Caught With His Pants Down

(We are in math class. Our teacher uses an overhead projector to teach lessons. Whenever he wants us to listen, he says:)

Teacher: “Everyone drop your pencils! This is important!”

(One day he must have been distracted.)

Teacher: “Okay! Drop your pants!”

(The class erupts in laughter.)

Teacher: “Pencil! I meant PENCIL! Now, don’t go telling your parents…”