Our school has installed a video camera at the main entrance with a buzzer. When a visitor wishes to enter the building they must buzz the office, identify who they are, and then the secretary will automatically unlock the door. Visitors who stay in the building must wear a nametag that is then returned to the office when they leave. All building doors are locked after the students have entered and the tardy bells sounded. Teachers who take the children outside for recess must check out a building key when leaving and return it when going back to class. There are over 600 students in the building and this safety system seems to be working.