“…With its early roots in transformational leadership theory (Podsakoff, MacKenzie, Moorman, & Fetter, 1990), this model has been subject to considerable testing with original empirical evidence (e.g., Leithwood & Jantzi, 1999a, 1999b, 2000a, 2000b and has gradually evolved to include, as well, central elements of instructional leadership. It is now an "integrated" model (Printy, Marks, & Bowers, 2010) widely used by other researchers to help frame their inquiries (e.g., Hendriks & Scheerens, 2013) and by some large education systems to guide their leadership policies (e.g., Ontario; see Leithwood, 2012) This study is the latest in a series aimed at systematically broadening and deepening the evidence about this integrated leadership model. These studies strive to move beyond the original empirical data used in the development and evolution of this leadership model.…”