Code Blue
Not for safety, but for learning purposes we have introduced groups of three circuits at a time, then fullstop/backtrack (off the runway). I don't think safety is such a big issue (for us at least) because we're in C152s and the runway is 1200m long, but for learning purposes it's better than showing them one! They have got time to think about what they have just done and a 'bad hair day' can be got rid of in the first group, then some nice flying in the second group.
As for the T+G technique, again the long runway helps. Power completely off for the landing, once the elevator doesn't work any more then you've landed, so flap up/10deg, power then go. Flying the attitude normally doesn't involve much retrimming unless we have just done a glide approach.