Parents are protesting a Department of Education proposal to move a charter school into their Manhattan special education building.
The plan would give Success Academy three classrooms at P.S. 811 in Harlem.
The school serves autistic and developmentally disabled students from Harlem and Washington Heights.
Protesters say the move negatively impacts the community's most vulnerable kids.
"What's going on here is basically an encroachment on the public schools, on the community schools by a charter school and by the Department of Education basically forcing out public school students, and not just any public school students, but the most vulnerable," said Noah Gotbaum of the Community Education Council.
Department of Education officials said that two new buildings will open in the fall to accommodate special needs students.