...[T]he Center for Education Policy at George Washington University has put together a compendium summarizing over 60 research papers related to Common Core design and implementation. If there is empirical evidence on the importance of strong standards, this is probably the place to find it. Unfortunately, only two papers in the entire compendium are devoted to measuring the impact of Common Core on test scores. Both papers employ the dubious correlation-across-states methodology, and both give mixed results at best.Read the whole thing there.
Here's a radio interview I did to promote the piece:
And the Washington Free Beacon did a nice summary as well.