Logic models have garnered acclaim for their usefulness and disdain for the time required to create good ones. We argue that the orderly, analytical nature of logic models is opposed to many Extension programs, and we explain developmental evaluation, an approach that highlights ongoing development, adaptations, and rapid response. We use our recently completed evaluation of the 4-H Science: Building a 4-H Career Pathway Initiative to demonstrate developmental evaluation’s key principles. Recommendations for Extension include the need to embrace developmental evaluation for program planning and evaluation and for Extension evaluators to conduct case studies using developmental evaluation and other approaches.

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