In California, Delphi Academy of Los Angeles was opened in 1980; Delphi Academy of Sacramento was operated from 1980–2004; and Delphi Academy of Santa Monica operated from 2007–2014.[6]
Delphi's publishing arm operates under the assumed business name of Heron Books,[10] whose offices are located on the Delphian School campus.[7] It was incorporated in 1973 as the Delphi Foundation and changed to the present name in 1987.[10] Delphi Schools says that its schools teach using "The Delphi Program". The Study Technology teaching method is licensed through Applied Scholastics. Several Delphi schools use the Heron Basics Program of Heron Books for instruction.