As others have pointed out, the Common Core is a national experiment that was not meaningfully field-tested in advance. What explains this desire to put an entire nation of eggs in one basket? It’s one thing to be confident in a policy proposal; it’s another thing to be so confident that you think no community in America should be allowed to try a different approach. What if the approach represented by the Common Core turns out to be a bad idea that has unintended consequences? Won’t we regret that we didn’t diversify our portfolio a bit?
Unintended consequences from education policy? Unimaginable!