1. TEACHER: George, go to the map and find North America.
GEORGE: Here it is!
TEACHER: Correct. Now, class, who discovered America?
CLASS: George!
2. TEACHER: Ellen, give me a sentence starting with "I".
ELLEN: I is...
TEACHER: No, Ellen. We always say, "I am."
ELLEN: All right... "I am the ninth letter of the alphabet."
3. TEACHER: If I had seven oranges in one hand and eight oranges in the other, what would I have?
CLASS: Big hands!
4. TEACHER: Didn't you promise to behave?
STUDENT: Yes, Sir.
TEACHER: And didn't I promise to punish you if you didn't?
STUDENT: Yes, Sir, but since I broke my promise, I don't expect you to keep yours.
5. TEACHER: In this box, I have a 10-feet snake.
SAMMY: You can't fool me, Teacher... snakes don't have feet.
挺逗的...... 
It's very funny. 
还好 
星星点点 