I think that high school exams are clearly easier than college exams. High school teachers give a lot more tests, but they are usually fairly easy as long as you pay attention in class. Where as the college exams occur less often but cover a lot more material. High school teachers give reviews that are practically the test, but it's not like that in college. There is no sure way to know what the test will look like, so you have to study everything to be safe.You could prepare for high school tests by doing the review. However, to prepare for the college exams you should try to make sure you know a bit of everything you have covered in that course so far.