Pacer.org has a wonderful definition of what bullying is and how to help your child identify bullying.
Dosomething.org is a fantastic resource for teaching children and teens the benefits of doing good. This article about cyberbullying is worth reading.
More people than you think wonder about mental health. Here is a good article from mentalhealth.gov.
Each state has their own set of laws and policies surrounding anti-bullying that everyone should know.