It is important to craft your school's AUP long before your network is in place. More importantly, by having a document that is distributed to and possibly signed by every user, you can use this as an opportunity to educate every user on the potential and pitfalls, and to provide guidance for kids and parents.
Some schools have separate policies for teachers and students.
Expectations should be the same. Teachers can model appropriate behavior, and everyone will be more likely to own and adhere to the policy if they've written it together and have the same consequences and expectations. All Rights Reserved.