In the foreign public school, I had Algebra in second grade. The competitiveness to excel was very high. In U.S. private school, I had some of the best teachers, who really knew and taught their subjects to the minutest detail. I know lately public schools have come under a lot of criticism. But the truth is the truth, public schools in other countries have very little financial support.
Teachers there make very little, but education level is very high.
In U.S., public schools make more per student than parochial schools. It could be for any variety of reasons like stale class material, boring conversation, internal turmoil, and so on. For inferior education institutions and for some parents who don't invest the time with their child, it has become very popular as an excuse to recant the blame by claiming child has an AD syndrome. For a bright child like your daughter, I would really look for the reasons why she is not interested in her class material. So for all these reasons and more, I am considering home schooling as an option.