The academy was founded in 1902 as
Castle Heights School outside of
Lebanon, Tennessee. Its founders were David Mitchell, president of
Cumberland University; Isaac W. P. Buchanan, a mathematics teacher at the recently defunct Cumberland Preparatory School; Amzi W. Hooker, a resident of Lebanon; and
Laban Lacy Rice, a former English instructor at the Cumberland Preparatory School. Rice served as the school's headmaster and was later president of Cumberland University. Buchanan taught mathematics at the school and was later its business manager and headmaster. The academy was initially coeducational and had 96 boarding students. In 1954, the school had grown to almost 500 students and operated a summer camp. In 1965, Ingram became the academy's superintendent, after serving as its commandant since 1929. Cumberland University maintains records and other school memorabilia. ==Campus==