Here are some wise words on leading writing workshops by Marion Winik of the University of Baltimore. I saw this piece because of my writer friend, Jessica Anya Blau (via Twitter).
I am a writing teacher, too, and I've lived through some traumatic workshops back in Iowa (traumatic in a good way), and this is a classic essay about the experience. I love how Winik shows how helpful and scary leading a workshop can be...and in light of the "too-much-coddling" we often see in schools, I think the workshop experience is useful and enlightening, if sometimes difficult.
For more on teaching writing, see the film "Wonder Boys"--this is also a novel by Michael Chabon, but I think the film does more to illustrate teaching writing, even though I do love the book.