The social information processing (SIP) model, which involves a sequence of six cognitive processing steps, is frequently used by researchers to understand proactive and reactive aggression in youth; however, there has been little discussion in the literature regarding the application of the SIP model in school counseling. This article presents a review of the SIP model followed by a brief summary of the research regarding the relationship between SIP deficits and aggression. Counseling interventions related to each of the SIP steps for use with proactive and reactive aggressive youth are also presented.