery Documentation
Free Response 11.3.6 Exploring the jQuery Documentation
Exercise 11.3.7 High School Info
Exercise 11.3.8 Change Paragraph Size
11.4 Collecting and Storing Data
Video 11.4.1 Collecting and Storing Data
Check for Understanding 11.4.2 Collecting and Storing Data
Connection 11.4.3 How Much is Your Data Worth?
Free Response 11.4.4 How Much is Your Data Worth Responses
Example 11.4.5 Does Your Browser Have Local Storage?
Example 11.4.6 Local Storage
Connection 11.4.7 Cookies vs. Local Storage
Free Response 11.4.8 Cookies vs. Local Storage Responses
11.5 Using a CMS
Video 11.5.1 Using a CMS
Check for Understanding 11.5.2 Using a CMS
Connection 11.5.3 How to Choose a CMS
Free Response 11.5.4 How to Choose a CMS
Connection 11.5.5 Comparing CMS Systems
Free Response 11.5.6 Comparing CMS Systems
11.6 Web Development Quiz
Quiz 11.6.1 Web Development Quiz
12. Computer Science Careers
12.1 Computer Science Careers
Video 12.1.1 Computer Science All Around Us
Quiz 12.1.2 Computer Science All Around Us
Connection 12.1.3 CS Careers
Free Response 12.1.4 CS Career Response
Connection 12.1.5 Coding in the Wild
Free Response 12.1.6 Coding in the Wild Response
Connection 12.1.7 Inclusive Coding
Free Response 12.1.8 Inclusive Coding Response
Resource 12.1.9 Career Research
12.2 Create an Online Portfolio
Free Response 12.2.1 Online Repositories
Connection 12.2.2 What is a Resume?
Free Response 12.2.3 What is a Resume?
Notes 12.2.4 Upload Relevant Documents
12.3 Student Organizations
Notes 12.3.1 What Are They?
Free Response 12.3.2 Their Mission
Free Response 12.3.3 Career Development
Free Response 12.3.4 Additional Opportunities
Free Response 12.3.5 Lifelong Lessons