A growing number of states are interested in tracking the readiness of children entering kindergarten. In 2010, just seven states (Alaska, Connecticut, Florida, Hawaii, Maryland, Minnesota, and Vermont) collected Kindergarten Entry Assessment (KEA) data for the purposes of aggregating data at the state level. Since this time, most states report they are using statewide, piloting, developing, or revising their KEA. At the request of a state early education administrator, the Center on Enhancing Early Learning Outcomes (CEELO) developed a national scan on the current assessment tools that are used in states to assess the development of children at kindergarten entry. This information could be useful to other states that are in the process of developing or revising their KEAs.