IMHO in the early stages of training it is important to be consistant. If you tell the stude at straight and level, climbing and descending stage that they control the airspeed with attitude, and control altitude or rate of change of altitude with power, and that the stall recovery is to increase airspeed by lowering the nose; it then becomes contradictory at circuit stage to change all that and tell them that power now controls airspeed. Understandable if they then have trouble maintaining correct glide speed in glide approaches and forced landing practice.
So I reckon attitude = airspeed, and power is the only fundamental difference between us and gliders and gives us the luxury of choosing our altitude and graeter control of our rate of descent on the approach. (And the luxury of being able to go around!)
The technique for doing an ILS in a Baron doesn't really work in a Tomahawk...