This article gives a list of the pros and cons of single sex vs co-ed schooling.
Pros and Cons

The 49ers study involves segregation of students by sex and the personal opinions of the subjects.
49ers study

The next article describes how single sex education solved some problems, but create others.
Single Sex schools no cure

This is an interview aired on NPR that talks about the trend of more single sex schools arising in South Carolina.
NPR

While other articles focus primarily on the effects of single sex education on females, this article highlights the possible effects on males.
Boys in Crisis