Oy Vay

Put stones into burlap bags, insert children, tie the bag and drop it into a river. Those who return should get taught and will not be so "excitable."

Honestly. I teach small groups and/or individuals. I have been known to split kids up into "managably sized" small groups and/or send them away altogether. I like well-behaved children who get self-discipline from their parents' teachings...rather than have the parents bring unruly children to me to teach them discipline.