One more idea while my attention wanders from writing the exam for tomorrow morning: why do large school systems rotate administrators on the principle that they “need experience in a range of settings” for leadership purposes and then keep new teachers in the same school year after year? Who needs more rotation through a range of settings? In which case would rotation provide better evidence that student outcomes are not the result of selection effects?
Full-credit answers require coherence, avoidance of tangents, and reference to relevant research. Oops. Sorry. Thinking about that exam, obviously.