This is all a really lovely list. Thank you for your answer. I love Street Fighting Mathematics too, but it's tough even for me. Meaning, it makes sense as I s

This is all a really lovely list. Thank you for your answer. I love Street Fighting Mathematics too, but it's tough even for me. Meaning, it makes sense as I see the explanation, but these techniques of estimation have to be practiced over and over again to feel natural. As for the gravity example, a small game using Scratch was enough to get them to appreciate acceleration, by associating velocity with audio. You intuitively know what a vehicle sounds like when it is maintaining constant speed, vs when it is accelerating or decelerating (negative acceleration) From there it was a small delta to showing horizontal launch velocity but no acceleration, and how you can deal with the x and y components independently, and how a ball automatically traces a quadratic curve.