Tag Archives: VAM

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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Hawaii Cans VAM

Last week, the Hawaii Board of Education decided to move away from the use of student growth scores (value-added modeling, or VAM) in teacher evaluations. From the press release announcing the change: The significant changes to Policy 203.4, Teacher Performance Evaluation, are: •Remove student test scores as a required measure of student learning and growth; […]

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Connecticut Should Heed VAM Warning

Sarah Darer Littman writes of the recent Lederman decision on value-added modeling and warns Connecticut policymakers to take heed. Specifically, Littman notes: Justice Roger D. McDonough of the N.Y. Supreme Court’s 3rd District provided a reminder of this on Tuesday when he ruled in the case of Sheri G. Lederman that the N.Y. Education Department’s […]

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VAM: “Arbitrary” and “Capricious”

Those are the words from a New York judge in the case of a teacher who sued over her evaluation scores — scores based on value-added modeling, or VAM. While VAM has come under scrutiny from educators and academics as a suspect means of providing teacher evaluation scores, this case marks a turning point as […]

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Some Inconvenient Facts about VAM

Stuart Yeh at the University of Minnesota does some analysis of the existing literature on value-added modeling and its use in high stakes decisions around teachers. What he finds is that VAM is unreliable and not valid for use in high stakes decisions like hiring/firing and assigning pay. Here are some highlights: “Results indicate that […]

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Struggles with Value-Added Modeling

Over at Bluff City Ed, John Alfuth has a post from a teacher’s perspective on value-added modeling. What’s interesting is that Alfuth study public policy and identifies himself as a supporter of using VAM. That is, before he became a practicing teacher. Now, it seems safe to say that while he still supports some uses […]

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