Blackboard receives information from Banner about all current classes, instructors, and students. This information is updated hourly within Blackboard. Banner contains the official record of all of the courses you are registered for in a current semester. You may be registered for more classes than what is indicated in Blackboard.
If you do not see your class listed in Blackboard, your instructor may not be using Blackboard. Ask your instructor if s/he is using Blackboard for your class. If your instructor is, ask if the course has been made available for students to view it.