Interestingly, the Gliding Federation of Australia instructor course has about half the course hours devoted to the subject of "adult education", which is not the same as teaching school kids. Teaching instructors to teach, not to fly, that "should" be a given. An Instructor course should not be (but all to often is) a remedial flying training exercise.
I think that's a very good and important point.
Much of my training was in fact centred about the method and rate of information transfer in the cockpit environment .
It always puzzled me that there was no comparable information in the powered instructor syllabus.
Even more interestingly, several of my friends who had graduated from Teachers College were bowled over by the "phsychology of learning" sections in the GFA Instructors Handbook.
They claimed that their life would have been much easier had they not had to learn all that from experience.