I'm curious if anyone has been successful convincing their child's teacher that their child is actually at a higher reading level than they've placed him in school. If you have been successful, how did you go about doing it?

So far, I have been unsuccessful with this and its frustrating.

I've tried pointing out what books DS is reading on his own (always FAR above the reading level they have him at) and basically get a "that's nice" kind of response. When I've politely ask if he's being challenged enough, I'm told "oh, yes, he's in the highest reading group". Just recently, I was told that the reason DS hasn't been moved up more since the beginning of the year was that "its encouraged that students spend 3-6 months at each reading level."