Questions, questions, questions

I'm wondering if any of you out there know how to set up a class Wiki? I'm sure it's easy enough, but I figured I'd throw the question out there in case someone could it explain it. I once knew, and I wish I had all of my school notes organized and here in Arizona. I had my students in my publications class write Wiki articles, and now we need to publish them!

Also, for those of you who are teachers, what is your philosophy on taking a weekly break from the curriculum? I was thinking about starting to do just this after a short weekly quiz on Fridays. For example, Friday's would involve a 5-10 minute study activity, a quiz, and then, for the rest of class, activities different from, for example, Whale Rider, such as exploring SLAM poetry, read alouds of funny short stories/poems, SSR, and word games. Any thoughts?