More schools separating the sexes

There is an old saying- Everything that is old is new again and that appears to be what is happening in education.
An article in today's Wsshington Post explores a return to separating the sexes at schools:

With encouragement from the federal government, single-sex classes that have long been a hallmark of private schools are multiplying in public schools in the Washington area and elsewhere. By next fall, about 500 public schools nationwide will offer single-sex classes, according to the National Association for Single Sex Public Education, based in Montgomery County. That's up from a handful a decade ago. The approach is especially attractive to some struggling schools in the market for low-cost reform.

The 2002 No Child Left Behind law cites single-gender classes as one "innovative" tool to boost achievement. But anti-discrimination laws banned widespread use of such classes, allowing them only in certain instances, such as sex education lessons. A change in federal regulations in 2006 gave schools more flexibility, allowing boys and girls to be separated as long as classes are voluntary and "substantially equal" coeducational classes are offered.