School safety officials said a video recorded by students at the school on March 10 shows a gang initiation, with a crowd of students pummeling each other on campus.
Cops responded to the school after two girls struck another girl in the face, according to police records for that day.
The victim didn’t report any injuries, but a shaky cell phone video that safety agents provided to the Daily News shows a melee with a mob of students punching each other.
The safety agents union president, Greg Floyd, said scared students gave the video to agents at the school in a cry for help.
“The de Blasio school violence coverup isn’t working,” Floyd said. “Students are afraid of the gangs, guns, knives. They came to us because no one at City Hall is listening.”