The class stream page is where you can see all the content you have created for your students to have access to. This includes tests, surveys, assignments, and even live sessions. If the order in which things appear is not to your liking you can edit the page and make the changes.
To edit the page enable to edit option. When you first enable it everything that is editable will flash yellow. When it is enabled it will appear green. Once it is enabled you will be able to move the sections and order them as you desire. Also, you will be able to edit the names of lessons and the sections that fall underneath them
Once you have made the desired changes just disable the edit mode.