Two-and-a-half years ago, economists Raj Chetty, John Friedman, and Jonah Rockoff published an extremely influential and well-known study that popularized Value-Added Measurements as a teacher evaluation tool and has caused huge damage to teachers, students and their families. You can see a collection of commentaries on their study here. They have also been public advocates of policy solutions using their studies as evidence (that same link will lead you to examples).
Flashforward to now. Gene V. Glass (you will be able to see an interview I did with he and his co-author David Berliner next week in my Ed Week blog — their book is titled 50 Myths and Lies That Threaten America’s Public Schools: The Real Crisis in Education)> just tweeted out a new report from those same three researchers that indicate they might be having second thoughts.
It seemed to me a bit odd — they seemed to be defending VAM for most of it, but then ended with this kicker:
I’m adding this info to The Best Resources For Learning About The “Value-Added” Approach Towards Teacher Evaluation.