Characteristics of school closures by academic year — United States, 2011–2013.

aClosure events where reopening date not specified were assumed to last 1 day.bStudents and teachers were counted once for each closure event.cPart-time teaching positions were reported as a fraction of one full-time position [30].dSchools were counted once for each closure event. 286 districts that did not match to NCES schools were counted as one school. District-wide closures could only match to public schools in NCES database.eReported for 10,207 schools in 2011–2012 and 40,620 schools in 2012–2012; data applicable for public schools only.Characteristics of school closures by academic year — United States, 2011–2013.