D.L.V.
I can't but help question why you would teach your students glide approaches from the 1st circuit and I'm afraid the arguement that it will teach early judgement in cause of a forced landing / or just like a Tiger Moth doesn't really wash with me. There are more requirments in this day and age for a correct landing than a correct forced landing.
I would think that a powered approach would teach early judgment which would prove useful in case of a NORMAL landing, bearing in mind that just about every aircraft the student goes on to fly will be landed after a powered approach rather than an glide approach.
A forced landing does require judgment skill but those should be taught at the appropriate time in the syllabus and if memory serves me correctly there are several lessons devoted to fullfilling that sequence, which include EFATO, Glide approaches and PFL's. From your post I would have to wonder if and where normal landings fit in and if it is after PFL's would it not cost the student more.
IMO I feel that sometimes it is too easy to focus on one picture but lose sight of the the movie.
In regards to your advice re reading the manufactures POH, good advice, but just as pertinent, sit down and discuss it with your CFI and find out how he/she expects it done because when it all boils down, they are the Boss, have the experience, the authority, and also the shoulders that take the blame should something go wrong.
Cheers