Don't ask them. Look up the law and read it for yourself.
This is an excerpt from Tennessee code 39-17-1309 says:
(c) (1) It is an offense for any person to possess or carry, whether openly or concealed, any firearm, not used solely for instructional or school-sanctioned ceremonial purposes, in any public or private school building or bus, on any public or private school campus, grounds, recreation area, athletic field or any other property owned, used or operated by any board of education, school, college or university board of trustees, regents or directors for the administration of any public or private educational institution. It is not an offense under this subsection (c) for a nonstudent adult to possess a firearm, if the firearm is contained within a private vehicle operated by the adult and is not handled by the adult, or by any other person acting with the expressed or implied consent of the adult, while the vehicle is on school property.
Jim