We allow students to discuss books online using the discussion section of the wiki. Our school requires summer reading for students, and the rising 6th and 7th grade students had the option of participating in an online book discussion to earn a "banked" grade in Language Arts. Students earned this grade based on their level of participation.
http://6thgradetms.wikispaces.com/message/list/home
http://7thgradetms.wikispaces.com/message/list/home