The Charter School Performance Breakout
But do they get results? Initial assessments were mixed. In the early days, charter authorizing was very loose, nobody knew what worked best, and lots of weak schools were launched. The system has since tightened. In Washington, D.C., for instance, seven out of nine requests to open new charters are now turned down, and 41 charters have been closed for failing to produce good results.
Nationwide, 561 new charter schools opened last year, while 206 laggards were closed. Unlike conventional public schools, the charter system allows poorly performing schools to be squeezed out.
As charter operators have figured out how to succeed with children, they are doubling down on the best models. Successful charter schools have many distinctive features: longer school days and longer years, more flexibility and accountability for teachers and principals, higher expectations for students, more discipline and structure, more curricular innovation, more rigorous testing. Most charter growth today is coming from replication of the best schools. The rate of enrollment increase at high-performing networks is now 10 times what it is at single-campus "mom and pop" academies.
The combination of weak charters closing and strong charters replicating is having powerful effects. The first major assessment of charter schools by Stanford's Center for Research on Educational Outcomes found their results to be extremely variable, and overall no better than conventional schools as of 2009. Its follow-up study several years later found that steady closures and their replacement by proven models had pushed charters ahead of conventional schools. In New York City, the average charter-school student now absorbs five months of extra learning a year in math, and one extra month in reading, compared with counterparts in conventional schools.