When I was in 3rd grade, I would say thank you to my teacher when she passed out work. I wasn’t actually thankful for the assignment or anything, I just thought it was polite, and she seemed to appreciate it. Then one day a sub got pissed at me for it. Needless to say, it baffled me.
In the second grade, I had an elderly teacher I think was either losing her marbles or truly someone who shouldn’t be teaching little kids. She would tell the class horrible things like if we were in a car accident and hadn’t gone to the bathroom, our bladders would explode. I’ve mercifully forgotten the rest of her charming lectures. If she had a broomstick in her closet, I wouldn’t have been surprised.