With regard to teaching, I'd have thought now more than ever the need for teaching is diminishing, with instantly viewable results from simply experimenting.
Just playing with lights, continually changing set ups, you'll learn far more. That's how I learnt, doing just that, except I had to develop the film first to see the results. No internet and endless tutorials just Michael Freemans Studio Manual.
There seems to be an increasing myth in photography at the moment, especially in the social networks and magazines like Pro Photo, who continually advise budding and even working photographers, that they need to go on a course of some description to "hone their skills". If it's business studies, then maybe, but otherwise just get out there and play, you can see straight away what works and doesn't, it's not rocket science :shrug:
Too many photographers realising the bottom is dropping out of their particular market and, quite rightly so, are looking to diversify. Trouble is just because you may be good at something, doesn't for one second mean you know how to convey that information to others who don't. I speak from experience having spent 5 years teaching colour printing at Brighton Poly (as it was all those years ago!)