At this step of the Tutorial, you must have a "Discussion Threads" Module in which you can create "Discussion Thread" documents, in which you can also create "Discussion Post" documents.
Go to Modules tab (as shown in the slide) and choose Discussion Threads.
After that, click on "Action..." then choose "Add Discussion Thread" (In that module you can see a list of Threads which have been created).
From a Discussion Thread document, click on "Action..." then choose "Add Discussion Post". You then land on a new post, to which you can give a title.
If you go back to the Discussion Thread document, you cannot see the list of Posts which have been created yet. We will now see how to associate a workflow to the Discussion Thread and Posts.