Dr. Timothy J. Lewis has been involved in special education for over 20 years. Dr. Lewis has taught students with emotional and behavioral disorders in high school, elementary, and self-contained psychiatric settings. At present, Dr. Lewis is Professor and Associate Dean for Research, Development, and Graduate Studies at the University of Missouri. Dr. Lewis has been involved with developing school-wide systems of behavioral support for over 15 years. He has worked directly with school teams around the world, secured several federal grants to support his research and demonstration efforts, and is a frequent contributor to the professional literature examining various aspects of Positive Behavior Support. His specialty areas include social skill instruction, functional assessment, and proactive school-wide discipline systems.