if a student attempts to turn without looking, then grab the control column and stop the turn happening, if too much head in-- a comment of "did you see him?" can help, even if there wasnt anybody there!
and dont teach use of DI to turn onto a track in the circuit, pick a distant point off the wing tip, and roll out on that, its close enough.
read and do the checklist when on the ground, airborne checks should be memorized.