Under their Race to the Top - Early Learning Challenge (RTT-ELC) grants, States are revising existing or implementing new kindergarten entry assessment (KEA) tools. This document provides an overview of the assessment instruments currently in use or being developed by the 20 States that have been awarded RTT-ELC grants. It details which States are collaborating on KEA development, and it provides information on the time frames for developing and conducting the assessments. The information in this document is based on a review of State websites, RTT-ELC Annual Performance Reports, and a brief prepared by the Center on Enhancing Early Learning Outcomes (CEELO). (author abstract)