This study was designed to extend the research on tootling interventions, which involves reinforcing students' reporting of their peers' incidental prosocial behaviors. Specifically, a withdrawal design was used to determine if a tootling intervention decreased antisocial/disrespectful interactions of four, teacher-nominated students in an after-school, third-grade classroom. Visual analysis of a repeated-measures graph and effect size estimates suggested that the tootling intervention decreased these interactions. Discussion focuses on future research designed to evaluate the generalizability of tootling interventions and the effects of similar interventions over time and across dependent variables.