In this methodological illustration, we examined Tier 2 social skills interventions to support school success for students with or at risk for emotional or behavior disorders. We presented findings examining the usability and feasibility of the "Social Skills Improvement System -- Intervention Guide and Positive Action Counselor's Kit," which emphasize teaching and reinforcing social skills associated with success within and beyond school settings. We described how data-informed decision-making processes were conducted to design, implement, and evaluate social skills interventions, including monitoring student outcomes across the two programs. We end with a discussion of barriers and enablers toward conducting data-informed social skills interventions in authentic educational settings. [This paper was published in "Education and Treatment of Children" v42 n4 p489-514 2019 (EJ1229803).]