Three things that I would want to make sure your students understand about being good digital citizen would be:
1. Establish Clear Expectations – If your students know what is expected of them – what to do, how to do it, and when it’s due – This will empower them to meet their objective.
2. Personal Responsibility - Make sure they are aware of the potential consequences of their online actions.
3. Students should also understand that they are responsible for what they produce and that they should support and protect their resources and the resources of others that they use.
One resource that I plan to use instructionally is the Texas School Safety Center
Presently, I have a unit that I teach that incorporates digital citizenship including cyber bullying.
I can share the idea of digital citizenship with parents by having the students take home a journal from the unit covered in class and for an additional grade for homework, they will need to have a signature from the parent stating they have read the student's journal of digital citizenship.