What Was the Evidence in the Vergara Case? Who Wins? Who Loses?

Diane Ravitch's blog

Judge Rolf M. Treu, who decided the Vergara case , declared that he was shocked, shocked to learn from Professor Raj Chetty and Professor Thomas Kane of Harvard about the enormous harm that one “grossly ineffective” teacher can do to a child’s lifetime earnings or to their academic gains.

How did he define “grossly ineffective” teacher? He didn’t. How did these dreadful teachers get tenure? Clearly, some grossly incompetent principal must have granted it to them. What was the basis–factual or theoretical–that the students would have had high scores if their teachers did not have the right to due process? He didn’t say.

The theory behind the case–as I see it–is that low test scores are caused by bad teachers. Get rid of the bad teachers, replace them with average teachers, and all students will get high test scores. You might call it the judicial version of No Child Left…

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