Here are a few jokes to get you laughing.

In what school do you learn how to greet people?
High School!

Teacher: Lee, I hope I didn't see you copying from David's work!
Pupil: So do I!

The class was on a field study trip to the countryside. "That's a nice cow," said Julia. "That's a Jersey," said the teacher. "Oh," said Julie, "I thought that was its skin!"

Teacher: Jane, why do you have such a problem with decimals?
Jane: I just can't see the point, Miss!