This inquiry focuses on the "overall instructional leadership" approaches used by exemplary principals in three high performing Canadian provinces to overcome three persistent obstacles to effective teacher supervision and evaluation: (a) the management challenge, (b) the complexity challenge, and (c) the learning challenge. Analysis of data collected from interviews, focus groups, observations, field notes, documents, artifacts, and reflective research journals yielded the following four "assertions": (a) Shared, distributed, and collective approaches to overall instructional leadership deepen and widen impact. (b) Effective supervision and evaluation are part of a career-long continuum of practice that fosters teacher growth while ensuring quality teaching. (c) There are multiple learning pathways to effective overall instructional leadership. (d) Policy contexts that place teacher supervision and evaluation practice within a broader conception of overall instructional leadership are beneficial.