There is a pro-gun Bill coming up in the Montana Legislature, probably this Friday that may set national precedent. If passed it will allow students to keep firearms in their locked vehicles or trunks, while the vehicle is parked on school property and remains locked. This Bill may bring a challenge from the federal "Gun-Free Schools Act".
Here is the Bill : http://data.opi.mt.gov/bills/2011/billpdf/HB0558.pdf