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  1. In the Journal settings under "Grade Settings"  enter the points possibe for the Journal entries. 
  2. If you have a due date and time you can enter in that information under "Due Date"
  3. If you would like to grade with a rubric add the rubric in the "Associated Rubrics" area.

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Source: https://help.blackboard.com/Learn/Instructor/Ultra/Interact/Journals