Funnypedia

N 5: Joke about school, little johnny, teacher wordplay
Teacher: "Johnny, what is the outside of a tree called?"
Johnny: "I don't know."
Teacher: "Bark, Johnny, bark."
Johnny: "Bow, wow, wow!" N 4: Joke about little johnny and teacher
Little Johnny's teacher said,
"Johnny, your essay on My Dog is exactly the same as your sister's."
Did you copy hers?, she asked.
Johnny replied, "No, teacher, it's the same dog!" N 3: Joke about school, little johnny and teacher
A teacher is teaching a class and she sees that Johnny isn't paying attention, so she asks him, "If there are three ducks sitting on a fence, and you shoot one, how many are left?" Johnny says, "None." The teacher asks, "Why?" Johnny says, "Because the shot scared them all off." The teacher says, "No, two, but I like how you're thinking." Johnny asks the teacher, "If you see three women walking out of an ice cream parlor, one is licking her ice cream, one is sucking her ice cream, and one is biting her ice cream, which one is married?" The teacher says, "The one sucking her ice cream." Johnny says, "No, the one with the wedding ring, but I like how you're thinking!" N 2: Joke about school, little johnny, teacher vulgar
The teacher brings a statue of Venus into class and asks, "What do you like best about it, class? Let's start with you, Robert."
"The artwork," says Robert.
"Very good. And you, Peter?"
"Her tits!" says Peter.
"Peter, get out! Go stand in the hall," responds the teacher with disgust. "And you, Johnny?"
"I'm leaving, teacher, I'm leaving..." N 1: Joke about school, sleeping, little johnny and teacher
Teacher: Johnny, you know you can't sleep in my class.
Johnny: I know. But maybe if you were just a little quieter, I could.