teaching the circuit/pattern...
in a modern circuit/pattern, there is actually littletime on final...the most important part if you ask me
so, why not take your student to a place where final can be five miles long and DO trim so that you can let go of the controls and still have your vref maintained at the proper rate of descent.
practicing ground reference maneuvers like turn about apoint and rectangular course over the ground is important
but the real aid in landing is ''slow flight'' or flight at minimum controllable airspeed.
you can't learn how to land in the few seconds of final in an average traffic pattern.
also...have the student fly a low pass over the runway at a few feet, not touching down...(full landing configuration) and then without warning, reduce the throttle and they will end up with the niceest touchdown you can imagine
(use a good long runway for this)