Have a student lie on the ground outside. When a teacher appears, tell them the student jumped and point to the roof or third-story window. Toss handfuls of BB s on the floors of busy halls, assemblies, etc. Leave resignation letters from faculty members on the principal s desk. Get a small group to carry screwdrivers and slowly dismantle the school.
Bomb scares break up boredom during exams or on beautiful days.
Splice into your school s intercom system from a remote, hidden spot. Take the door to the office off its hinges but leave it standing there. At a pep rally, wear clothing in support of the opposing team. Pass copies of this list out. Put a ticking clock in a locked briefcase and leave it in the courtyard.