They explain it back, in their own words
Before anything gets turned in, they close the screen and explain the idea out loud, without reading off it. If they can't, they didn't learn it — they just copied it.
They check at least one source
AI is confidently wrong more often than most people realize. A kid who checks one real source before trusting an answer is building judgment. A kid who never checks is just trusting a guess.
They use it to practice, not to finish
Asking AI to quiz them, explain a step, or check their work builds skill. Asking it to just hand over the finished answer skips the part where the learning actually happens.
None of this means less AI. It means noticing which of these three is already happening in your house — and which one isn't yet.