Paul Thomas of Furman University (one of the four institutions that the National Council on Teacher Quality awarded four of its dubious stars) here gives Secretary of Education Arne Duncan a lesson in evidence. Duncan ridiculed the critics of Common Core in a speech yesterday to the American Society of News Editors.

Thomas now gives him a tongue-lashing for his indifference to evidence about test-based accountability. He includes a brief list of sources (read them) on the failure of testing and accountability as drivers of better education.

Another point that Duncan failed to mention: The Common Core has never been subjected to a field trial in any state. No one knows how it works. There is no evidence for its efficacy. No one knows if it will push struggling children further down, whether it will widen the achievement gap and harm children.

That would be nice to know, wouldn’t it?