I would like to use a book sharing site such as Shelfari, GoodReads or LibraryThing for teachers and students to share books, reviews and suggestions in support of a culture of reading at our school. This is for grades 9-12, and all students do have email. What site do you use? What site do you recommend, as far as features, ability to make groups and profiles private, showing book covers as well as lists, etc? What are some other options out there? Thanks!