The news comes amid a wave of copycat threats and foiled plots around the country.
Just in the last week or so, the FBI's New York office has fielded about 40 violent threats to schools, compared to a mere handful during a typical week.
"Threats about causing violence in schools are most concerning," said Billy Sweeney, the assistant director-in-charge of the FBI's New York field office.
Sweeney declined to specify the nature of each threat but said they ran the gamut. Each threat is initially considered legitimate until it thoroughly investigated. The outcome of those investigations was not clear.
"The spike in reporting is perfectly fine with me," Sweeney said. "We are appreciative of that."
The FBI conceded it failed to follow proper protocol chasing down tips about Parkland suspect Nikolas Cruz, but officials hope the mistake won't deter future public engagement.
"My hope is we don't have to convince the public it's the right thing to do," Sweeney said.