I have used these posters in my classroom to help with classroom management during group activities like math centers and Daily 5.
I have laminated the signs and written the students in each groups names on the lines. Then I have attached a clothespin to the bottom. I move the clothespin to yellow or red if a group is not following the expectations for group work. The students can always move back to green for showing improvement! The stoplights can also be used to regulate volume levels for group work.
I hope you will be able to use these wonderful management tools in your own classroom!