Dana Goldstein via a kind reader’s email:

“Upper caucasia” is not the nicest name for one of Washington, D.C.’s “nicest” areas. Situated west of Rock Creek Park and just south of tony Bethesda, Maryland, are a number of neighborhoods — Chevy Chase, Friendship Heights, Tenleytown — that offer suburban- style living with an urban address. In a city that is 55 percent black and 17 percent poor, the residents here are, for the most part, white and wealthy.

Most children in this area attend private school, despite the presence of several well-regarded public options. So it was hardly a surprise last November when self-segregated Upper Caucasia erupted into turf wars as the Obamas toured elite preparatory academies, seeking a school appropriate for the first daughters. They settled, predictably, on Sidwell Friends, Chelsea Clinton’s alma mater.

But a month later, another prominent family’s search for a school went largely unnoticed. Secretary of Education Arne Duncan moved with his family from Chicago, where he had been chief executive officer of the city’s public schools, to Arlington, Virginia. High-quality suburban public schools were “why we chose” to live in Arlington, Duncan told Science magazine in March. “It was the determining factor.”