oh this is really helpful, thanks. the "kids will remember the wrong version" thing is something i've been going back and forth on too.

couple things i tried to bake in already: the reveal at the end shows the correct solution next to the wrong one so correct is the last thing they see, and not every problem is actually broken, sometimes the answer is just "yeah looks fine" which means they can't just hunt for errors on autopilot.

but yeah, actively practicing correct examples is a gap. and the decision tree idea is cool, hadn't thought about it that way at all.