Is he also identified as gifted by your school?
We did not get any items into DSs IEP for intellectual needs until he was officially designated as gifted this year in 1st grade. Our DS has had an IEP for ASD since age 3, but any academic differentiation was not put into his IEP until he was 7...even though teachers across the board (regular ed, special ed, speech, OT, ABA) commented regularly on how smart he was and that they could not challenge him academically.
We are changing schools next year to a school for the gifted in order to specifically focus on his intellectual needs primarily, and the physical ASD-related needs secondarily. It is a very hard balance.
Looking back, I wished I had pushed more for academic differentiation...but I was so caught up in ASD that I didn't. I even thought, "Good thing he is smart, he will only have to worry about social stuff and not worry about school work." That was before I realized that his passion is school work!!!
Nan