The Jedi Academy was something Luke Skywalker started on Yavin 4. Because Luke Skywalker likes to invent words, he called it the Praxeum, but everyone just calls it the Academy except for him. But the secret is, he started it in a Sith temple.
Not Surprisingly, Luke was quickly pwned by a 4000-year-old Sith Lord, and one of his students had a good time in three systems and a nebula. But eventually, the other Jedi pwned that Sith Lord, and Farmboy got his body back.