As educational partnerships and collaboratives have become more popular in the last several decades, researchers and practitioners have sought to understand why these arrangements flourish or flounder. Taking into consideration the contextual factors affecting partnerships, we have conceptualized a framework of the types of partnerships that can develop between a school system and an external resource agency. The framework reflects the dynamic nature of partnerships, including the growing complexity of interorganizational arrangements that exist as partnerships move from a cooperative to a collaborative relationship. We conclude by discussing the value and utility of this framework as school districts and external agencies consider establishing short- or long-term partnerships. (Contains 1 figure.)