Who is studying today?
Type your secret code.
Tap a day to see what you have.
Take your time. You can look at it again later.
Pick a table. Green means you own it. No clock: take your time.
Every square is one fact. Fill it with green!
3 × 7 and 7 × 3 are the same fact, so they turn green together. A fact turns green when you get it right on 3 different days.