Low, medium, high heat and what each is for. Electric flattop — residual heat, preheating, why you move pans before it's too late. The Maillard reaction — that's what brown and delicious means. Boiling vs simmering vs poaching.
Practice Task
Boil water, bring it to a simmer, then a bare simmer. Hold each for 60 seconds. Learn what each looks like.