Taking SAT Subject Tests and AP Tests

Why do students take the SAT Subject Tests and AP Exams? -- Puzzled
Answer: One reason students take one or more SAT Subject Tests is because some colleges require them. Another reason is that high scores on these tests and the AP Exams are an opportunity for students to distinguish themselves from others applying for admission. In addition, high scores on these tests may let students place out of introductory courses and/or receive academic credit for them. Doing well on these tests can be a big money-saver, with some students able to enter college with a sophomore standing. Furthermore, high scores can give students a leg up when applying for scholarships.
The SAT Subject Tests are the only national admission tests that measure students' knowledge, skills and ability to use that knowledge in a particular subject area. The tests are very closely linked to high-school curriculum and are highly reliable and an objective assessment of student ability to perform at a college level in the tested content area. There are 20 SAT Subjects Tests in five general subject areas (English, history, languages, mathematics and science). The tests are given on several dates.
Most students who take the AP Exams have taken AP courses. The exams are a standardized measure of what students have learned in their AP classrooms. AP offers 34 courses in a wide variety of subject areas. Taking the AP Exam is an important part of taking an AP course. These tests are given yearly in May and are usually taken after completing an AP course.
You can learn all about both tests on the College Board website (collegeboard.org).