Ha! I remember Mr. Howard who taught maths. He could draw a perfect circle on the board freehand and was a dead-eye shot with a piece of chalk, able to land it perfectly on a kid's head if they weren't paying attention. Once my mate Jimmy W. nodded off in class and Howard sent the chalk in a slow graceful arc headed right for Jimmy's nose, except that Jimmy yawned big & wide and the chalk went down his throat. And stuck there. Jimmy was gagging & turning different colours while Mr. H. went back to explaining Pythagoras's theorem. When someone eventually said "I think Jimmy's choking, sir!" he made it to Jimmy's desk in three giant strides, turned him over and brought his huge paw down on Jimmy's back, whereupon the chalk flew out along with lunch. As Jimmy regained his senses Mr. H. declared "clean that mess up, lad" and Jimmy dutifully went off to get a mop. None of us thought this was out of order at the time.
In general school gave me tons of "'interesting useless knowledge" but also a life-long curiosity for learning for its own sake. School sports got me fitter and instilled teamwork. Wouldn't want my teenage years over again but I'm grateful for the time spent in the classroom and sports field. Wouldn't have done my nearly 50 years teaching If I didn't think it was an honourable profession.
Jimmy eventually went into theatre and toured the world.