I've had a couple of people show interest but there is still room for more.
I've decided I would like a headmistress, a very domineering one into old-school punishments and general humiliation and such
While there might be periods when the teacher is not needed (such as during dorm time), at other times the teacher will be crucial and in the quiet moments she could take 1 student to her office for some personal tutoring, so the headmistress player need never be bored.
As usual, PMs if you are interested please. Thanks ^_^