Instruct mostly on the 152. If not the 152 or 172, then of course I follow the POH for a rejected landing.
In the 152, Power, carb heat, then flaps (to 10deg) for me. I'm open to suggestions, but it seems to me that you want the most airspeed available at the soonest time. Primarily instruct out of shortish(2000-3000 ft) strips