From the back of a pizza box, shortened:

"The CEO says to the teacher: 'Teaching. Ha. What sort of a person becomes a teacher, thinks their best option in life is to teach. Pathetic. You're a teacher, so tell me, What do you make?"
"The teacher to the CEO: 'I make students sit up in class, make them pay attention when they don't want to, make them achieve more than they thought possible etc, etc. In short, I make a difference.'"