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D.C. Discloses Mistakes in 'Value Added' Scores

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Errors were made in calculating the "value added" scores of 10 percent of the District of Columbia teachers who were evaluated using that model for the 2012-13 school year.

In total, 22 teachers received a lower rating than they should have, and 22 received a higher rating, according to the school district. Although the district employs about 4,000 teachers, only 440 were evaluated on a model that counts student test scores as a significant factor.

As a result of those miscalculations made by Mathematica Policy Research, one teacher was fired. District officials say they are attempting to reinstate that teacher.

Vol. 33, Issue 15, Page 4

Published in Print: January 8, 2014, as D.C. Discloses Mistakes in 'Value Added' Scores
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