I have to admit that I went to an all girls' private school, the headmistress of which is quoted in one of this article.
Girls and boys learn differently. By being separated from boys, girls can concentrate on learning, on leading (in clubs etc.) and don't have worry about what Tommy will think if she answers the question. They are allowed to grow independently (and they get into less trouble sexually). I'm all for it.
http://www.zwire.com/site/news.cfm?newsid=10155538&BRD=2329&PAG=461&dept_id=484827&rfi=6
Some may argue that there is too much of a difference between public and private schools. I'm still trying to figure out why public schools can't challenge their students as the private schools do. It's not all money; look at how expensive our school taxes are.
Swap "girls" for "boys" in the above paragraph, and it's also true.
Actually, it would be MORE of an improvement for boys, as the "ed-biz" these days is turning into more and more of a "woman-dominated" environment, and women think "natural boy behavior" is "bad" or a result of ADHD, and drug the poor little males into a stupor.