Cats
Ever heard of a cat who suffered from insomnia??...........Me neither.
water
TEACHER:Donald, what is the chemical formula for water?
DONALD:H I J K L M N O!!
TEACHER:What are you talking about?
DONALD:Yesterday you said it's H to O!
chewing gum
SUBSTITUTE TEACHER: Are you chewing gum?
BILLY: No, I'm Billy Anderson.
homework
HAROLD:Teacher, would you punish me for something I didn't do?
TEACHER: Of course not.
HAROLD: Good, because I didn't do my homework.
kids on school
TEACHER:Why are you late, Frank?
FRANK:Because of the sign.
TEACHER:What sign?
FRANK:The one that says, "School Ahead,Go Slow."