You have to take the 18 minutes to view this news conference announcement in order to appreciate the profound unfairness of using VAM for ANY high stakes decision. For more context, detailed discussion, and a survey of the mountain of research studies, buy the book. Tagged: teacher certification, teacher licensure, Tennessee schools, value-added
![](http://stats.wordpress.com/b.gif?host=atthechalkface.com&blog=10952070&post=32651&subd=shaunpjohnson&ref=&feed=1)