Philip S. Hall is a psychologist with 30 years of experience working with children who have challenging behaviors. For the past 10 years, he was Director of the School Psychology Program at Minot State University in Minot, North Dakota. During that time, Hall provided a comprehensive clinic for children with oppositional and defiant behaviors and their families. Recently retired from academic work, he continues to consult widely to schools faced with students who have challenging behavior or learning problems.