There is a paucity of selective, Tier 2 interventions that educators can implement for students with internalizing problems as part of their schools' Multi-Tiered Systems of Supports. To fill this void, the authors' purpose was to evaluate the efficacy, acceptability, and integrity of a structured school-based mentoring program, the Courage and Confidence Mentor Program (CCMP), for elementary students. A single-case experimental multiple baseline design across participants was used to evaluate the efficacy of the CCMP with 6 students. Visual analysis of the results and single-case effect size estimates revealed that all but 1 of the participants demonstrated noticeable reductions in internalizing problems as measured by teacher-completed direct behavior ratings. Findings were confirmed by other dependent variables gathered from students and teachers. Limitations of the methods and directions for future research involving Tier 2 interventions for elementary students with internalizing problems are discussed.