Frequent Suspensions

Success Academy is the city’s largest charter school network. It has 34 schools, and plans to grow to 70 in five or six years.

The network serves mostly black and Hispanic students and is known for exacting behavior rules. Even the youngest pupils are expected to sit with their backs straight, their hands clasped and their eyes on the teacher, a posture that the network believes helps children pay attention. Ms. Moskowitz has said she believes children learn better with structure and consistency in the classroom. Good behavior and effort are rewarded with candy and prizes, while infractions and shoddy work are penalized with reprimands, loss of recess time, extra assignments and, in some cases, suspensions as early as kindergarten.

Charter schools are privately run but publicly funded and admit children by lottery. Similar to a traditional public school, a charter school must provide a seat to a child who has enrolled unless the student withdraws, is expelled, turns 21 or moves out of the state. Charter schools must follow strict guidelines before formally expelling any student, and Success has done so only once since its first school opened in 2006. But Success’s critics accuse it of pushing children out by making their parents’ lives so difficult that they withdraw.

Suspensions at Success, which typically last one or two days, are frequent compared with traditional public schools. In the 2012-13 school year, the most recent one for which state data is available, Success schools suspended between 4 percent and 23 percent of their students at least once, with most suspending more than 10 percent. According to the most recent statistics from the city’s Education Department, from 2013-14, traditional public schools suspended 3 percent of students that academic year.

Ms. Moskowitz has said that suspensions can make parents recognize the seriousness of their children’s misbehavior and that removing students who are acting dangerously from the classroom protects teachers and allows them to do their jobs more effectively.

Principals at Success, many in their 20s and 30s, frequently consult with a team of lawyers before suspending a student or requiring a parent to pick up a child early every day. It was a member of that team who described a student’s withdrawal from the Success Academy in Union Square to colleagues as a “big win,” the current employee said.

James D. Merriman, the chief executive officer of the New York City Charter School Center, a group that advocates and supports charter schools, said it was unrealistic to expect any given school to be a good fit for every child. And Mr. Merriman noted that the city had many traditional public schools that required a test or other screening for admission, schools that by definition did not serve all students.