Building on the work of the Data Quality Campaign, this brief recommends that the federal government convene a national advisory group, made up of policymakers, educators, researchers, and technical experts to develop guidelines that will help states create longitudinal data systems for PreK-3rd Grade. The group should help states in three key areas: Fully integrating PreK data from both public and private programs into state longitudinal data systems; Designing and implementing three distinct "electronic gateways" or "portals" to make appropriate levels and types of information available to a variety of stakeholders; and Revising laws and regulations to maintain student confidentiality while ensuring easy and timely access to information. (author abstract)