Mr. William Duncan brings to his teaching about the United States Constitution experience in constitutional cases related to marriage, parents and the family. He has served as the acting director of the Marriage Law Project at the Catholic University of America, visiting professor at the J. Reuben Clark Jr. Law School at Brigham Young University, and is currently the director of the Marriage Law Foundation. He also teaches family law classes to undergraduate students at BYU as an adjunct professor. He has published numerous articles in law journals, as well as other academic and popular publication on family and constitutional law issues. Recently, he was invited to write two essays on specific numbers of the Federalist Papers for the Constituting America project. He and his wife, Catherine, are the parents of four daughters and three sons whom they home school.