USA Today reported in March that from 2008 to 2010, classrooms in more than 100 D.C. schools registered unusually high rates of erasures on answer sheets; wrong answers were changed to correct ones. A test-security firm the District hired to investigate found evidence of “testing irregularities” at three schools during administration of the 2010 D.C. Comprehensive Assessment System exams. As a result, D.C. officials
invalidated test results in three classrooms at Noyes Education Campus and Leckie and C.W. Harris elementary schools and, according to multiple school system and union sources, dismissed at least two teachers.