<p>at exeter (renown and extremely competitive prep school), which has a trimester system, students do 6 trimesters and then take the adanced sequence, which is 2 trimesters, and then for their 9th, they take either ap lang or ap lit, and then the test. but this is arguably the best and most competitive secondary school in the world, and they follow a college/post-college pace in many classes, esp. languages and math.</p>