Collaborize Classroom is a free service that host websites for teachers. The fundamental purpose of Collaborize Classroom is to provide a discussion forum for teachers and students. On Collaborize Classroom teachers can post assignments, notes, and media for students. Students can reply to the teacher and to each other. To help teachers keep track of student use of their sites, Collaborize Classroom provides teachers participation and activity reports about each registered user of their sites.
Fro more infortaion, go to Collaborize Classroom