LINCOLN -- If an Imperial senator has his way, Nebraska teachers could be coming to school with graded papers, tomorrow's assignments and a handgun. Mark Christensen is preparing a new version of a bill which failed in 2011 in response to recent school shootings. Senator Christensen's new proposal would first require teachers to hold a concealed-carry permit. Then they would have to take additional training, possibly with a simulator. After that, the local school board would have to approve them to carry the weapon. Education and law-enforcement groups have opposed teacher-totting gun bills. The president of the Nebraska State Education Association says her group has a zero-tolerance policy for deadly weapons on school property.