ISM has studied the interrelationships among executive leadership, well-being, and school performance. In the previous three articles in this series, we have confirmed: ISM’s existing measure of executive leadership and the Head’s level of flourishing correlate with key school performance variables (school stability, financial strength, enrollment demand, and faculty culture); that neither the School Head’s experience in the field of education nor cumulative experience as School Head is related to the key school performance variables. There is no evidence a school improves with the Head's experience.The Head’s current length of tenure, however, was correlated with the school’s financial strength; enrollment demand is related to the strength of leadership and well-being of the School Head; and, the School Head’s level of professional support and well-being significantly influences the faculty culture—a central construct that enhances the student experience and the enrollment management process.