You did it as I always thought it should be done. Not that what I think matters, but it seems like the best, most logical approach.
Well done.
Thank you. I think that one thing that worked real well was that when I went around the room at the beginning of class and "spot checked" two or so answers on each paper, everyone got attention. The ones who are ignored in the classroom setting are the B or C students who don't cause any trouble. Just being noticed on an equal footing with their more flamboyant peers seems to help. It helped the students who weren't doing well because I wasn't judging them by something they couldn't get right until they knew how to do it.
Sometimes (well, most of the time) I got the feeling that a big part of the job of schools is figuring out who will be the gammas and deltas. (Brave New World reference).