Streaming of teachers? I have often thought of this in terms of "sending the elevator back down", a concept I have talked about in many an after dinner speech. Sending the elevator back down to give others a helpful lift, is the approximate quote.
In ringing terms, teaching others is sending the elevator back down, but what is inefficient about ringing training is that the elevator tends to get sent down much too far, because those on internediate floors aren't doing enough of the training. So for instance you get every experienced surprise maximus ringers teaching bell handling whereas it would be better if they were running surprise major practices, and those attendees were doing the teaching of those on lower floors. So the surprise major practices tend not to happen.
If you only have a finite amount of teaching time in you then having it taken up by teaching very many floors down, rather than just a few floors down, means the higher floors don't actually get taught. And I think that is what happens in reality, certainly where I live. Where I see it most is i the Birmingham School where the helpers at any particular tower will be a mixture of Red and Black Zone ringers, and it really doesn't matter to the students whether the helpers can ring Cambridge Minor or cyclic spliced maximus - they just need the helpers to ringing Bob Minor or whatever and not be scary in any way. The School has been very successul in turning students into helpers, but not as yet into teachers.
I am not absolutely convinced by "prestige" of teaching, although there is certainly kudos attached to it. Does it make less experienced ringers reluctant to teach? I am not sure. My idea for the Cast of 1000 word work if all those people who go off peal ringing every Saturday could just commit one Saturday a month to helping at a ringing school. But they don't because the structure is not yet in place. If doing a day's teaching at a ringing school really was prestigious, then this plan could be accellerated because all these peal ringers would be knocking my door down to participate.