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.
Help Wanted bulletin board. Pockets with classroom job descriptions. Write student names on craft sticks and place them in appropriate pocket. Fun and easy way to switch up student jobs throughout the year.
Choose a stick with a student's name on it and put in your pocket before walking down the hall. This will encourage your students to walk quietly without reminders. If student chosen walks quietly they get a reward.