The purpose of this study was to interview and observe the principals selected to participate in the inaugural cohort of the North Carolina Distinguished Leadership in Practice ("NCDLP") program to understand what leadership practices they applied within their schools that positively impacted teaching and learning. The major research question for this study was, "How does a principal's leadership support high quality teaching and learning"? From this major research question, five guiding questions emerged to serve as integral components of this study: 1. What do distinguished principals perceive to be the relationship between the principal leadership and student achievement in North Carolina? 2. What are the leadership perspectives and outlooks of "NCDLP" principals that support high quality teaching and learning in their schools? 3. What are "NCDLP" principals doing to develop "leadership capacity" that support high quality teaching and learning in their schools? 4. What competencies within the School Executive Standards do distinguished principals perceive to be the most important in their leadership? 5. What School Executive Standards do distinguished principals perceive to be the most important to improve student achievement? Qualitative data were collected from semi-structured interviews, leadership surveys, and site visit observations with six principals. Member-checking, document analysis, and field observations of principals during regular and staff development days were conducted to collect data on the principals' leadership practice. The focus of both the interviews and site visits centered on descriptive questions which revealed information about the "hows" and "whys" of changes in principal leadership behavior following participation in the "NCDLP" program as well as the impact of the leader's practice on teaching and learning and organizational structures. Key findings revealed that principals are expected to play an active role in leadership, consider the processes, activities, and relationships within their school and use those factors to positively affect teaching and learning (Bottoms & Schmidt-Davis, 2010). Overall, the findings from this study suggest that principals who center their attention on developing the culture of the school and creating synergy of individual skills of teachers, learning relationships among teachers, a relentless focus on instruction, and ongoing mobilization of resources will make significant contributions to teaching and learning in a school. [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.]