David W. Johnson, Ed.D., is a Co-Director of the Cooperative Learning Center at the University of Minnesota. Johnson held the Emma M. Birkmaier Professorship in Educational Leadership at the University of Minnesota from 1994 to 1997 and the Libra Endowed Chair for Visiting Professor at the University of Maine in 1996-1997. He has authored over 500 research articles and book chapters and over 60 books and is a former editor of theAmerican Educational Research Journal. For the past 50 years Johnson has served as an organizational consultant to schools and businesses throughout the world. He is a practicing psychotherapist. He received the American Psychological Association’s 2003 Award for Distinguished Contributions of Applications of Psychology to Education and Practice. In 2007 he received (with his brother Roger) the Brock International Prize in Education administered by the College of Liberal Studies at the University of Oklahoma. In 2008 he received the Distinguished Contributions to Research in Education Award from the American Education Research Association and in 2011 he was awarded the Alfred M. Wellner Lifetime Achievement Award by the National Register of Health Service Providers in Psychology.