Knock Knock Jokes for Back to School

180 School JokesElementary School JokesMiddle School Jokes High School JokesTeacher JokesPrincipal Jokes More Back to School Jokes… & Top 10 Back to School Jokes 1st Day of School Knock Knock Jokes: Knock! Knock!… Who is there?… Teddy!… Teddy who?… Teddy...