The purpose of the study was to examine how four different high schools within one school district implemented the AVID program. The researcher used a comparative case study model to examine the different sites' programs and how the program and program implementation varied by site. The research questions answered how the AVID program was implemented by site, whether the program was implemented with fidelity, and if there were factors that impacted program implementation. The AVID district coordinator, site administrators and site coordinators were surveyed to gauge the understanding of the AVID program, program implementation, and how AVID implementation impacts the program fidelity by site. AVID research suggests that the program works to address the needs of students from underserved populations and aims to help them access advanced academic classes and achieve more success within those college prep courses and school overall. This study may help school districts, school administation and AVID personnel better understand how site implementation impacts overall program success and to see how barriers impact the implemenation process at school sites. Findings included, some school-based administrators and site coordinators did not feel they implemented the AVID program with fidelity, site administrators' involvement with the AVID implementation was inconsistent, most site administrators knew nothing about the specific rating of the AVID Coaching and Certification Instrument (CCI) or the measurement overall. Other findings were AVID site coordinators completed the AVID CCI and coordinated all aspects of the process and AVID implementation at the sites, site coordinators perceived that they implemented the AVID program with the most fidelity possible within their respective "means" but not with fidelity. Further, schools implemented the AVID Domains with varied degrees of fidelity according to the AVID CCI and each site had a unique implementation of the AVID program. / Doctor of Education / Advancement Via Individual Determination (AVID) is an educational program that aims to help underserved students learn how to successfully access classes that helps prepare them for college. The AVID program is offered in some schools to aid students in the academic middle through instruction, tutoring, and structures to learn how to be successful in honors courses within the middle and high school levels. School leaders need to understand how well AVID programs are being implemented within their school to ensure that the program can be the most successful to reach the students well. This research study looked at four AVID schools to see how well they implemented the AVID program in comparison to how it should be done, the role school administration had in the implementation, and how implementation differed at schools. The study used information from the AVID Coaching and Certification Instrument (the AVID report card), to see how the school scored and each AVID site administrator (building principal) and AVID site coordinator (the person who runs the AVID program at the school) were interviewed and asked several questions to better understand the program at each school, the role the site administrator and site coordinator played in running the program and how well the AVID staff understood how well the school did with the program at their school. The study found that schools implemented their programs differently, that the AVID principals did not feel they ran the program as it should be, and that most of the AVID principals did not know what the AVID CCI was or how their school scored. The AVID site coordinator was responsible for running AVID at the school, they ran the AVID program as well as they could but not as it should be.