Mystery story???????????????

make it a murder mystery, and have your teachers or people in the school slowly get taken down one by one until they find the person who's killing everybody. It will be more effective if you start it in a place where it's quiet and where nobody is around a lot. So start it out at the janitor found a dead body in his closet at 6:30 in the mourning, and use the time and student schedules to unravel the mystery.