I like the 2E material that Wrightslaw has aggregated:
http://www.wrightslaw.com/info/2e.index.htm

Relevant quote from a Department of Education memo regarding 2e:
"... it would be inconsistent with the IDEA for a child, regardless of whether the child is gifted, to be found ineligible for special education and related services under the SLD category solely because the child scored above a particular cut score established by State policy."

Which sounds to me like working at grade level as a sole measure would be considered inconsistent with the Individuals with Disabilities Act.