commissioner for refugees, antonio guterres. >> thank you. this month oklahoma became the latest state to take a big step toward repealing the common core education standards. the oklahoma state senate passed a bill just last week to do so. this, as more than a dozen other states are considering repeal, and still others are reviewing how they use the standards when it comes to teaching and testing. it's a big shift from the broad, and often bipartisan support it seemed to have just a few years ago. jeffrey brown has the story. >> brown: common core was initiated in 2009 by the nations' governors, seeking national standards for math and english literacy. u.s. secretary of education arne duncan supported the move, spending $350 million to develop common core tests. >> i believe this new generation of assessment is an absolute game-changer for american education. >> brown: in relatively short order, nearly every state, plus the district of columbia, agreed to create curricula based on the common core guidelines. but more recently, a backlash has