For the people debating cleaning a dojo, and the legal side. What about blackbelt instructors who pay the monthly fee, but it asked to teach as a fill in by the head ranking instructor? Isnt this common as well? With the only payment being teaching experience that awards new dans/degrees?
Hey, I don't see the problem. I'll be the first to admit that I don't know the "ins and outs" of the laws involved. But in my organization, both a knowledge of our instructional methodologies, and actual teaching experience are required for second degree rank. In fact, one of the big reasons I finally started teaching again was so one of our first degree students would have an opportunity to fulfill this requirement by assisting me and learning the ropes.
Now, I don't charge him for that. In fact I volunteer my own teaching time to support the Y. But if I were running a full-time, for-profit business, I don't see why I couldn't charge him. After all, it's part of our learning requirements, and I had to pay to be coached as an instructor back in my time. Heck, I also had to pay big-time to the state university when I was working (unpaid) as a student teacher in order to get my teaching certificate to work at a public high school.