This study offers a blueprint for the development, implementation, and assessment of a civic education program through a cooperative, iterative process. It explores the evolution of the James Madison Legacy Project Expansion during its formative stages. The Center for Civic Education was responsible for the implementation aspects of the JMLPE which involved updating and adapting the We the People: The Citizen and the Constitution (WTP) curriculum for the three student populations while designing and providing teacher professional development (PD). Georgetown University's Civic Education Research Lab simultaneously conducted research on the JMLPE that informed the implementation process.