The ever changing room. Noelle hadn't known this existed until she needed to start practicing and catching up on her spells. Of course, she didn't know the professor until she came back and since he was new, this was probably a new room.

Noelle ventured into the room. She wondered how it worked. She knew it changed but... How? She stood still for a few seconds, waiting for furniture to move or lights to go on or off. When nothing happened, she turned to leave and the door was locked. Squinting at it, she pulled on it. Nothing.

Maybe this is what the room did. Locked them in and you had to find a way out.