The grade reporting options for Blackboard CourseSites seem to be very limited.  The options include creating reports based on selected users/hidden users and finally,  you can select what user information to include in reports like First Name, Last Name, Username, Student ID, and Last Access.  There are not many levels available based on this view.  However, with this information online instructors can see how students are performing academically in the class as well as identify students who are inactive and might need a phone call.

There are course reports which give information on course activity (user activity with in the course) which would be valuable for the online instructor to see how much time the student is really spending on the material for insights into achievement.