"The Mountain" by Steve Earle

"Youngstown" by Bruce Springsteen

"Paradise" by John Prine (especially this one)

"Miner's Refrain" by Gillian Welch

"Lydia" by Slaid Cleaves

"Miner's Prayer" by Dwight Yoakam

"Where Corn Don't Grow" by Waylon Jennings or Travis Tritt

Search for lyrics on Google or another search engine.

In addition to these songs, instrumental music from Appalachia would be good to use for mood/background music:
Appalachian Waltz Album

Heartland: An Appalachian Anthology

Appalachian Spring by Copeland

The movie Song Catcher would help students to visualize the lifestyle in Appalachia