Numerous studies have suggested an association  between exclusionary discipline  practices and an array of serious educational, economic and social problems, including school avoidance and diminished educational engagement; decreased academic achievement; increased behavior problems; increased likelihood of dropping out; substance abuse; and involvement with juvenile justice systems. All of these problems are costly to the victims and to our society. They drive up the public costs associated with the aftermath of violence, substance abuse counseling, unemployment or underemployment, policing and the justice system, and much, much more.