Given the high prevalence of Tier 2 behavioral intervention use and calls to examine mediation and moderation effects on treatment for children, this study tested the mediation effect of the daily progress report and moderation effects of coach-student, teacher-student, and student-teacher relationships and their interactions for 95 elementary school students who received the Check, Connect, and Expect intervention. The only significant finding was the moderating effect of the student-teacher and teacher-student relationships. A significant interaction between the moderating effects showed that a positive student-teacher relationship showed overall reductions in total problem behavior across an academic year. This result is interpreted as students' perception of a positive relationship with their teacher as critical to the therapeutic mechanism of Tier 2 behavioral interventions.