The classes taught by the teacher are the kind that makes most students switch out. Get a study group. You cannot possibly get every homework question done every week, theres too much, but always tries the last question of each block assigned (the hardest one). The tests are very often modified versions of the easiest homework questions with one of the hard ones. The teacher has a VERY clear marking plan while she works, so you should tailor the way you work to match it.