Evaluation of educational programs in zoos and aquariums is a growing area of interest for researchers and professionals. In this review, the authors examine the literature that focuses on these settings. They then discuss evaluations that have been conducted in institutions accredited by the Association of Zoos and Aquariums in relation to knowledge, attitude, and behavior changes in visitors and program participants. The authors also address the motivations for evaluation as well as the constraints and barriers frequently cited in the literature. Last, the authors discuss adaptive management strategies at these institutions as a result of evaluation practices.