Share 'Best blog site for a class blog?'

I know we've got a few bloggers here. I have a blog on blogspot (http://www.digimel.blogspot.com/) that I'm not all that fantastic at keeping updated - being very busy and all, but I have found it very easy to use. What I'd like to do is start a blog for my class. I've been meaning to for a while, but have been distracted with other things. Before I do though, I'd like to know what blog sites oth…