ArithmeTick

n. For each incorrect answer, a few seconds are shaved off the clock, whereas more time is added for a correct answer. Operations included in each ArithmeTick game are addition, subtraction, multiplication, and division. There are three levels of difficulty to adapt to your child's individual level. The application interface is very simple and is made up of big buttons, so if your children know a little about how to use a computer, it won't be hard for them to pick this game up.