The Answer Sheet: rigoberto ruelas
Ravitch: Why teachers should never be rated by test scores
Education historian Diane Ravitch writes: "...Value-added assessment should not be used at all. Never. It has a wide margin of error. It is unstable. A teacher who is highly effective one year may get a different rating the next year depending on which students are assigned to his or her class. Ratings may differ if the tests differ. To the extent it is used, it will narrow the curriculum and promote teaching to tests. Teachers will be mislabeled and stigmatized. Many factors that influence student scores will not be counted at all."
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06:30 AM ET, 10/06/2010 |
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