This study investigated the relationship of Executive Professional Leadership of principals in the elementary schools of Texas with specific factors which influence the quality of instruction. The primary purpose was to determine the significance to which the level of Executive Professional Leadership correlates with teacher morale, teacher performance, school organizational climate, and selected personal attributes of the elementary school principal. This study concluded that the elementary school principal who is effective in motivating his staff and improving its standards and performance in teaching (1) creates a social climate conducive to the development of high morale in the teachers, (2) sets the standard of behavior expected of his staff, (3) creates the kind of organizational climate conducive to the development of a quality school program, and (4) has the ability to effectively handle delicate situations such as complaints by parents and problems of discipline. Also, this study concluded that (1) experience in elementary teaching, (2) level of self-assessment as an educational leader, (3) internalization of the professional leadership definition, and (4) importance of routine administrative functions have no bearing on the elementary school principal's effectiveness in motivating his staff and improving its standards and performance in teaching.