This program presents your choice of addition, subtraction, multiplication, and division equations in four levels of increasing difficulty. All the numbers from 0 to 12 are practiced. Time affects the score. When players become proficient at a level they advance. Pass all four levels to win. Then do it again. The passing rate adjusts to you--meaning it get harder as you progress. Compare high scores with your friends. A little time pressure and friendly competition drives success. Now is the time to insure success in higher math. Calculus is easy, once you get past the algebra. And algebra is easy, once you have the basic arithmetic skills down. This is a great way to master basic math skills.Version 1.33 fixed a bug in the new file loading code implemented to replace serialization.