Students should know several things about good digital citizenship.
1. Respect on'line privacy. Keep passwords secret. Be careful in sharing personal information. Be careful what comments, photos, and videos you post. Once it is on the internet , it never really goes away.
2. No cyberbullying!
3. Just because it's on the internet doesn't make to true. Use multiple sources. Learn to evaluate who is sponsoring the web site.
http://www.commonsensemedia.org/educators is an excellent site to find information and being a good citizen. There are helpful lessons to educate the students. There are also lesson to help parents.
Students need to be aware of what is expected of them on line. Written instructions signed by both student and parents should on file.