Serious antisocial behavior in children and adolescents poses significant challenges within educational settings and is one of the most important concerns facing educators today. The disorder of particular interest to the development of aggressive and antisocial behaviors in youth is conduct disorder (CD). Conduct disorder is characterized by patterns of behaviors whereby societal norms or the rights of others are consistently violated. Individuals with CD often misperceive intentions of others as hostile and threatening, and are more likely to initiate aggressive behaviors and react aggressively than their typically developing peers. This article examines important, yet minor, changes made in the "DSM-5" with reference to conduct disorder and implications for school psychology.