Two boys were arguing when the teacher

Two boys were arguing when the teacher entered the room.

The teacher says, “Why are you arguing?”

One boy answers, “We found a £10 note and decided to give it to the person who tells the biggest lie.”

“You should be ashamed of yourselves,” said the teacher, “When I was your age, I didn’t even know what a lie was.”

The boys looked at each other then gave the £10 note to the teacher.