Forty-five states and the District of Columbia have adopted the Common Core State Standards, and 36 states and the District of Columbia have schools with expanded-time schedules.

But by then hard-right opponents of the Core were not talking about any verifiable reality; instead “Common Core” had been expanded to cover everything they hated about “government schools.” ...

A study of national test scores indicate the early phase of the Common Core State Standards did not help disadvantaged students.