Sister Mary Catherine, AKA Sr Mary Thwakem, everyone in her class got the ruler at some point, she had a special thick wooden metre stick for in class and walked around with a small ruler at other times.
She accused a boy of writing in a text book, he denied it so he got the ruler, the same thing happened the next day, and the day after. After 2 weeks the boy who did do the writing owned up.
At secondary an English teacher, he was dirty, smelly and a letch. You could tell he got his rocks off making girls read certain passages of books.
One of the other English teachers was lovely but had a mental breakdown. When she came back he decided she wouldn't be able to teach the top set so he put the top set and the second set together.
Nice English teacher was explaining to the class why they were not going to be taught by her when he walked in and basically gave her a telling off and told the class to move. I wasn't in the nice teacher's class but I know the students who were thought his behaviour was terrible.