A little update: I spoke to DS's math teacher for an hour on Friday and was both immensely relieved and frustrated. Relieved because, while I knew she was good, I had no idea just how fantastic she was. She teaches accelerated math (4th grade curriculum) but sincerely differentiates beyond that with the goal that every student is challenged appropriately. And she said DS is mostly focused and on task in her class. I was very happy to hear that, but then SO sad because I truly believe that ds would be flourishing in her class as homeroom rather than checking out like he is in his own class. At least he has her for an hour a day, though, and after discussing some of the issues he's having in homeroom, she offered to touch base with his teacher to see if she could help.