Tips for using Nexis Uni:
Website: Most recent, but not always full article access.
ProQuest US Newsstream: Full Access two years back.
ProQuest Historical Newspapers: Full Access 1851-2013.
Website: Pew Research Center on Journalism & Media.
Website: Examples of real-life case studies. NOTE: You still have to write your own case study, but this can give you some ideas. Also useful for the SPJ Code of Ethics.