Four teachers. Four little students. One big exam.

Every student starts out knowing nothing, and they all start exactly alike. Each one has to learn the same secret rule: which spots are a “yes” and which are a “no” .

Grab a free desk in the classroom. There are 10 rounds, with 15 lessons in each. Tap anywhere in your student's notebook and the classroom tells it the right answer for that spot. A raised hand means your student is unsure about that spot, and answering those questions often helps the most!

When you're done, press Study time! Your student studies everything you've taught so far and redraws its guess line.

After round 10, every student takes a secret 5,000-question exam. The best student wins , and the top three go on the podium.

A new match starts every few minutes, day and night. If your phone drops out during a match, your student just waits until you're back.

Practise on your own