He has been a researcher and teacher educator for more than 20 years, and prior to that taught students with emotional and behavioral disorders in residential and public school settings. He has authored or co-authored more that 50 articles, chapters, and books, most of which deal with emotional and behavioral disorders, classroom and behavior management, and the translation of research into practice. With James M. Kauffman, he is the co-author of the highly regarded text, Characteristics of Children’s Behavior Disorders.