I know this isn't an answer to your question, but I wouldn't immediately dismiss your local school without investigating further.
In our experience there are many reasons why a school might not be meeting AYP. In our district it is largly a result of having a lot of students who are new immigrants to the country and haven't yet had the time to learn the language and do well on the tests. Anyway, whatever the reason, sometimes the discrepancy between where your child is and where the average child in your school is makes more stark the reason for a different and individualized curriculum for your child.
In other words, in some schools with great credentials or a high population of gifted children, the school will take the approach that they routinely meet the needs of all their gifted students and so they do not need to do anything different for your child. Even gifted schools will do that. Of course, whether those schools will meet the needs of *your* child depends on a lot of factors. At a school with a wider range of abilities among children, sometimes the administration and/or teachers will recognize the need to meet a higher performing child at his or her level, where ever that is. Not to mention that they might be willing to do what it takes to keep your high-performing child in their school, if only to help raise the school's scores.
We have had success in our district not only with individualized lesson plans for our children but also with the school having multiple-level teaching in math, reading, and spelling at all grade levels.
Not saying that the public school will work for you, but just wanted to throw out there that you might want to ask them what they could do for a child like yours.
