States have made tremendous progress in developing longitudinal data systems that can track student progress and answer critical policy questions. However, more work is needed, particularly on certain elements. Data on course-taking and grades (element 6), college readiness test scores (element 7), and other feedback from post-secondary institutions (element 9) can help determine whether high school courses and graduation standards are aligned with college and workplace expectations. However, states have made the least progress on implementing these three elements since 2005. This compendium provides a national overview on state progress towards implementing each of the 10 Elements and answering critical policy questions.