“…Their leadership directly influences the general effectiveness of the school, the teachers' motivation and commitment, the working conditions, the delegation of power within the organization, and the school's culture (Bouchamma, 2011;Collerette, Pelletier, & Turcotte, 2013;Hallinger & Heck, 1998;Marzano, Waters, & McNulty, 2005;Pont, Nusche, & Moorman, 2008;Robinson, 2007;Spanneut, 2010). And yet, despite the emergence of inclusive education in several countries, the principal's leadership remains far from understood in contexts of diversity (Bouchamma, 2008(Bouchamma, , 2011Lambert & Bouchamma, 2019). The study of Branch, Hanushek and Rivkin (2012) noted the low presence of quantitative studies in the field of leadership, despite its effect on academic success.…”