Blackboard automatically provides a class-wide blog for each course (you can make the class-wide blog available through the Course...
Blackboard automatically provides a class-wide blog available to all students (you can make the class-wide blog available through the Course Tools link in the Control Panel). In addition, you can create a blog space specific to particular assignments by adding a blog to any content area or group space.
Based on blog settings, you can assign a group blog, allowing a specific group to discuss group assignments. Individual blogs are also available and allow private dialog between a student and the instructor. In a private journal, student can see his or her own entries, along with any instructor comments while instructors can view journal entries of all students.
See the section on Blackboard blogs for more information.