The best way to keep in contact with a large group of people that you are writing with (like your whole class) is to sign up as individuals first. Then, once everyone has signed up, add each other as buddies in order to keep in touch. Your buddies will appear in a list of links on your author profile so you can easily look at your students' author profiles and they can look at friends'/classmates' author profiles and see their excerpts and progress.
Another good way to keep in touch and discuss your writing is by creating a thread in the appropriate grade level forum topic. Only educators and librarians can do this, sorry proactive young writers!
