While the school year is winding down, education policy sure isn't. This past week brought a bunch of front-page news on the Common Core. On May 30, South Carolina Gov. Nikki Haley signed a law requiring the state to stop using the Common Core after the upcoming school year. And last week, Oklahoma dropped the standards effective immediately, bringing the total number of states embracing Common Core State Standards down to 42, from a high of 45 (Indiana is the third state to have pulled back). Those states that adopted, and then dropped, the Core now face spending tens of millions of dollars to create new standards, adopt new materials to go with them and retrain teachers. Speaking of millions of dollars, the money behind the Common Core was the topic of a long story in the Washington Post that focused on Microsoft founder Bill Gates' role in the creation of the standards and in encouraging their implementation.