[aethertap]

I've only been actively teaching (at home, no less) for a couple of years, but I can definitely identify with this. I make index cards with each kind of question we encounter in the curriculum, then I draw some random cards from the deck in order to pick questions going all the way back to the start. We do a quiz every week for every subject that's made up of those questions.

It always comes down to time though, it seems like you can use all these ideas and teach for mastery, but it costs about 30% in terms of forward motion through the material. I'm lucky in that that I can just decide to pay that price, but it would be a real stretch to put all this into practice in a place where you have a coverage deadline that's already hard to hit.