If you want the students to be able to view their own grades the following procedures should be followed.
You will need to log on to Blackboard, enter your course and click on Control Panel in the lower left of the screen.
Click on the Grade Center under Evaluation.
Scroll the horizontal scrollbar to the item that you would like to set the visibility.
Click the down arrow next to the item name.
Click on Edit Column Information link..
Scroll down to the Options section and reset Show this Column to Students option by clicking Yes or No.
Then click Submit button.