This document discusses partnering with practice-based research networks (PBRNs) to conduct research. It describes PBRNs as groups of primary care practices that collaborate to research questions related to community practice. There are over 150 PBRNs across the US involving nearly 17,000 practices. The document highlights the Oregon Rural Practice-Based Research Network as an example, which involves 49 practices caring for over 235,000 patients. It emphasizes that PBRNs allow important questions about real-world clinical practice and quality improvement to be studied using communities as laboratories.