DS has a 3 year math acceleration and is taking math with gifted kids two years older. It works.... sort of. It's certainly better than being with age peers, for sure.
Be aware: Hand writing size is a real issue for showing ones work, even for a kid without dysgraphia. We've seen issues where the space required to do one problem meant that he'd write over the subsequent problems on a test, then fail to do those problems, and of course miss most of the test as a result. We also see differences in stamina around homework and the amount of writing required. The pace of math instruction is still too slow.
The kids in the room at the start treated him as kind of a class pet, the cute little boy whose feet don't touch the floor. Now he is a fully fledged member of the class and the kids are used to him.
