The Educator's School Safety Network March 8, 2018 ESSN data in the NY daily news The Educator's School Safety Network March 8, 2018 The group found 638 threats were made after the Valentine’s Day massacre at Marjory Stoneman Douglas High School in Parkland, Fla.The threats prompted 33 school closings and 15 lockdowns, according to a USA Today review of the incidents.
