Success Academy is calling it “a moral imperative” to double student enrollment in charter schools, from 100,000 to 200,000 students.

It is hard to see a moral imperative in a charter sector that steers high-needs students out the door. Success Academy may start with large classes in the early grades, but year after year classes get smaller as students leave or are pushed out and then not replaced with new students.

Charters also have benefited from poor oversight and lax regulation that have allowed charter schools to rely more and more on uncertified teachers. Success Academy’s record of imposing harsh and humiliating disciplinary measures on students has been well-documented by the media.

The latest data comes from CityLab, an online policy magazine published by The Atlantic. In September, CityLab found that in New York City, though the charter school student population represents just less than 7 percent of the district’s total, charter schools accounted for nearly 42 percent of all suspensions in 2014, the most recent available state data.

CityLab went further, finding that nearly all of the charter suspensions were concentrated in majority-black communities, particularly in Harlem in Manhattan and in Crown Heights, Brownsville and East New York in Brooklyn. It’s no wonder that this summer, both the NAACP and the Movement for Black Lives called for a moratorium on charter schools nationwide.

Here in New York City, the expansion of charters schools has already taken a toll on our schools. We see it in the drain on public school funding, coupled with the fact that the city is on the hook to provide facilities for charter schools. Co-locations, in which charter schools take over entire floors, have displaced our students from classrooms, art studios and rehearsal space. Many of our schools are overcrowded. We simply don’t have enough space to turn over to charters.

Instead of expanding charter school enrollment for the few, the state should fulfill its primary obligation to all of the children of New York and provide the $1.6 billion in funds that were ordered by the court as part of the Campaign for Fiscal Equity settlement. That is the clear moral imperative.