Leadership coaching is now seen as a valuable tool to assist school leaders. Through a survey of school principals, this study identified specific coaching competencies used by leadership coaches that were perceived by principals to influence key best practices for schools. These best practices have in turn been correlated to increased student achievement in the literature. The findings have been incorporated into an instrument that can be used by coaches and clients to focus and refine their work together. (Contains 1 figure and 8 tables.)