High school is a lot of work, yes, college grades are usually upwards of 75% exams, and less than 25% hw, in class shit, labs, or w/e. For example, my current chem class is 2 25% midterms, 1 35% final, and 5% hw, 5% labs, and 5% participation. So yea, college is very exam-biased except for the retard classes like... english. lol