The purpose of this study was to examine the relation between "district capacity" as measured by the District Capacity Assessment (DCA) and the "initial, depth, scale," and "sustained" implementation of an evidence-based practice (EBP), Positive Behavior Interventions and Supports (PBIS). This exploratory analysis also examined the internal structure of the DCA and how district-level context may influence the overall DCA score. Results from the study showed a positive relation between DCA scores and Tier I (i.e.,"initial") and Tier II (i.e., "depth") of PBIS implementation. While this study did not provide conclusive evidence between the DCA and all aspects of PBIS implementation, it does provide implications for future inquiry into the study of "district capacity." The discussion will review the findings, overview the limitations, discuss the implications of the results, and provide future directions for researchers, policy-makers, and practitioners interested in the further study of district capacity. [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.]