Check In Check Out (CICO) is one of the most empirically supported Tier 2 behavior interventions for students who require additional supports to experience success. CICO incorporates regular performance feedback and adult interaction throughout the day in alignment with school-wide expectations. Performance feedback includes both reinforcing and corrective functions and is provided several times throughout the day so that the student has an opportunity to adjust behavior for the next check-in period. Interactions between the student and adult are designed to be efficient, structured, positive, and consistent. Increasing positive student-adult interactions has been linked to improved positive adult-child relationships and may lead to improved student engagement, attendance, and work completion. Despite the benefits (e.g., inexpensive, effective), implementing and monitoring CICO in a systematic manner can be challenging. Building efficient and sustainable Tier 2 systems that can adequately support up to 15% of the student population requires a significant investment at the front end of the adoption process (e.g., staff, time allocation). Given that CICO is the most commonly implemented Tier 2 intervention, enrollment in CICO may be one indicator of a school or other agency's capacity to implement the intervention for up to 15% of students. Due to the lack of peer-reviewed research documenting the extent to which schools are providing CICO to proportions of students that match theoretical distributions (i.e., 5 to 15%), there is a need to develop an understanding of current patterns of CICO enrollment and its potential impact on intervention fidelity and effectiveness. A descriptive study investigating patterns of CICO use in schools was conducted by analyzing a multi-state database from CICO-SWIS, a subscription-based application that schools purchase to enter and track CICO data. The specific questions examined in this study were: (1) What are patterns of use of CICO in schools?; and (2) What variables predict the percent of students receiving CICO in schools?