The Data Quality Campaign (DQC) 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 help states learn from one another, DQC staff visited state education agencies which are engaged in different stages of development of their longitudinal data systems. In 2006, staff visited Florida, Utah, Virginia and Wisconsin; 2007 meetings were held in Massachusetts and South Carolina. The DQC will continue to highlight specific state efforts to develop and use longitudinal data systems, and will conduct additional case studies in 2008. As of the 2007 Data Quality Campaign (DQC) annual survey of state longitudinal data systems, Massachusetts has implemented eight out of ten essential elements. The only elements the state has not implemented include the ability to connect teacher and student data together and a system to track which courses students take along with their completion status (e.g., grade or pass/fail status) in those classes.