Setting the Tone: A Connected School Approach to Creating Bully-Free Classrooms. This book builds on the work of both Perceptual Control Theory (PCT), and Olweus Bullying Prevention program. To prevent bulling, educators need to shift their thinking, shift their actions, and start modeling noncoercive intervention. This book asks educators to self-evaluate their present beliefs and practices in light of the latest research on behavior and bullying prevention.