Education Alberta (Canada) has published a Development guide for Digital Citizenship Policy. This is an extensive document which includes some of my work and that of my esteemed colleague Dr Jason Ohler.
This is a great resource and well worth downloading and working through. It is about 80+ pages so you do need to put aside a little time to do this.
Check out their internet safety page - http://education.alberta.ca/admin/technology/standards/internetsafety.aspx