What term is used to describe those who are not present in a specific area during school events?

The term used to describe those who are not present in a specific area during school events is best captured by the phrase referring to "school personnel not present in the area." This accurately defines individuals affiliated with the school—such as teachers, administrative staff, and other personnel—who are not physically located in the designated area during a school event.

This distinction is important in the context of safety and security protocols during school functions, as knowing which individuals are not present can help in planning for emergencies, managing crowd control, and ensuring that all necessary staff members are accounted for. The other options focus on individuals who are present or provide specific roles but do not address the simplicity and clarity of identifying those absent from a defined location during school activities.