In Brooklyn, Hard-Working Teachers, Sabotaged When Student Test Scores Slip - NYTimes.com: "A teacher’s rating depends on how much progress her students make on state tests in a year’s time, and is known as the value-added score. Ms. Allanbrook, the principal, has another name for what’s going on. She calls the scores the “invalid value-addeds.”
If city officials were trying to demoralize and humiliate the workforce, they’ve done a terrific job. News organizations get an assist for publishing the scores, and former Schools Chancellor Joel I. Klein deserves a special nod for enthusiastically supporting the release."
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How could this possibly have happened?
ReplyDeleteThe short answer is: Numbers lie.
And not only do they lie, but they are out of date, in this case covering student test results from 2007 to 2010.
Though 89 percent of P.S. 146 fifth graders were rated proficient in math in 2009, the year before, as fourth graders, 97 percent were rated as proficient. This resulted in the worst thing that can happen to a teacher in America today: negative value was added.
The difference between 89 percent and 97 percent proficiency at P.S. 146 is the result of three children scoring a 2 out of 4 instead of a 3 out of 4.