Claus von Zastrow, Executive Director of Learning First Alliance, rightly points out in a blog post that the failure of class size research to show enough test score gains to be worth the cost past 3rd grade really points to the failure of test scores themselves to tell us much.

Interestingly, the author of the first comment speaks to precisely my train of thought when I looked into the class size research and its limitations. I ended up looking beyond just class size to the other–intertwined–relational factors. Tom came across my book in that process.  His comments are: