Teaching a beginner, however is, in my humble opinion, a different matter.
Yes, that's a very important point. I teach a lot of beginners and, IMHO, that's the hardest kind of teaching. For students who aren't going on to a career in music, that first teacher is the most important as well.
The secondary issue here, which I guess is actually the primary issue in my case, isn't one of technique but rather of the role of the private teacher and the ensemble teacher in this situation. While I agree that there is more than one way to play well, for a student who's in the 7th grade, getting conflicting advice serves only to confuse and to hinder progress.
I screwed up by quoting Simandl to the school teacher - my bad. I was trying to be helpful and all I did was offend, it seems. That said, however, I feel strongly that a student's primary teacher ought to be just that, the person who teaches them, and that ensemble directors ought to defer to private teachers.
The waters get murky because some of the school children have private teachers while others don't - the latter group see the ensemble conductor as their teacher since they have a regular group lesson on their parts with them, and I guess I shouldn't be too surprised when the ensemble directors see themselves as primary teachers - they are for some kids, but they shouldn't be for someone who takes private lessons outside of school.
I think the right solution in this case is simply going to be for me to walk away from this student and let them find another private teacher, one who happens to go about bass teaching in a way that's more compatible with the school conductor. I don't think that's what _ought_ to be happening, but this student's needs can certainly be well served by someone other than me. I wish the parents would stick up for me, but I can't blame them for wanting to find the course of least resistance here - one has to pick one's battles and I'm not sure this one is worth fighting, for the student's parents or for me.
-S-