FILES-US-POLITICS-TEACHERS-EDUCATION-FIREARMS(FILES) In this file photo taken on June 26, 2018 a trainee fires her gun during a three-day firearms course offered to school teachers and administrators by FASTER Colorado at Flatrock Training Center in Commerce City, Colorado. - Florida’s House of Representatives on May 1, 2019 approved a bill allowing teachers to carry firearms -- a controversial step whose effectiveness in countering school shootings remains unproven. (Photo by Jason Connolly / AFP)JASON CONNOLLY/AFP/Getty Images