The theoretical model employed in this study was built on findings from prior research conducted on school leadership and teacher professional learning (e.g., Frost, 2006, Hallinger et al., 2014 and Li et al., 2016). Our model proposes that learning-centered leadership will have both direct effects and indirect effects, mediated by teacher agency and teacher trust, on the professional learning of teachers. The study tested this model to determine both the nature of leadership effects on teacher learning (i.e., direct, indirect or both) and to examine how dimensions of teacher trust and agency interact with principal leadership to produce these effects.