<p>Have you considered home schooling as a interim solution? The home school kids outperform public,parochial and private school students. There is a huge network of home school families that help each other out with subjects. K12 is an online school that has instructor led classes that are delivered over the internet. Kahn Academy offers online learning and it is free. The emotional maturity should weigh heavier in your decision over the advanced learning. Having time to develop emotional maturity will make his high school years more enjoyable especially if he is planning to attend a boarding school. I am a strong believer in single sex for middle school. My daughter also attended an all girls school for high school and it is paying dividends now that she is in college.</p>