Thank you for the suggestion, but I think you got the wrong place. I'm already done with the actual academy and I went to the cave outside the acadamy. In there I entered a place called 'The Secret Chamber'. I have cleared the place and I'm in the last room (or so I think) where in the middle you find Sith Lord Ludo's stuff. In that room there are three doors that just say 'locked' and I just can't figure out a way to open them..
So still asking, has anyone got the doors open that I'm talking about?