Turn crosswind at 500', level at circuit height
The problem with this is, with the poor climb performance of a typical trainer, probably at max weight, the crosswind climb from 500' to 1000' followed by the protracted levelling out by the student before turning can position you very wide downwind. I would suggest in these circumstances to climb straight ahead to a greater height, possibly 700' or so to keep the downwind leg closer to the runway and avoid the. 'bomber' size circuits which seem to be rather prevelant these days.