Hi Tamlynne,
You are living our life, except for the fact that our school will not allow for grade skipping or advanced academics, so my seven-year-old Asperger son with an IQ of 154 has to stay in first grade doing 2 + 2 = 4 worksheets. They supposedly differentiate in the classroom, but the teacher's efforts are weak at best. When DS acts out from boredom or frustration, he is punished and punished and punished. Your school sounds much better than ours. We are going through hell.
Advocating with Aspies is very challenging and complex, I've been there. I hope you find something that will work for your DS.
