I actually think you should push back hard because you are not asking for "individual" subject acceleration, which may require all kinds of crazy paperwork signed by multi-level administrators (like in our district). You are simply and reasonably requesting that your DD be placed in the top tier of a three-tier math hierarchy that is already in place.
It would be helpful to provide something along the lines of the ALEKS state standards list. I think that DS' school was more impressed by the ALEKS document showing 100% mastery on the 8th grade standards for our state then the EXPLORE scores comparable to top-performing 8th graders.
Perhaps you can request a trial with the top math group and counsel DD to double-check her work?
