This report provides a comprehensive summary of Pennsylvania’s efforts to develop and integrate early childhood data systems. There is evidence that Pennsylvania’s data systems have created efficiencies and cost savings, and have enabled quality improvements in ways that otherwise would not have been possible. Although progress has been made, PA is still developing strategies for data use and has many opportunities to leverage existing data to further inform strategic investments, drive program integrity, guide supports for early childhood professionals, and support program accountability. This report outlines the history, uses and opportunities for Pennsylvania after ten years of system work.