Firing a Teacher

The biggest thing that I was told is to do it in a loving way. And if at all possible, try and find another spot for them in ministry. Obviously, if a teacher is not teaching correct and sound doctrine, that is a great and needed time for release.
As mentioned earlier, the most important thing to do is to go about it in a loving and compassionate way. No one, especially someone who is being relieved of their duties, likes a jerk telling them that they're done! We need to go about it in a way that they know 'why' it is happening. The way we do this is by just telling them, "Listen, here's why..." We may even come to that 'meeting of release' with a set list of reasons explaining why and how you came to the conclusion.
If at all possible, try and find another place of ministry for them. Whether that is letting them sit in on another, more experienced teacher and let them watch how it's 'supposed to be done'! Sit a major reason for releasing them from their duties may be a result from poor theology, get them in a situation where they can fully enagage and learn to re-vamp their personal theology in a timely and correct manner.