hi I am gonna graduate from High school in 2 weeks from now... my major will be Electrical engineering at Cleveland state university. anyway ,I want a self-study book so that I can build my foundation before starting classes. I will have around 6 months before enrolling in college. I have already bought PreCalculus for dummies,what do you think about it? are there any better books out there? what about Community college classes ,do you think that is a better idea than buying a book? if I want to take Pre-calc classes at CC ,how many hours should I expect?