Tag Archives: VAM is a Sham

Court Rules Against Flawed VAM Model

A Texas court has ruled against the use of value-added modeling in teacher evaluation saying the system used violates due process. Texas now joins New York as states where courts have found value-added systems used for teacher evaluation simply don’t stand up to scrutiny. Here’s more on the Texas case: Judge Stephen Smith of the […]

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VAM-Based Bias

  Turns out, it does exist! By way of Audrey Amrein-Beardsley, we learn: Overall, Deming failed to reject the hypothesis that school-level effects as measured using VAMs are unbiased, almost regardless of the VAM being used. In more straightforward terms, Deming found that school effects as measured using VAMs are often-to-always biased. Read more about […]

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