Whether you're studying for the SAT or the MCAT, Kaplan Test Center has instructors who'll help you study for the test. I took Kaplan for GMAT and I bought the class wasn't very helpful. It might be a better idea to just buy the Kaplan book because they'll just repeat what's in the book and since they're on a time schedule, they're rarely available to help you after class. You're better off saving yourself over thousand dollars.
Buy books from Kaplan, Princeton Review, and other prep books and study on your own.