The purpose of this study was to examine the relationships between Marsick and Watkins' (2003) dimensions of a learning organization, Bandura's (1977, 1986) collective and self-efficacy, and teacher level of effectiveness (LOE) in a Rural Tennessee School District (RTSD). School districts invest significant amounts of time and resources to developing professional development with limited success, increasing the need to identify predictors that relate positively with teacher effectiveness. This study explored the ways in which school districts learn individually as teachers, in teacher-led teams, and as schools and districts. The researchers utilized data collected from a questionnaire (N = 41) that measured the dimensions, self-efficacy, collective efficacy, and teacher LOE, and conducted interviews with teachers (N = 24) and administrators (N = 6). Findings suggested the dimensions related to efficacy for student motivation, positive group competence and positive task analysis. Findings also suggested a small to moderate relationship between collective and self-efficacy. Researchers used hierarchical regression to measure the relationship between the two control variables (team learning and collaboration and collective vision) and collective and self-efficacy with teacher LOE. The qualitative analysis revealed four themes related to professional development and teacher effectiveness: diverse offerings, professional learning communities (PLCs), feedback, and mentoring. The study revealed that RTSD should expand the pilot program to remaining schools, include teachers in the development and implementation of professional development programs, include school and district leaders in how teachers select professional development options, and share exemplary work to build collective efficacy. [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.]