The National Collaborative on Childhood Obesity Research (NCCOR; www.nccor.org) is a partnership among four major funders of childhood obesity research: the CDC, the NIH, the Robert Wood Johnson Foundation (RWJF), and the U.S. Department of Agriculture (USDA). Established in 2009, NCCOR focuses on improving the efficiency, effectiveness, and application of research through enhanced coordination and collaboration, in order to reduce rates of childhood obesity in the U.S. At its inception, NCCOR identified two goals as especially high priorities for advancing childhood obesity research: (1) increasing the knowledge and use of relevant data resources and (2) encouraging the use of highquality and comparable measures through improved access. Publicly available data resources related to childhood obesity are often underused because of lack of awareness of the breadth of existing surveillance systems. Previously, locatingpubliclyavailabledata resources foranalysiswasoften challenging for researchers, as there was no one central repository for this information. Instead, researchers often used systems with which they were already familiar or asked colleagues for recommendations; searched relevant bibliographic, government, and private resources; and/or used internet search engines to locate data systems. Finding measures also was challenging for researchers, and few studies used commonmeasures, making comparison of study results difficult. NCCORhas now created tools to assist researchers and practitioners in both of these areas to support more rapid advances in childhood obesity research. Improving the knowledge of and access to data resources across the socioecologic model will not only increase research efficiency but might also increase interest in multilevel research, which might, in turn, improve the understanding of environmental determinants of childhood obesity. Improving access to high-quality and comparable measures should strengthen the foundation for research on the causes of childhood obesity and for evaluation of obesityrelated policy and environmental changes.