How do I create a discussion board?
Open the Discussions area in your course.  To create a new form, click the Create Forum button.

Give the forum a name.  This is the name that will show up as the link student click on to enter the discussion.  Description should explain to the students what they should be discussing in this particular forum.  

There are several other options to set after this part is filled out.

The Forum now exists in the Discussions area.  You can add more discussion forums in the same manner.