PBS
Pbs: American Roots Music
If teaching a unit about the history of popular music in America, this PBS web site supporting their four-part TV broadcast of a few years ago would make a great resource. Includes lesson plans and oral histories too.
National Endowment for the Humanities
Neh: Edsit Ement: Learning the Blues
This lesson plan introduces young scholars to the blues. The origin and development of the blues is explored as well as its distinctive structure.