Here are some thoughts on this:
 
1. Web sites:  a while back, someone posted regarding the library of
congress web site for WPA oral histories.  I checked this out and it is an
excellent source of primary history.  The texts of the interviews are
on-line and searchable by key words.  Just be sure to explain the
limitations of the oral histories as they were recorded by the WPA.
 
Could someone post this address again?
 
2.  Texts-  For advanced students or teacher prep:
Webb, Walter Prescott  The Great Plains 1931
Hurt, Ray Douglass
        The Dust Bowl: an agricultural and social history 1981
Also Donald Worster, Matthew Bonnifield, James Malin's Winter Wheat, and
Hundley's Dark and Bloody Ground.
 
Not perfect, as many of these focus on ecology and technology, but they
will be interesting and you can cull some from the references.
 
Regards,
Tim Scarlett