As teachers become increasingly positioned as change agents in educational and social transformation, they need continuing professional development (CPD) to support their transition to this new role. Recent innovations in the objectives and processes of CPD programs have responded to this need, but less work has focused on program evaluation. This paper presents the development and application of an evaluation framework within a CPD program in sustainability education. The results demonstrate the value of the framework for investigating how the intentions and expectations of participants and instructors shape experiences and outcomes of CPD programs.