Self-paced lessons

Learn at your own pace

Pick a subject: Python, Scratch, AI, Web or Java. Do the lessons anytime, answer quick quizzes, and earn XP as you go.

26topics

78lessons

1720XP to earn

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Every lesson is free. No sign-up needed to start.

Type real code, run it in your browser and make tiny games.

Snap real Scratch blocks together to build animations and games.

Find out how AI learns, sees and talks, and build simple bots.

Make your own webpages with HTML, CSS and JavaScript.

Read Java code, predict what it does and try it online.