Some were located on or near Force wellsprings or places significant to the Order like crystal caves or nexuses of dark-side energies that needed constant monitoring.
Many academies had been established during the Old Sith Wars and were located in the Galactic Rim. The size of the school varied from world to world: some as small as a single clan of younglings, others as large as the main academy housed within the Jedi Temple of Coruscant.
However, at all sanctioned academies, a group of Jedi Masters would instruct Initiates to the Order in the ways of the Force.
Mainstreaming the majority of teachings at the Temple, certain practices were permitted to vary from world to world. Overseen by the Council of First Knowledge, each academy was governed by an advisory Council appointed by their superiors on Coruscant.