It was a biology class I took. Professor took pride in seeing kids drop his class. We went from like 60 to 22 by the end. Dude was like a science nazi. It wasnt about rote memorization for him man. You had to know processes so well you could recreate it. I was gonna drop too after failing the first test, but I buckled down after that hardcore. Came into class with a tape recorder, took notes, revised notes with recorder, walk around with flash cards, etc. I knew photosynthesis and DNA replication so well I could literally visualize each step. Passed with a hard B and personally thanked the professor for being the first teacher to make me learn, instead of memorize.