Because she was the Headmaster! My first submitted joke :)
Underlay! Underlay!
A: To promote off-shore drilling.
Submitting a stool sample.
Headmaster: I've had complaints about you, Johnny, from all your teachers. What have you been doing? Johnny: Nothing, sir. Headmaster: Exactly.
Both have big heads that consist mostly of mouth !
Son: "I was the only one who could answer a question." Mother: "Oh really What was the question Son: "Who threw the eraser at the principal "
He knew that some of them wouldn't miss the blind ...