How could you be so insensitive about her sensitivity? Not everyone even likes guns, can handle loud noises, or want to be involved in something they see as only for killing - especially a teacher - I know, I left corporate to become a teacher in a very pro gun state and there were still many who abhorred guns.
Want her to like guns? Get great hearing protection, shoot only .22 and do it where some butthead isn't letting lose with some 500 magnum 2 feet from her. Then go from there......
Good luck in helping out