Teacher : Which is the oldest animal?
Student : The zebra.
Teacher : How come?
Student : Because it's still in black & white.
Teacher: "Class, in this final exam, everybody should get at least 75% marks."
Student: "We are all trying for 100% sir!"
Teacher: "Are you being serious?"
Student: "Well, no sir. But it was you who cracked a joke first."
Johnny: Teacher, can I go to the bathroom?
Teacher: Johnny, MAY I go to the bathroom?
Little Johnny: Okay, but I asked first!