Rand Corp. Report Says Grading Teachers by Student Scores Doesn’t Work; Ohio Law Will Diminish Use of Student Scores for Evaluating Teachers

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In 2009, the Bill & Melinda Gates Foundation launched a huge project to demonstrate that evaluating teachers by their students’ standardized test scores would improve education and especially the education of “low-income, minority” students. Now the Gates Foundation has paid for a huge Rand Corporation study that showed its original experiment didn’t work. Although the Gates Foundation can move on to testing another hypothesis, its prescription for grading teachers has done immeasurable damage by injecting econometric teacher evaluation into the laws of many states. It will take a long time for the 50 state legislatures to clean up laws based on a mistake.

Chalkbeat‘s Matt Barnum describes the original plan: “Barack Obama’s 2012 State of the Union address reflected the heady moment in education. ‘We know a good teacher can increase the lifetime income of a classroom by over $250,000,’ he said. ‘A great teacher can offer an escape…

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