While previous approaches to students? Problematic behavior focused on punishment and rehabilitation through the judicial system, traditional schools implementing Positive Behavioral Interventions and Support (PBIS) implementation report positive student outcomes. However, fewer studies provide insight to PBIS implementation in non-traditional educational settings. Greater understanding of PBIS implementation fidelity and elements influencing implementation fidelity is needed for non-traditional, Alternate Education (AE) settings serving at-risk students. To broaden PBIS implementation research in this area, this study described PBIS implementation fidelity at the Alternate Learning Center (ALC) a public separate facility. Through the lens of Carroll et al. (2007) conceptual framework of implementation fidelity, this research explored elements influencing PBIS implementation within ALC?s non-traditional educational setting. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]