At the beginning of each year, I have conversations with my students about how we want our class to work. One of the tools I use is this one page worksheet students complete in small groups and bring back for a whole class discussion.
It is important to know that we all have rights and in setting up the class rules, we shouldn't interfere with other people's rights to learn and be safe. We all have responsibilities to make our class a good place to work.
Privileges are something people earn in my room. By consistently demonstrating respect and responsibility, some people show they can be trusted to work in the hall, have a night off of homework, or some other activity of their choice.