It’s The Archimedes Principle Of The Thing
(My seventh grade Social Studies teacher was known best for two things: his wacky, offbeat sense of humor and his equally wacky ties. He had a gift for getting students interested in learning history, too.This was by far his most notable class opening when I was a student:)
Teacher: “Okay! Who here knows the story of the first recorded streaker in history?”
(And that is how you get twelve-year-olds interested in Archimedes.)