1998 Annual Report on School Safety
Site offers suggestions for school to improve safety.
http://www.ed.gov/pubs/AnnSchoolRept98/index.html

Best Practices of Youth Violence Prevention: A Sourcebook for Community Action
Best Practices is the first of its kind to look at the effectiveness of specific violence prevention practices in four key areas: parents and families; home visiting; social and conflict resolution skills; and mentoring.
http://www.cdc.gov/ncipc/dvp/bestpractices.htm

Early Warning, Timely Response-A Guide to Safe Schools
A Guide to Safe Schools Identifies both anger and aggression as two of the many warning signs.
http://cecp.air.org/guide/guide.pdf