Children with oppositional defiant disorder (ODD) are noncompliant and verbally and physically aggressive, and they may have frequent, severe temper tantrums. Because ODD has such a high prevalence rate, educators are likely to find children diagnosed with ODD in their classrooms. The authors of this article review research concerning the causes of ODD and the antecedents that trigger oppositional and defiant behavior. Drawing from clinical experience, the authors present a model to alter these antecedents and offer a wide variety of practical techniques for preventing and responding to oppositional behavior in the classroom.