This report evaluates the quality of the K-12 civics and U.S. History standards adopted by the fifty states and the District of Columbia as of May 1, 2021, based on their content, rigor, clarity, and organization. Reviews were conducted by a bipartisan team of veteran educators and subject-matter experts with deep knowledge of civics and U.S. History. Some key findings are as follows: (1) Five jurisdictions (Alabama, California, Massachusetts, Tennessee, and the District of Columbia) were rated "exemplary" in both subjects; (2) Another ten states were rated "good" in both subjects; (3) Fifteen states were rated "mediocre" in at least one subject; and (4) Twenty states were rated "inadequate" in both subjects. The great purpose of civics and U.S. history education is to provide a common framework for resolving our differences even as we respect them--that is, to manage peacefully and constructively the eternal balancing and rebalancing of "pluribus" and "unum." This report is one step in that direction. [Foreword written by David Griffith and Chester E. Finn, Jr. This report was written with Amber M. Northern.]