The purpose of the District Capacity Assessment (DCA) Technical Manual is to provide background information on the technical adequacy of the DCA (Ward et al., 2015). This current version draws upon a rich history and background of previous work assessing district capacity. Notably, the current version includes significant modifications from earlier iterations including revised items, a rubric for scoring and a glossary of terms. This version of the DCA was released in the spring of 2015 following a thorough development process and early validation work resulting in a high quality assessment of district capacity for implementation of effective innovations. Validity evidence collected during the assessment development process is rarely obtained and when it is obtained it is not often presented in detail (Carretero-Dios & Perez, 2007). This technical manual details the development process to date, the validity work that has been completed, usability testing efforts accomplished and an outline of next steps to continue the work to a fully established assessment for local education agencies (LEAs). [This paper was developed in collaboration with Michigan's Integrated Behavior Learning Support Initiative (MIBLSI).]