Could you pretend you are an actor, and the role you are currently playing is teacher"? I know this sounds weird, and it is a way of detaching your self from the work, there are times I use this "method" for work, and I tend to do a really good job because, in some sense I am being "watched" but not in a negative way. It is just myself, writer, editor, film maker...in my head. It doesn't take up much space. I "become" the nurse. And, after a while, it is me after all.