someone who doesn't just preach. someone who is able to really say something ba<x>sed on his or her experiences. someone who talks about things relevant to the topic. :)
A great teacher brings the subject alive in imagination and in spirit; a great teacher is excited about the subject matter he or she is teaching and that enthusiam is passed onto her/his students.
my guidance teacher was unbelievably beautiful and I would get in trouble just to get sent to her office.....she would always press her breasts against me when trying to explain what she was talking about..... I never did understand what she was trying to say ...but it felt good and she remains a great teacher in my mind