Sax is the founder of the National
Association for Single-Sex Public Education - the NASSPE website is
extremely comprehensive and contains much of the same information as his book.
Eight years ago, only four public schools in the United States offered single-sex educational opportunities. As of January 2006, at least 211 public schools in the United States are offering gender-separate educational opportunities. Most of those are coeducational schools with all or some of their classrooms run on a single-sex basis, but 44 are completely single-sex (see the list).