I’m not sure it it’s something high-schoolers need to know, though I’ll confess that I would have liked to have known about the concept of the zero-sum game as an adolescent. There is a Cultural Literacy worksheet under that hyperlink on the zero-sum game.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.