This article will argue that diverse national, regional and local contexts leave different rooms for manoeuvre for school principals. The social technologies applied by the authorities (like accountability systems) can be "tight" or "loose" and so leave little or much room for principals' interpretations of what a good school…

Pressing questions about the merits of full-fledged market accountability in K-12 education, and more limited choice programs, have spawned a large scholarly literature. This article assesses what we know from the most prominent studies and the importance of those findings to school system reform discussions. The studies most widely cited in the…