An Advanced Placement (AP) exam is a test that covers one of 38 academic subjects, which students can take starting in 9th or 10th grade. Students who take AP courses in school and then take the corresponding exams can earn college credits while still in high school. To take the exam, you must register between May and November.
While you don’t have to take the exam after an AP course, you could get extra credit if you do. You can also send your scores on college applications, which can boost your chances of being accepted if you do well.