A growing number of organisations--universities, non-profits, independent consultants--are emerging as partners to school systems pursuing systemic improvement. This proliferation invites questions probing the interaction between school systems and their consulting partners. Drawing on a cross-disciplinary review of literature, this theoretical paper (1) explores the processes and strategies used by consulting organisations as partners to school systems and (2) proposes a conceptual framework as a starting point for implementation and evaluation of effective consulting for systemic improvement.