Seven Houston Teachers Suing Over Flawed VAM Ratings

Diane Ravitch's blog

Seven teachers in Houston are suing the district over the use of test-score-based evaluations.

Good for them!

As a K-12 graduate of HISD, I am proud of these teachers for standing up for their profession.

I hope they will introduce as evidence the recent statement of the American Statistical Association cautioning about the limitations of VAM, as well as the joint statement of the National Academy of Education and the American Educational Research Association, warning that VAM produces results that are inaccurate and unstable.

Here is a good list of references the plaintiffs can use.

VAM is junk science when used to rate individual teachers. The ratings change if a different test is used. VAM says more about the composition of the class than the quality of the teacher.

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