Child Stats.gov is a website maintained by 22 federal agencies that provides up-to-date statistics on child well-being in categories like health, behavior, education, and family environment. Kelly Adams presented on a longitudinal study from 2010-2011 that assessed children in kindergarten and not in kindergarten on reading, math, and science skills, with a hypothesis that kindergarten plays a major role in cognitive development as shown by higher assessment scores. The research method examines differences in assessment results between pairs of same-age children from the same demographic, with one having attended kindergarten and one not.