This is as compelling a case against value-added measures as I’ve read.
(When i wrote this, I had no idea just how deeply this would speak to people and how widely it would spread. It even ended up being republished by Valerie Strauss of the Washington Post’s Answer Sheet. So, I think a better title is I Dare You to Measure the Value WE Add.)
Tell me how you determine the value I add to my class.
Tell me about the algorithms you applied when you took data from 16 students over a course of nearly five years of teaching and somehow used it to judge me as “below average” and “average”.
Tell me how you can examine my skills and talents and attribute worth to them without knowing me, my class, or my curriculum requirements.
Tell me how and I will tell you:
How all of my students come from different countries, different levels of prior education and…
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