Robert Pondiscio over at the Core Knowledge blog has written a good post on the LA Times article controversy titled Value-Added: When Being Right Isn’t Enough. I’d encourage you to go over and read his post and regularly read his blog (by the way, I’ll be publishing an interview with Robert soon).
He reviews Dan Willingham’s criticisms of using “value-added” as an evaluative tool.
Through his post, I also learned that Willingham has developed a short video that explains the value-added approach and its problems in an accessible and, amazingly, in an engaging way. I’ve embedded it here, and will be adding it to The Best Resources For Learning About The “Value-Added” Approach Towards Teacher Evaluation.