Arne Starkey Duncan was the United States Secretary of Education from 2009 through December 2015. While his tenure as Secretary was marked by varying degrees of opposition from both social conservatives and teachers unions, he nevertheless enjoyed strong support from the US president who appointed him, Barack Obama. Conservatives and some parents resisted Duncan’s push for all U.S. states to adopt the Common Core Standards to determine what students had learned, and most US teachers unions disliked his emphasis on the use of data from student tests to evaluate teachers and schools. Despite antagonism to the changes Duncan had introduced, Obama praised his work at the Department of Education by saying, “Arne has done more to bring our educational system – sometimes kicking and screaming – into the 21st century than anybody else.”Duncan previously served as CEO of the Chicago Public Schools from 2001 to 2009. He is currently a senior fellow at the University of Chicago Harris School of Public Policy and a board member for Communities In Schools and Community X.