Jen Coleman, a teacher in Alabama, explains why she keeps a sharpie in her emergency bag.

I’m thinking about one Sharpie pen in particular. It’s black, medium thickness. And it stays in the blue emergency bag that I keep on the filing cabinet closest to my classroom door. Our school’s emergency bags are remarkably sparse. No band-aids, no first aid materials. We have one flashlight, one sign with my name to help my students find our class if they get separated during a mass exodus, one copy of my class rosters, and one Sharpie marker. Why a marker? Someone asked that very question at a staff meeting. The nurse explained, in a completely emotionless tone, that the Sharpie was so we could identify students and write their names on their bodies in the event of an incident.