The one thing I'd emphasize -- workshopping student work is an important part of the course. You're expected to do it, and the students sort of expect it. But once you give it to them, they don't know what to do. Because critiquing the work of others isn't something that comes naturally. It has to be learned, and it's not always easy to learn. So -- you'll find you own way to teach this, but it has to be taught.
One way is to offer discussion questions. I can't really do this -- it's not natural to me. But it's one way.
Another -- and this works better for me -- is to set up forums on Blackboard. Divide the class into smaller discussion groups -- say, for to six in each group. Everyone in the group is to post his or her assignment, and everyone is to critique the work of the other members of the group. Then you start a dialogue, critiquing their critiques, suggesting things they might have thought of, encouraging perceptive critiques. Most of the first ones will be awful. I loved this -- it reminded me of my own grandmother. This had a really good flow to it. That sort of thing. As I said, they won't know what to say -- they won't have any sort of critical vocabulary. You encourage them to do the same things you encourage them to do in writing about literature -- go to the text, focus on specifics. What more could the author do to make this the poem it wants to be?
Don't do in-class workshopping right away. Start giving them that vocabulary first, and the encouragement that it's all right to be critical, and how to constructively bring out the things that are good about the piece -- not all criticism has to be negative.
Do some workshopping in small groups, and some in the whole class. But this will be one of the most important skills you'll teach them all semester.
You MUST read the article I just read today in the New Yorker -- Groupthink, by Jonah Lehrer. It's absolutely fascinating about the ways people make progress in groups, and the ways that they don't.