As elementary school principals increase efforts to stimulate school‐based development, they face complex and often conflicting choices about ways to make decisions, strategies to support teacher development, and approaches that foster a constructive working environment. This paper examines how forty‐six elementary principals respond to tensions in an inservice program designed to facilitate their leadership development through participation in school improvement projects. Most view tensions as problems to solve [as comptrollers, accommodators, or processors]; a few live as provocateurs and construe tensions as dilemmas to manage. The effectiveness of school‐based development depends on the capacity of principals, in concert with their teachers, to understand and consistently cope with tensions that emerge as they try to improve their individual and collectives practices.