English-language learners are in every state, most school districts, and many classrooms. At 10 percent of the nation's public school population and growing, education policymakers in every state need to be attuned to their needs. So argues a new policy brief from the Education Commission of the States. In the brief, ECS describes the prevalence of English-learners and the diversity of the population, which varies greatly state by state. The brief then outlines a number of areas where policy actions could help educators better support the success of ELLs.