Jedi academies were established to train Force-sensitive beings accepted into the Jedi Order in the ways of the Force. The practices of each academy varied, but in general a group of Jedi Masters would instruct younglings, Padawans and the occasional older beings, and each had a Headmaster. Most of the Jedi academies were created before the centralization of the Jedi Order and thus were established on far-flung worlds, usually centered around those with ties to the Force, laden with unique crystals for lightsaber creation, or near a threat that needed a watchful eye.