I studied General Science under a very successful HS football coach. I’m not gonna pretend he was the best academic teacher in the school, but he wasn’t the worst, either. The worst was pretty much the opposite of him, in the sense that he was undisciplined and therefore a poor disciplinarian. The football coach intimidated everyone just by walking in the room - and therefore ran a perfectly calm, well-behaved classroom.
In running the movie projectors. Teaching? Meh.
Ironically, the football coaches who taught were so lackadaisical - as opposed to disciplinarians - that the classes were a total joke.
I transferred.