Have you tried talking to the teacher about her skills? Perhaps bring in some work that she does at home and ask if any differentiation is possible. I would also bring in some general articles about gifted kids and ways to differentiate and leave them with the teacher after saying something like "I'm sure you have seen these before, but I am just in the habit of giving out some resources to my daughter's teachers since I know how busy teachers are and you probably don't have time to look for such information."
I would either search Davidson's resources for some to print off, or get some from Hoagies or even give her the url's to the articles in an email as well as giving a paper copy.
Good luck.
