Chalkbeat uses state data to report on high suspension rates at many charters, where strict discipline is prized.

“New York City charter schools suspended students at almost three times the rate of traditional public schools during the 2011-12 school year, according to a Chalkbeat analysis, though some charter schools have since begun to reduce the use of suspensions for minor infractions.
Overall, charter schools suspended at least 11 percent of their students that year, while district schools suspended 4.2 percent of their students. The charter-school suspension rate is likely an underestimate because charter schools don’t have to report suspensions that students serve in school.

“Not all schools had high suspension rates. One-third of charter schools reported suspending fewer than 5 percent of their students, and many schools said they did not give out any out-of-school suspensions. But 11 charter schools suspended more than 30 percent of their students — a figure likely to draw added scrutiny amid a nationwide push to reduce suspensions and a debate over allowing more charter schools to open statewide.”