For version 7.83:
 

  1. Login to FAWeb as a teacher and view the gradebook.
  2. On the top of the window, there is a dropdown menu labeled Show, that originally defaults to This week's assignments. You can change this setting to control what assignments are visible, including showing all assignments.

For version 7.82 and older:

  1. Login to FAWeb as a teacher and view the gradebook
  2. Click the customize button
  3. In the assignments to include section, mark the option for All