A math class at P.S. 140 in the Bronx, where students starting in the fifth grade are divided by gender.

By Jennifer Medina, The New York Times, March 10, 2009

Michael Napolitano speaks to his fifth-grade class in the Morrisania section of the Bronx like a basketball coach. “You — let me see you trying!” he insisted the other day during a math lesson. “Come on, faster!”

http://www.nytimes.com/2009/03/11/education/11gender.html?_r=1