A school principal is the most senior teacher, leader and manager of a school. In early public education, the full title was "principal teacher," which accounts for the present day title having an adjectival form, a foreshortened version of the original full title. School principals in the United States are expected to have school administrator licensure, and, often, a master's degree in education administration.
- "Online Schools Offering Education Administration Degrees". Retrieved 12 July 2013.
- Kate Rousmaniere, The Principal's Office: A Social History of the American School Principal (State University of New York Press; 2013) 197 pages