Controlling Emotions is one of the most important traits of a healthy classroom. Showing your students new and healthy ways to control these emotions is a good way to keep a collected emotions and have outbursts at a minimum.
This is a good idea for behavior management in the classroom. In Beautiful Child, Torey dealt with a lot of problem behavior. This could be made in to a sign that would be hung in the "cool down spot" in a corner of the room. Although it may not work with every student, it could be helpful to at least one.