Two is the number. Roy Peter Clark is on to something. The “unified theory of writing”combines science and words in a way that strikes me as just right. http://www.poynter.org/how-tos/newsgathering-storytelling/writing-tools/180084/can-we-figure-out-a-unified-theory-of-writing/
This scientist understands the power of a “news peg.” What will people be talking about? Figure that out, and you have a hook for teaching physics, and lots of other things. Add “global warming” and you get lots of hits.
Nathan is Professor Emeritus of Physics at the University of Illinois at Urbana-Champaign. After a long career doing collisions of subatomic particles, he now spends his time studying the collision of ash with cowhide. He maintains an oft-visited website devoted to all things related to the physics of baseball: go.illinois.edu/physicsofbaseball.