This worksheet, called 'Earthquake Worksheet: Drop, Cover, and Hold', was kindly presented by the Federal Emergency Management Agency and NEHRP. It is a one-page classroom poster having a picture of a teacher and students hiding under their desks - reminding how to act to protect themselves when an earthquake strikes. The picture also shows how computers and objects in the bookcase are fastened securely: this was done to prevent them from falling onto the students.
It is a great reminder that can always be there when an emergency happens. A clear and concise way to display safety rules in class.