Calculator Mania Author:Planet Dexter editors A favorite with teachers, parents, and kids! Now better than ever, with a calculator that REALLY WORKS!!! Calculator Mania! is a very sneaky book. It presents fun games and tricks kids can learn with their calculator, the kind of stuff that's so neat they'll race to share it with friends and family. At the same time it teaches some pretty... more » astounding facts about numbers and the principles about math.« less