See the ITS FAQ page for this.
For a graphical tutorial, start at my.bgsu.edu by authenticating, then come to your main page, something like this:
Click the tab for My Web Courses
Notice that Curric Anal Clasrm Behavr (Math 591) says [Unavailable], which means that your students cannot access the content you post there. Let's take care of this first. After clicking on the link for Math 591, I get:
Click on Control Panel in the lower left hand corner:
Under Course Options, click on Course Settings:
Now click Course Availability:
Click the Yes radio button, then Submit.