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.
Teacher : Hassan, go to the map and find Singapore.
Hassan : Here it is!
Teacher : Correct. Now, class, who discovered Singapore?
Class : Hassan!
Teacher : Rudy, name one important thing we have today that we didn't have ten years ago.
Rudy : Me!
Substitute Teacher : Are you chewing gum?
Billy : No, I'm Billy Nyalau.