This first-ever look at the national charter school pipeline--what schools are being proposed and by whom--reveals a diverse sector, with a tremendous variety of applicants and school models. Working with Public Impact, National Association of Charter School Authorizers (NACSA) collected and analyzed nearly 3,000 charter school applications submitted to authorizers, located in 20 states, that oversee nearly two-thirds of all charter schools nationally. The analysis shows the significant impact authorizers have in shaping the public education landscape across the country.