Jon, Bravo to your wife for compiling a true curriculum on traditional work songs. I was never so disappointed in my life as when our public school's general music teacher announced he was going to teach us about sea chanties; the entirety of the lesson was us listening to a recording of Blow The Man Down (accompanied by instruments) and then of Shanendoah (done in a really hoky style with lots of instruments). I applaud any educator who's willing to do it up right!