Over the summer, edmodo has updated their Help Center. Visit the site here for a preview. You can search by topic and get step by step directions and illustrations. One of the new features I saw was the ability to moderate posts. (To find directions, visit the Help Center, enter “comment moderation” in the search field). If you select this option for your group, students will get a comment reminding them about teacher approval before the comment is live. As the teacher, an alert will post notifying you of a comment awaiting your approval.