Security in schools on Long Island varies, with some using just the district's own security staff and others use armed guards. Their security plans have to be updated and approved by the public and police.
The move comes after a 17-year-old girl smuggled a box cutter into the high school underneath a laptop in her backpack, eluding detection by scanning equipment.
A 17-year-old girl used a box-cutter during an argument with two fellow students, a 17-year-old girl and 18-year-old girl at Uniondale High School, police said.
The boy was stabbed by a 12-year-old student during an altercation early Monday afternoon, police said. School officials said Tuesday they believe it was "an isolated incident."