Teacher attrition is a main contributor to teacher shortages; providing effective professional development leading to increases in self-efficacy, reflective capacity, and job satisfaction may support teacher retention. Effective professional development, self-efficacy, reflective practice, and job satisfaction are all directly related to teacher retention. This study evaluated the Missouri Teacher Academy, which is a state-level program implemented to provide effective professional development for teachers. The study evaluated the impact of Missouri Teacher Academy on level of teacher (a) self-efficacy, (b) reflective capacity, and (c) job satisfaction. Results indicated statistically significant differences in teacher self-efficacy, reflective capacity, and job satisfaction scores before and after the intervention. [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/en-US/products/dissertations/individuals.shtml.]