Teacher: Little Johnny, go to the map and find North America.
Little Johnny: Here it is!
Teacher: Correct. Now, class, who discovered America?
Class: Little Johnny!
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Teacher: How can one person make so many stupid mistakes in one day?
Little Johnny: I get up early.
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Teacher: Didn't you promise to behave?
Little Johnny: Yes, sir.
Teacher: And didn't I promise to punish you if you didn't?
Little Johnny: Yes, sir, but since I broke my promise, you don't have to keep yours.
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Teacher: Why are you late?
Little Johnny: Because of the sign.
Teacher: What sign?
Little Johnny: The one that says, "School Ahead, Go Slow". That's what I did.
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Teacher: I hope I didn't see you looking at Don's paper.
Little Johnny: I hope you didn't either.