It isn't a federal mandate, which can be seen because not all states adopted Common Core. There were federal incentives for states adopting a standard which has

It isn't a federal mandate, which can be seen because not all states adopted Common Core. There were federal incentives for states adopting a standard which has been recognized as effective, including Common Core. https://en.wikipedia.org/wiki/Common_Core_State_Standards_Initiative https://en.wikipedia.org/wiki/Common_Core_State_Standards_In...