Also, wanted to point out that all the people around me who did great on the SAT used only the prep books - none took one of those dedicated classes. Right or wrong, we all thought tutors and tutoring institutes were for struggling students - because none of the top students utilized them. The notion of a great student becoming even better with the help of a tutor was foreign to us. It was only years later did I learn that tutors for top students existed (basically dedicated 1:1 instruction by a "true master").