This tenth edition of "Measuring up to the Model: A Ranking of State Charter School Laws" presents the latest activity in charter public school legislation across the country. This report evaluates each state's public charter school law against the 21 essential components of a strong charter school law. These 21 components are drawn from the National Alliance's "A New Model Law for Supporting the Growth of High-Quality Public Charter Schools: Second Edition" (ED613003). Key takeaways include: (1) For the fourth year in a row, Indiana has the nation's strongest charter school law in the country, ranking No. 1 (out of 44); (2) Georgia made the biggest jump in this year's rankings, moving up 11 spots from No. 27 to No. 16; (3) New York experienced the largest drop in this year's rankings, falling from No. 14 to No. 17; (4) The Top 10 includes a mixture of states with more mature movements (Indiana at No. 1, Colorado at No. 2, Minnesota at No. 4, Florida at No. 7, D.C. at No. 9, and Nevada at No. 10) and states with newer movements (Washington at No. 3, Alabama at No. 5, Mississippi at No. 6, and Maine at No. 8); (5) States that are enacting laws for the first time and states that are overhauling their laws are bypassing states that were previously more highly ranked, such as Arizona, Louisiana, and New York; and (6) Maryland has the nation's weakest charter school law, ranking No. 44 (out of 44). The purpose of the analyses is to encourage state laws and regulations to require best practices and guarantee charter school rights and freedoms so that state charter school movements will benefit from a supportive legal and policy environment. [For the ninth edition, see ED581592.]