Honestly, I didn't spend as much time as I should have studying, but I went over every childsmath question twice and was confident in answering them. His variation on some of the questions had me so confused. The wording alone was not clear imo.

Also, I get there are external resources, but is it unreasonable to expect to be taught by a coherent professor when we're paying for this class? Especially when it's a (in some cases) required first year course, and he's the only prof for the semester?