Below are links to two great websites that explain what Teen Dating Violence is and how to prevent it.

The first link is to a website that describes what a healthy relationship is and also what abuse is and gives information on safety and support programs.
http://www.loveisrespect.org/

The second link is to the Office for the Prevention of Domestic Violence. This site is mainly for public awareness and lists what help is available to those effected by Domestic Violence. I really like how this site explains the kind of violence that specific populations like teens, immigrant women, LGBTQ, and people with disabilities experience. This site also helps to understand domestic abusers.
http://www.opdv.ny.gov/public_awareness/campaigns/tdvcampaigns/