Hey OP,
I just wanted to say sorry that so many people turned this thread into a discussion of whether they thought your DD was gifted or not. I think you have handled yourself very well especially considering many of the responses.
It seems to me that the school system you are in is not a good fit for your DD, but you already know that, which is why you asked for any suggestions on better schools. People ask for recommendation for better schools all the time on here when they are moving to a new area, I'm not sure why you were attacked for doing so. I really hope that you find a place with more opportunities for your DD next year.
I don't think anybody attacked the OP for believing her child was gifted. What I have seen is just giving her some insight that her small school may be giving her a false sense of what some of the bigger districts are doing.
If Algebra 1 and Biology is considered too far above her district's abilities to teach and is considered high honors for an 8th grader, then yes, she should move.
As I mentioned, in our district, Algebra 1 and Biology in 8th grade is the requirement for the average 8th grader, not some astronomical achievement by an 8th grader as her district believes.