To add to that-- of course, fringey charter might come with baggage that your family finds is completely unacceptable, in which case; NO.

However, if there is one that doesn't, they might be more amenable to the approach that DeeDee mentions-- that of negotiated and highly individual solutions to educational challenges/barriers.

Whether or not that is a real option depends upon how rigid your state and local charter restrictions/guidelines/laws are, and on the particular charter, of course. But it might be worth investigating. A charter might be open to things like having a student do EPGY/AoPS for math as a pull-out, for example.

Schrödinger's cat walks into a bar. And doesn't.