The most useful part of this for me was the concept of the acting out cycle (calm to trigger to agitation to acceleration to peak to de-escalation to recovery). Colvin, especially in the acceleration and de-escalation sections, does a great job of describing student behavior and teacher options. There are a lot of checklists and forms to help teachers and administrators out, and I found these somewhat generic. I adapted one for my use, and I'm guessing most teachers would do the same. If you are looking for a resource that emphasizes de-escalation in student/teacher interactions, I think this is a good place to start.