Move Your Cars Please.

It had been snowing for hours when an announcement came over the high school intercom:  "Will the students who are parked on University Drive please move their cars so that we may begin plowing."
Twenty minutes later there was another announcement:  "Will the twelve hundred students who went to move 26 cars please return to class."

Clever Teacher

A high school English teacher reminds her class of tomorrow's final exam. "Now class, I won't tolerate any excuses for you not being there tomorrow. I might consider a nuclear attack or a serious personal injury or illness, or a death in your immediate family, but that's it, no other excuses whatsoever." A smart ass guy in the back of the room raises his hand and asks, "What would you say if tomorrow I said I was suffering from complete and utter sexual exhaustion?" The entire class does its best to stifle their laughter and snickering. When silence is restored, the teacher smiles sympathetically at the student, shakes her head, and sweetly says, "Well, I guess you'd have to write the exam with your other hand."

Six Times

Mr. Perkins, the biology instructor at a posh suburban girl's junior college, said during class, "Miss Smith, would you please name the organ of the human body, which under the appropriate conditions, expands to six times its normal size, and define the conditions."
Miss Smith gasped, then said, "Mr. Perkins, I don't think that is a proper question to ask me. I assure you my parents will hear of this!" With that she sat down red-faced.
Unperturbed, Mr. Perkins called on Miss Johnson and asked the same question.
Miss Johnson, with composure, replied, "The pupil of the eye, in dim light."
"Correct," said Mr. Perkins. "And now, Miss Smith, I have three things to say to you. One, you have not studied your lesson. Two, you have a dirty mind. And three, you will some day be faced with a dreadful disappointment."