I think these are all great suggestions. I'm thinking that the one that could most easily be presented as in the best interests of the school would be #1, as you could even offer to help with some differentiation groups once a week, or some other parent volunteer-ish-type activity. Additionally, her pace of math instruction would not be limited to a lesson a day in a higher level of math, but would be whatever she can handle.

...pronounced like the long vowel and first letter of the alphabet...