I think it's important to have classroom rules and expectations up around the classroom so the students have reminders about acceptable behavior. I would probably hang this by a group work area in a classroom for a younger grade.
Good Reminders: 10 Ways to Sabotage Your Classroom Managment: If you are having classroom management problems, take a look at this article, which explains what NOT to do, and the more effective practices you should try instead.
Why don't grade school teachers implement this every year. I didn't know what type of learner I was until I was 30 returning to college. Helps me a lot now & my kids. Think how much more it could help others ~The Best (and Worst) Study Habits