Science!
Erlenmeyer flasks behind a wok in a kitchen cabinet I said in my last post that my kid's "understanding of concepts and facts in multiple areas of science is excellent." Already knowing nearly every fact and concept presented in our district's gifted science classes made those classes boring. The lack of intellectual stimulation meant there was no "hook" to make graphing or writing engaging. When people talk about 2e kids having "spiky" profiles or asynchronous skills, this is the disconnect they're talking about. If plotting points on a graph results in a surprising curve that furthers your understanding of a concept, then it feels worthwhile. Someone who already knows that curve and the concepts behind it will find plotting those points tedious. Practice is more effective when it feels worthwhile. Our family is knowledgeable and science-minded so the kid learned some stuff from casual conversation. The rest, the bulk of it, came from YouTub...