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 Florida Department of Education (FDOE) oversees 67 county-wide public school districts, encompassing almost 4,000 schools, in which over 2.6 million students were enrolled in the fall of the 2005-06 school year. Florida has a long history of collecting a multitude of data on its public education system and was one of the country's pioneers in collecting student-level data.