This paper discusses the development and validity of a self-administered survey to assess the nutrition and physical activity environment of child-care centers. The survey assesses four areas related to nutrition and physical activity: center policies, practices related to the social environment, physical environment and nutrition quality. To evaluate criterion validity of the survey, researchers compared survey data to data collected through in-person interviews and direct observation. The self-report survey demonstrated adequate criterion validity for evaluating the child-care nutrition and physical activity environment. Agreement was highest for nutrition and policy domains and lowest for physical activity and barriers to promoting health.