This takes a little while, especially if the date range is wide.
This checks page views for each assigned article. It can take quite a while and you might not ever see the results, if there are a lot of articles or the date range is wide.
This returns articles edited from the beginning of the start month to the beginning of the end month, so it doesn't include articles edited only during the end month.
This lists *all* articles touched by students in the course(s), not just assigned articles. It returns articles edited only through the *start* of the end month.