"I'm afraid you haven't been going to school long enough to have an educated guess."

"But I'm just trying to offer a fresh point of view."

"Don't you dare fly that airplane in this classroom."

"Ben Franklin may have discovered electricity, but it was the guy who invented the electric meter who made all the money."

"Are you sure your regular teacher never tries to teach you anything?"

"Aren't you worried you might be lowering my self-esteem?"

"Please keep in mind that 'whatever' is never accepted as an answer to a question."