Solve linear equations with one variable!
In your personal highscore you see for every class how well you did. In the online ranking you see you world wide placement. Compete with your friends for the best score!
The statistics section you can see detailed information about how long you need to solve an equation. In the online comparison you can see if you're above the average player.
More classes are planned like remembering a sequence of different numbers, or giving correct change, ...