This document discusses using Positive Behavior Intervention and Support (PBIS) to manage challenging behavior in an In-School Suspension (ISS) classroom. It contrasts traditional discipline, which focuses on punishing bad behavior, with PBIS, which alters environments, teaches skills, and rewards good behavior. PBIS is effective because behavior is learned and has functions, so students need to be taught appropriate behavior. The document provides strategies for responding to misbehavior, such as modeling good behavior and giving clear choices. Finally, it discusses scenarios of misbehaving students and potential PBIS responses using de-escalation techniques.