; and (B) whether the firearm was purchased from a licensed gun dealer or an unlicensed sale. (14) If the original purchaser was not the shooter, what was, if any, the original purchaser’s relationship to the shooter. (15) If the original purchaser was not the shooter and the firearm was obtained from the shooter’s home, the gun storage practices being used in the home, and whether the gun owner was charged with failing to properly secure his or her firearm. (16) Whether the school had armed teachers, as that term is defined in section 8553 of the Elementary and Secondary Education Act of 1965 ( 20 U.S.C. 7943 ), and if so, whether such armed teachers stopped the incident by shooting the shooter. (17) How long did the shooting last (the approximate elapsed time between the first and last shots fired). (18) What was the response time of law enforcement. (c) Historic statistics on school shootings To the extent practicable, the Secretary of Education shall direct the National Center on Education Statistics to collect the data required in subsection (b) for shootings that occurred prior to the date of the enactment of this Act, and publish such data as a revision to any annual report on indicators of school crime and safety issued by the National Center on Education Statistics prior to the date of the enactment of this Act. (d) Safety and prevention In collecting data on school shootings to be compiled in the annual report described in subsection (a), the National Center on Education Statistics shall collect, at a minimum, information on the existence or absence of the following safety and prevention measures at the time of the shooting at schools where a school shooting occurred in the previous year: (1) Structural physical security measures. (2) School structural features that are designed with best practices to avert and restrict violence while preserving open learning environments that positively influence student behavior. (3) A communication plan with local law enforcement. (4) A response plan that includes