I'd make the initial takeoffs on an unused runway and have the student taxi out and assume a takeoff position. Then I'd just let them sit there and watch as I directed their attention to the two sides of the lower windshield and how the runway looks when in this position.
Yup, good one. Two more things I do, (not that this has a lot to do with turning)
I demonstrate the round out and hold-off while feeding in power to remain level at the round out height, then climb a couple of feet, go back down, up again, and so on until we run out of runway, while the student calls out what is happening. It gives them a lot longer to see what is happening. Next approach is theirs, and usually they manage a decent round out and hold off at once. I do cheat by approaching rather fast, and I don't hide this from them, I explain before flight that it is to enable them to take a longer look at the round out and hold off. This works with gliders as well, just keep the airbrakes closed, but obviously you need to leave enough runway for a landing .
The other thing that is useful is to have them climb up and down a stepladder while they change from near vision to close in, to give them a feel for where they should be looking to judge height. Very cost effective as long as they don't fall off
I have been known to get the student to film an approach, (mine) but I'm not happy about working a handheld camera while teaching a landing and I really don't see any way of fitting a camera mount to our school trainer, we work quite close enough to the legal weight limit as it is (3 axis microlight - does that debar me from posting here ?
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only charge for flight time the pre briefing and post briefings are treated as quality time sharing.
We do that as well at our club, but at the risk of getting flamed, I will admit that all our instructors are part time unpaid. The student pays a little more for dual, which covers stuff like teaching materials, instructor mileage, and so on. We have a mixed field, two robin DR 400, an alliance two seat glider, and a skyranger microlight, as well as single seat gliders, and private gliders, microlights, and light aircraft, all off a grass strip 80 metres by 740 metres, no ATC, radio not required but encouraged. The french aero club culture is still alive and well, the only person who gets paid is the supervising engineer. Instructors, tug pilots and office staff are all club members working for the mutual benefit of all club members. Oh yes, we take turns at duty pilot and cleaner!