Parents from a Harlem charter school that caters to special-needs kids are suing the city to keep it from closing.

The group, led by plaintiff Latya Downs, says the Education Department’s methods for evaluating success are unfair because they don’t account for the percentage of disabled students at a school.

More than half the students attending Opportunity Charter School have learning disabilities, speech impediments and other issues, the Manhattan Supreme Court suit says.

The parents say they love the school because it provides a safe environment for their special-needs kids and is specifically designed to give them extra support.

Their test scores have even gone up, just not enough to meet general standards, according to court papers.

The school, which opened in 2004, is set to close in June.

A city Law Department spokesman said, “We will review the complaint.”