A Klingon training academy was located on the planet Ogat.
In 2370, K'mtar, a gin'tak to the House of Mogh, suggested to Worf that he might consider sending his son Alexander Rozhenko to this school, where the instructors would make him into a Klingon warrior and prepare him for the Age of Ascension. As Worf's brother Kurn was an influential man, K'mtar believed he would assure Alexander's admission into this academy. This suggestion was rejected by both Worf and Alexander. (TNG: "Firstborn")