Suspicious DC CAS erasures down in 2011, but OSSE withholds school-by-school data - D.C. Schools Insider - The Washington Post

Suspicious DC CAS erasures down in 2011, but OSSE withholds school-by-school data - D.C. Schools Insider - The Washington Post: "An analysis of 2011 reading, math, science and biology exams by their publisher, CTB/McGraw-Hill, shows that 128 classrooms in public and public charter schools in the District had high rates of wrong-to-right erasures.

That’s a drop of nearly 50 percent from 253 classrooms in 2009. The 128 classrooms represent less than 3 percent of the total number of classrooms in which students were tested."

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