MoreExclusive: Wheaton College Faculty Say School ‘Discriminatory’ in Treatment of Tenured Black ProfessorWe Need to Change How We Teach Black History3 Tips to Help You Ace Your Next Job Interview Arne Duncan’s administration of the Education Department saw plenty of notable accomplishments: billions of new dollars for preschool, a rewrite of the country’s primary K-12 education law, a record high school graduation rate. Yet for all he achieved in his seven years, a reflective Duncan said he’s disappointed to leave office without having made sufficient progress in several other areas, including school desegregation. He sees a connection between his top three self-proclaimed disappointments — failure to further expand preschool, offer financial aid to undocumented students and clamp down on gun violence.