The Data Quality Campaign is a national, collaborative effort to encourage and support state policymakers to improve the collection, availability and use of high-quality education data and to implement state longitudinal data systems to improve student achievement. The campaign aims to provide tools and resources that will assist state development of quality longitudinal data systems, while also providing a national forum for reducing duplication of effort and promoting greater coordination and consensus among the organizations focusing on improving data quality, access and use. To these ends, four site visits were conducted in the spring of 2006 to state education agencies (SEAs) to gather information on their experiences in developing statewide longitudinal data systems: Florida, Utah, Virginia, and Wisconsin. The Virginia Department of Education (VDOE), featured in this report, oversees 132 public school districts (divisions) in which over 1.2 million students were enrolled in the 2005-06 school year. Public school students in Virginia participate in the largest on-line assessment program in the country. Under the umbrella name of Education Information Management System (EIMS), the VDOE has set priorities to meet state and federal reporting requirements and enable stakeholders at all levels of education to make informed educational decisions based on accurate and timely information. Recommendations for future development are included.