We’ve had both students and faculty have problems with this. I’ve put this on the “MaryJane47” blog for students and here’s one for faculty.
Students (and faculty) have had problem with the course menu disappearing. Without the menu, there’s no navigation. ;-(
Point your students here: http://maryjane47.wordpress.com/2012/09/11/cant-find-your-course-content-in-blackboard/ — send it out to their email and/or put it in an announcement.
Watch this, it’s the best 1 minute and 42 seconds you’ll spend at this point!
(If the video doesn’t show, try this link: http://www.viddler.com/v/a0194d8)