Here are two great sites for teachers and parents to find resources for teaching kids about internet safety and digital citizenship.
Netsmartz.org from the National Center for Missing and Exploited Children has lots of videos, games, comics, quizzes and ideas for teaching kids about internet safety. Check out the nsteens.org for even more.
Also take a look at commonsensemedia.org. Here you will find videos and full lesson plans for teaching digital citizenship lessons on everything from safety to cyberbullying to copyright laws. Search for lessons by topic or grade level K-12. In addition to digital citizenship resources this site has reviews for popular movies, music, and games to let parent and teachers know what is appropriate for kids.