An effective principal is one who has the ability to galvanize people toward a common goal and motivate them to use their gifts and talents. It is understood that it takes more than willpower to be an effective school leader. It takes knowledge, vision and commitment to lead a school community toward academic success. The leadership of a school principal is more dynamic when they realize that their role as an influencer is greater than the title alone. As an influential leader, the principal's work helps to create within their staff members' optimism about what they can successfully accomplish in hopes of producing a favorable outcome. This concept of believing in one's ability to achieve goals regardless of challenges that may be encountered is known as self-efficacy. The impact of teachers' sense of efficacy has long been studied by researchers to gain an understanding of teachers' feelings about their professional beliefs on multiple aspects of school life. The purpose of this study was to identify the impact of specific principal leadership behaviors on a teacher's sense of self-efficacy. Three research questions were used to guide the focus of the research, which were: (1) To what extent do particular leadership qualities affect a teacher's sense of self-efficacy? (2) Which leadership qualities promote the strongest sense of teacher efficacy? (3) To what extent does a teacher's sense of efficacy relate to their level of motivation? The study's findings delineate which specific leadership behaviors are most impactful on a teacher's sense of self-efficacy and motivation for Pre-kindergarten through fourth grade teachers in Oratam Public Schools. The study also reveals the teachers' perceptions about their school leaders and the effect of those perceptions on their journey as educators. It is the researcher's belief that this study will be beneficial to the development of principal leaders and to building positive relationships between administrators and teachers. The researcher also hopes that a review of these findings will further a principal's capacity to be impactful as they learn what matters most from the multiple perspectives of teachers. [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.]