I am a college & MBA graduate, so I know enough math to be better than dangerous. I signed up my twins for dreambox's k-3 math, which is supposedly personalized to both of them. First of all the company required a credit card for a "free trial" (huh?) -- that should have been a warning sign itself. Then they actually charged my credit card!!! Worse of all, the math just confused and frustrated my twins. It was a game that wasn't very fun :-( read full review »