Though Color charts can work for the mostly-behaved child, it is entirely ineffective for children who are extremely impulsive, oppositional, etc. What do you do for a child who gets on red at 9AM? What motivation does that child have to pull-it together? So many kids just can't go an entire day perfectly....and if teachers hesitate to assign colors for transgressions, then the system is moot. Of course, teachers do need tools to manage their ever-growing classrooms. I like 123Magic For Teachers....it's a much more effective system for the impulsive kids and is constantly giving kids a chance to start over.