Free for everyone · ages 8 to 14 · parents and teachers welcome
Learn it in 10 minutes. Live it offline.
See how computers think: sorting, searching, mazes and the math behind them, one step at a time. Then switch off the screen and try it for real with cards, paper, or your family.
- WatchSee the algorithm move, one step at a time.
- PredictGuess each step before it happens. Your brain does the work, not the screen.
- Go offlineDo the same thing with real objects. That's where it sticks.
Lessons
Each lesson takes about ten minutes on screen and ends with something to do away from it. Start anywhere.
- Sorting Bubble, selection, insertion, merge and quick sort. Offline: sort a hand of playing cards
- Searching Linear search and binary search: why halving wins. Offline: Guess My Number
- Mazes and maps Queues, stacks, and two ways to search a graph. Offline: draw a ripple map
- Math algorithms The Sieve of Eratosthenes and Euclid's GCD. Offline: cut squares from a sheet of paper
Coming next
- TreesOffline: draw your family tree and find anyone in a few steps.
- RecursionOffline: the Tower of Hanoi with three coins and three plates.
- Shortest pathsOffline: map your neighbourhood and time the quickest walk to school.
- HashingOffline: sort the post into pigeonholes by the first letter.
For teachers
Every lesson fits a 40-minute class with one screen at the front of the room.
- 10 minutes, together on screen. Turn on Predict mode and let the class vote on each answer before you click.
- 25 minutes, in groups, off screen. Print the activity card. Each group needs only cards, coins or paper.
- 5 minutes, back together. Compare tally counts with the computer's. Discuss the "Think about it" question.
Works anywhere
- No sign-up, for you or your students.
- Runs in any modern browser, on old laptops and phones.
- Every activity prints on one page, black on white.
- Free for every school, in every country.
For parents and grown-ups
Children growing up with AI will get answers instantly. What they need is the habit of thinking a problem through step by step, guessing, and checking. VisuaLearn uses the screen for the minimum it takes to show an idea, then sends them off it.
- Free for everyone. No ads, no accounts, no tracking.
- No streaks, badges, points or notifications built to pull them back.
- No autoplay: a lesson never rolls straight into the next one.
- Every lesson ends with something to do away from the screen.
- A daily time limit, counted on this device only.
The limit covers every lesson. When time is up, the lesson pauses and suggests the offline activity. Children can add five minutes twice a day. The setting is saved in this browser and nowhere else.