We have gotten this quite a bit over the years. As in, "we have a lot of bright students" or "there are a lot of kids who are doing very well in math" or "she's not getting 100% right on everything so there are still things for her to work on." What's frustrating about it is when you have documentation that your child is in the 99.9th percentile - just statistically you're not going to have several kids in the class performing at that level in a normal classroom. I think the problem comes in, though, because of two things: 1) teachers, for the most part, don't understand testing, and 2) teachers are looking at grade-level measures and never even look at how far beyond the curriculum any given student is (e.g., several students may be getting 99 percent correct on grade level material, but only two of those are performing a grade level above, and of those two, only one - your child - is two to three years above).
Unfortunately, we haven't had much luck in convincing many people that our child is not merely one of many, but that doesn't mean that we haven't been able to advocate successfully. Above level testing helps, as does just ignoring their comparisons of your child to others and focusing on getting your child's needs met. I certainly empathize, and wish I could offer more advice.
