/johnny
After my dad retired he drove a school bus for a while. At one time he was world’s heavyweight wrestling champion so was not to be taken lightly. Told all the kids he had a spanking machine in the basement of the school. They apparently all believed him because they never misbehaved. Little girls all hugged his neck when they got off the bus and the little boys shook his hand.
When I was in grade school and you misbehaved you got to sit in the corner on a stool with a dunce cap on your head. Very effective particularly because you got a spanking from your parents when you got home.