Generally, outside of some relatively garbage introductory classes, I found that my classes either required 2-3 papers or projects, a midterm exam and a final, or some combination of the above. The more bullshit courses, generally with the shittier professors, would impose a "class participation" component of between 5-10%, and do other garbage like clicker-based quizzes during lectures to try to get people to actually come to class, instead of just doing the reading, when exams were not scheduled.