Learn by doing

Computer science you can see, play and understand.

Clear, interactive classroom activities that turn big computing ideas into something everyone can explore.

Explore the activities

Classroom resources

Choose an activity

Every activity works in a browser—no download or sign-in needed.

Strategy game

Nim

Explore binary numbers and discover the winning XOR strategy.

Play Nim

Logic puzzle

Towers of Hanoi

See recursion in action and solve the puzzle in the fewest moves.

Try the puzzle

Code-breaking game

Mastermind

Use clues, deduction and careful thinking to crack the hidden code.

Crack the code

Interactive lesson

Build a PC

Meet the parts inside a computer, then build one for a real customer.

Start building

Made for the classroom

Big ideas, made approachable.

These activities are designed for teaching on a large screen and for independent exploration. Instructions are plain, controls are generous, and support is always close at hand.