Obama attacked Romney for his comments dismissing the importance of small class sizes.  And there’s some grounds for that – Raj Chetty has found that students in small kindergarten classes make hundreds of thousands more in their lifetimes than students in larger classes. But it’s worth noting that the Obama administration has diminished the role of class size too, with Arne Duncan stating, “Class size has been a sacred cow and I think we need to take it on.”

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