This report presents data on remediation practices for incoming post-secondary students, collected from 33 states that participate in the Complete College America/National Governors Association Common Completion Metrics. The authors provide an introduction to remediation practices and a description of their methodology for studying outcomes, which is followed by an analysis and recommendations for making changes in state policy and practice. The guide is organized into three parts. The first section provides a national overview of problems with current remediation practices and provides examples of effective state efforts to improve those practices. The second section gives detailed data from the 33 states including enrollment, completion, and graduation rates for 2- and 4-year colleges. Lastly, the third section provides state profiles and individual recommendations for those states.