The document discusses various causes of disruptive behavior in classroom settings from both teacher and student perspectives. It identifies factors like time of day, student attitudes, desire for attention, boredom, and external factors that can influence student behavior. It also discusses the role of the teacher in preventing problems through enthusiasm, professionalism, building rapport, and having a clear code of conduct. The document provides guidance on how teachers should respond to disruptive behavior, such as acting immediately, focusing on the behavior not the student, treating students fairly, keeping calm, and seeking guidance from colleagues.