Although single-sex education was once the norm in the U.S., the practice has largely been confined to private schools for more than a century. However, with the introduction of the final version of the U.S. Department of Education's so-called single-sex regulations in 2006, public schools were allowed greater flexibility to offer single-sex…

Since public schools have been largely unable to address gender-based academic achievement inequalities and often ignore sexual-harassment incidents, there has been increasing discussion and study of all-girl classes and schools. Several studies have shown promising results--especially for science classes. Programs in Maine, Virginia, San…