This mixed methods case study utilized the conceptions of a program evaluation to investigate the Primary Mathematics Specialist Teacher Professional Development pilot project, to provide clarity on the implementation, and to inform the program manager, the Ministry of Education, and school leaders of the effectiveness of the professional development. The researcher utilized five different instruments to collect data including test scores, observation protocols, interviews, field notes and document review. Participants in this study represented a multi-level sampling approach. The findings indicated that administrators, coaches and teachers perceived the implementation of the professional development as positive and appeared to improve students' skills to learn mathematics in all four schools. Furthermore, teachers valued and appreciated the support from coaches as they expressed how they fostered a professional relationship where collaboration was heightened through coteaching, modelling, dialogue, feedback, and common planning. The overall benefit of the professional development was significant as teachers changed their beliefs about mathematics practices which further enhanced students' interest, confidence, and participation and holds promise for the future of the schools and effect on student learning. However, if teachers were more involved in professional development decisions and their needs and interest were considered, the results would have been more positive. The findings from this study support previous research that utilized the transformative learning theory to investigate adult learning. Given the pilot status of this implementation, these findings offer in sight to initiate discussion between the Ministry of Education and the program manager to expand the program to other schools. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]