If your course has Discussion Groups, there are two ways to find your groups.
If you are in a group, you should see a
Or click on your Group number, a
There may also be a link on the sidebar, excluding the one above, to access the group discussions. If so, clicking on it will bring you to a new Group page.
Clicking on the Group number will bring you to the Group Main Page. Here, you can see who is in your group, email your group, and access the Group Discussion Board. It should look similar to the image below: