The purpose of this project was to investigate the effectiveness of Check-in/Check-out (CICO), a targeted behavioral intervention, on reducing the problem behaviors of kindergarten students in an urban setting. Participants were referred by their teacher for exhibiting disruptive classroom behaviors, which resulted in classroom removal. Results indicate that CICO led to a reduction in off-task behaviors and an increase of on-task behavior for both students. This study provides support for the practicality of school support personnel as the primary interventionist using CICO.