Check out the Alternatives to Violence Project and Help Increase the Peace. They are related experiential programs that can be adapted for class room transformation. http://www.youtube.com/watch?v=14LkAnKAsa4
You might also look at this manual from Washington State on Compassionate Schools "Compassionate Schools benefit all students who attend but focus on students chronically exposed to stress and trauma in their lives. These schools create compassionate classrooms and foster compassionate attitudes of their school staff.": http://www.k12.wa.us/CompassionateSchools/