Since I posted the mouse video earlier, it is only fitting that I talk about Math Cats now.
Math Cats is a website full of short math activities and math games. The activities and games are based on word problems. What is nice about the games is that they are fairly straight-forward and easy for students to self-start. The wide range of games and activities make Math Cats a good resource for teachers trying to differentiate instruction. Math Cats is appropriate for students in elementary and lower middle school grades.