Comment by wedn3sday
Amusingly I had the exact inverse of this experience. My senior year I signed up for the AP Bio course, but we only got 22 students signed up out of the 25 required to allow the class to happen (a very stupid system in of itself). Because the class was canceled, and the very competent well educated biology teacher had a slot free in his schedule, he was forced into teaching the gym class (which I also had to take since I'd been avoiding PE for the last few years). He knew the situation, and after the first week handed me the advanced bio textbook after class one day, and then turned a blind eye to me sitting on the bleachers reading instead of running laps for the rest of the semester (dont come at me for physical fitness, I was a skateboarder and in better shape than 90% of the kids already).