Students of Reddit, what's the story of the worst teacher you've ever had?

My highschool math teacher was the worst! He taught in my mini program and I was stuck with him for 3 years. He would sort everyone's grades in order and call them out from the best student to the worst with every test we did. He would make fun of the students who did poorly instead of encouraging them. There was a time where my grades slipped when I was evidently being bullied by others in the class. He called me in afterschool to tell me he thinks my poor grades were due to being a social butterfly! It wasn't until I was sobbing that he tried to make me feel better by letting me know that at least I wasn't the last in class, just second last.

/r/AskReddit Thread