Who keeps on talking when people are no longer interested?

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TEACHER: Emma, go to the map and find North America.
EMMA: Here it is.
TEACHER: Correct. Now class, who discovered America?
CLASS: Emma

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TEACHER: Joe, why are you doing your math multi-plication on the floor?
JOE: You told me to do it without using tables.

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TEACHER: Margie, how do you spell ‘crocodile?’
MARGIE: ‘K-R-O-K-O-D-I-A-L’.
TEACHER: No, that’s wrong.
MARGIE: Maybe it is wrong, but you asked me how I spell it.

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TEACHER: McCoy, what is the chemical formula for water?
McCoy: H I J K L M N O.
TEACHER: What are you talking about?
McCoy: Yesterday you said it’s H to O.

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TEACHER: Maggie, name one important thing we have today that we didn’t have ten years ago.
MAGGIE: Me!

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TEACHER: Roger, give me a sentence starting with ‘I.’
ROGER: I is…
TEACHER: No, Roger…. Always say, ‘I am.’
ROGER: All right… ‘I am the ninth letter of the alphabet.’

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TEACHER: George Washington not only chopped down his father’s cherry tree, but also admitted it. Now, Tio, do you know why his father didn’t punish him?
TIO: Because lil George still had the axe in his hand.

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TEACHER: Now George, tell me frankly, do you say prayers before eating?
GEORGE: No sir, I don’t have to, my Mom is a good cook.

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TEACHER: Teofilo, your composition on ‘My Dog’ is exactly the same as your brother’s. Did you copy his?
TEOFILO: No, sir. It’s the same dog.

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TEACHER: Charlotte, what do you call a person who keeps on talking when people are no longer interested?
CHARLOTTE: A teacher.