Over the past ten years, enrollment in charter schools has increased by nearly 2 million students—and the number of school districts with a significant charter school presence continues to grow, too. When the National Alliance published the first edition of this report in 2006, only one district—New Orleans—had more than 30 percent of its students enrolled in charter schools. In 2017-18, 21 districts had at least 30 percent of their students attending charter schools.
