in some states, like tennessee, giftedness is seen as a disability...and so you can get an IEP for services, modifications, and accommodations. when they get an IEP, things like grade level and subject acceleration become a possibility. i have also lived in CA.....it is much much different in TN since they include GT under the special education umbrella. regardless, have you already talked with your district?
like the previous poster....we also used the iowa acceleration scale manual in deciding to and then advocating for our son's grade skip into kindy. it was very helpful. i also think it took the emotion out of it....which made us seem less like pushy parents and more like child advocates.
