School jokes are based on the interaction between teacher and students as well as amongst students themselves. Jokes are mostly are situated in school, university or dormitories.
Heading off to college at the age of 40, I was a bit self-conscious about my advancing years. One morning I complained to my husband that I was the oldest student in my class. "Even the teacher is younger than I am," I said. "Yeah," he said optimistically, "but look at it from my point of view. I thought my days of fooling around with college girls were over!"
Teacher: Tell me a sentence that starts with an "I".
Student: I is the...
Teacher: Stop! Never put 'is' after an "I". Always put 'am' after an "I".
Student: OK. I am the ninth letter of the alphabet.
TEACHER: Well, at least there's one thing I can say about your son.
FATHER: What's that?
TEACHER: With grades like these, he couldn't be cheating.