I like the idea of a Behavior Log. Students are responsible for logging in their color change and the reason why. Will be good to have on hand as a reference for parents, administers, etc. From--A Day in the Life of a Classroom Teacher: Classroom Tour
While I'm not sure I've ever heard someone say teaching is a walk in the park (probably because if they know me even a little bit, I'd bite their heads off like a velociraptor.), I think the Jurassic Park metaphor is apt.