I don't think the MAP score can really translate to any grade level. Since the classroom teacher has to go with the pace of the majority, your DD will never be satisfied with the depth they teach.
Since she has already done 6/7th grade, she should be ready for Algebra and Geometry, the stuff normally taught at high school. However as parents, we need to take a balanced approach. I think it is important to help her to develop independent learning skills. For secondary school math, you can take a look at artofproblemsolving.com. I have not tried their online classes, but bought some books for my DS12. At least that gives him enough real math problems to do.