1) Verify the student is in a group. Any groups a student has been assigned to are displayed in the list of course users.
2) If you are using the Q & A forum type, you must create the discussion for each
group separately. When you add a question to the Q & A forum, check the "Post a copy to all groups" checkbox located below the attachment field. If you don't check this box when you create the question, you'll either have to manually copy/paste your question text into a new question for each group, or create a new forum. Detailed instructions are available in the Faculty Guides>Forums> Setting Up Forums. Scroll to the Using the A & A forum section.