Make sure the fire has a way to travel from one burnable area to another. Of course you should wear dark clothes and know exactly where you are going when you split. Get hold of a film to be shown at a school assembly and splice in parts of another movie of your own choosing before the assembly. A little imagination on your part will make for an unforgettable day. Clog up the drains of sinks with clay then turn on the water after everyone leaves school.
Teachers often leave gradebooks, conduct sheets, and attendance records unguarded.
Take every chance to help yourself. Put up posters all around the school. To make them stick permanently use Pet evaporated milk for glue. Start wailing in the halls. Tie your thread onto something and pass the spools around till you run out, winding thread around everything.