I made magnets with the names of all of my students. At the beginning of the day, everyone's magnet is on a designated place on my chalkboard. It is the Boss's responsibility to remove the magnets of those children not following class rules. Anyone whose name is still on the board at the end of the day gets a sticker. My students love being "The Boss". It shows me that they know the rules and that they can behave for people other than me.