Among these twenty SAT II exams, which ones should you choose? First of all, it's essential to understand the requirements of the schools you're applying to. Not all American universities require SAT II scores; a significant number of ordinary universities and a few prestigious ones do not require (NOT REQUIRED) SAT II exams. If all the schools you're applying to don't require SAT II scores and your preparation time for TOEFL and SAT I is already tight, then there's no need to take SAT II. However, most prestigious American universities do require SAT II scores, usually two or three subjects.