Having a good safety plan of how your classroom is layed out and of all of it's safety features. I have a blank layout of my class room and students have to walk around the classroom and put all the safety attributes on the blank layout worksheet. It shows all of the fire extingishers, fire blankets, emergency exits, eyewash stations, power shutoff switches, first aid kits, safety data sheet workbook, fresh air exhaust and fans, hand washing station etc etc...