Originally Posted by syoblrig
My concern is that forcing her to stick with this class will make her hate math.

I suggest you find something else where she can work to her level. How about IXL, Kahn, Thinkwell, CTY, BYU online, or any of the numerous other online math classes. AOPS is extremely well regarded, especially for gifted kids, but it's not for every gifted kid.
I agree.