Your PE comment also reminded me in PE no one ever explained the rules to netball, basketball, hockey etc but everyone seemed to know what they were doing so I was constantly shouted at for breaking the rules
I was having just this conversation with DP the other day! We went to the same secondary school but several years apart. He was saying how great x and y PE teachers were, and I said they were awful, never actually taught us anything, just expected everyone to know the rules. He was in the county team for hockey, and had been taught all the rules at primary school. I always played GD in netball, I was shit at it, but I knew I was only allowed in the semi circle and I didn't have to worry about if I was 'travelling' with the ball or whatever it is, because no matter what I did I got yelled at.
Hockey they taught us how to use the stick, ball control etc, but not what the rules of the game are?! Then yelled at everyone all the time when we broke the mysterious rules. Surely there's a point where you think 'hang on, none of these 30 kids know what the fuck they're doing, perhaps they don't know the rules?' rather than they're all trying to cheat on purpose?!
And bloody gym - climb the rope. Sorry, what? How? I just used to jump a bit, grab on, and dangle for a few seconds. So did everyone else. I've still got no idea how you climb a rope (or indeed, why I'd want to!) other classes sometimes you'd see a kid climb all the way to the top, like magic.
So very weird that they didn't actually teach us anything. The main concern seemed to be forcing us to go in the communal shower.