Here's a bit of info about becoming a certified instructor/trainer. CTT+ (certified technical trainer) is a cross-industry standard, which has already been adopted by the software industry. I'm thinking about doing it myself.
I'm wondering if the music industry needs to adopt something like this?
Not sure how it would work though. but I do think that there needs to be a standard to which trainers work to. Plus, it gives the student reassurance knowing that the instructor is working to a standard.
http://www.comptia.org/certification/ctt/default.aspx