School shootings and other mass killings have had a major political impact . Governments have discussed gun-control laws , to increase time for background checks . Also , bulletproof school supplies have been created , including backpacks , desks , bullet-resistant door panels , and classroom whiteboards ( or bulletin boards ) which reinforce walls or slide across doors to deflect bullets . Another organization that has proposed possible solutions to school shootings is the National Rifle Association ( NRA ) , to allow teachers to carry weapons on school grounds as a means of protecting themselves and others . So far , ten states have already introduced legislation to allow weapons on school property with eighteen states already allowing guns to be carried on school grounds , but not without constraints . Most states also require the gun carriers to receive advance permission from the districts ' superintendents or trustees . " In New York State , written permission from the school is required in order to carry a firearm on school grounds . " Due to the political impact , this has spurred some to press for more stringent gun control laws . In the United States , the National Rifle Association is opposed to such laws , and some groups have called for fewer gun control laws , citing cases of armed students ending shootings and halting further loss of life , and claiming that the prohibitions against carrying a gun in schools do not deter the gunmen . One such example is the Mercaz HaRav Massacre , where the attacker was stopped by a student , Yitzhak Dadon , who shot him with his personal firearm which he lawfully carried concealed . At a Virginia law school , there is a disputed claim that three students retrieved pistols from their cars and stopped the attacker without firing a shot . Also , at a Mississippi high school , the vice principal retrieved a firearm from his vehicle and then eventually stopped the attacker as he was driving away from the school . In other cases , such as shootings at Columbine and Red Lake High Schools , the presence of an armed police officer did little to nothing to prevent the killings
Virginia law school
Appalachian School of Law shooting
School shooting