Seminole State College of Florida’s Interior. As the basis for its ranking, Schools.com used statistics from the Integrated Postsecondary Education Data System (IPEDS), which is the core postsecondary education data. The District of Columbia and the state of Louisiana have the "healthiest" charter school systems, while Oregon and Nevada have. In order to be included in the report’s rankings, states had to meet two criteria: at least 1 percent of…