Abuse

Children's Refuge - Offers a place to play, learn, tell jokes, chat with peers (monitored), links to safe sites, downloadable online games, and the option to ask for help and report child abuse.
http://www.childrensrefuge.com/

Speers Society: For Teens - Provides information, for the victim and the abuser, about preventing abusive relationships. Includes what abuse is, different types, warning signs, support tips, and special problems for teens.
http://speerssociety.org/for_teens.html

Stephanie's Safe Haven: What is Abuse? - The definition of abuse, from several sources.
http://www.geocities.com/hotsprings/3885/abuse.html

Love Our Children USA - Information for kids and teens on recognizing and reporting child abuse. Includes national hotlines for a number of protective agencies.
http://www.loveourchildrenusa.org/kidsteens.php

Help For Kids - Designed by a kid for kids dealing with emotional abuse and/or bullying. Explains why some people abuse others, why it is wrong, and how to overcome it. Includes links to other places to go for help
http://helpforkids.bravehost.com

The Hideout - Learn what domestic violence is, how to help a friend, how to understand your feelings and what you can do. [UK hotline numbers]
http://www.thehideout.org.uk

TeensHealth: Abusive Relationships - Explains what abuse is, signs that you or a friend are being abused, and how to get help.
http://www.kidshealth.org/teen/your_mind/relationships/abuse.html

ChildHelpUSA: Kids Only - Identifies common types of abuse and provides a 24-hour hotline for children and teens who are being abused.
http://www.childhelpusa.org/resources/learning-center/for-kids

TeensHealth: Abuse - Explains how to recognize symptoms of abuse, identifies long-term effects, and tells where to get help.
http://www.kidshealth.org/teen/your_mind/families/family_abuse.html

How to Handle Abuse - Hitting, grabbing, and yelling can all be kinds of abuse. This site talks about what abuse is and what to do about it.
http://kidshealth.org/kid/feeling/emotion/handle_abuse.html