This thread is interesting!
My additions:
Our 5th grade male teacher loved to comment about and took great interest in the physical development of his female students...ick. He could be distracted from giving a test if the boys brought up spying on the high schoolers who 'got busy' at the local reservoir. The teacher would ask very specific detailed questions about what the boys saw when they spied. I don't think any of us thought to tell someone.
I had a chem teacher who meant well but all he did was keep telling us how hard he worked at making overhead projector sheets for us (it's how he lectured). It was weird. He got ill and for months we had a parade of subs, none of which knew anything about chemistry.
dh also had a violent band director who threw stands etc and even threw dh's instrument across the room once. dh saw him as an adult and this guy told him "I always hated how talented you were". :huh:
My best teacher was my french teacher. One of the guys in our upper level class loved to write song lyrics on the chalkboard (in English). One day he was writing out "My girl"...our teacher started humming, then singing and we all joined in, some doing backing vocals all of us dancing...it was the closest I've ever come to living in a musical.