Some web sites with well-developed programs and resources include:

Stop Bullying Now - http://stopbullyingnow.hrsa.gov/

The "Stop Bullying Now!" campaign was developed by the Health Resources and Services Administration in partnership with more than 70 health, safety, education, and faith-based organizations. The website, which has both children's and adults' sections, offers animated scenarios, public service announcements, and resources for educators, health and safety professionals, parents, children, and the general public.

BullyingCourse.com (see below)