In your case it sounds like dc is working 4 years up in math. Even with the most teach to the child's level private school, I'd want to see some examples of what they have done in the past with kids working that far ahead in math/reading/writing/science. Not just in terms of them getting the classes they need, but what the kids' schedules look like. So often, even in schools like that, the kids get grouped into 3 groups - even if the kids in the "top" group are "wicked smart" your dc could be an outlier. And outliers are hard to accommodate from year to year at any school.
That being said dd loves her school, and with luck, will get another year of outlier accommodations next year. For us the decision has had to be year by year, so I would be very wary of selling the house and moving to the perfect school because it might only be a good fit for a year or two.
(Advocacy meeting today so I'm trying to balance my optimism and practicality...)
