They evaluated academic, social, and psychological results. They concluded that single-sex Catholic secondary schools are not appreciably better academically than coeducatonal schools. While single-sex school students score typically better on standardized tests, etc, they do not seem to really learn more than their counterparts in coeducational schools, because students in both settings increase their scores by basically the same amount from 8th to 10th grade. This article is on microfiche in Foley under the ERIC number indicated above and should be available unless bad things happen. A room of their own.
Public schools try single-sex classes.
This article talks about how single-sex classes are much more beneficial for the students. There are lots of different examples which the author uses to prove his point and a lot of good quotes. This would be a good article to use. Why it Works at the Middle School Level. This artical shows a good example of how and why single-sex math and science classes work.