Review: Sea Shanties are wonderful resources for integrating music, social studies and science. Many of the lyrics are not intended for children; adaptations may be called for in certain cases! Men working (usually hauling rigging) on sailing ships sang rollicking choruses to help organize their efforts and distract sailors from the physical hardship of their work.
Good collections can be found at http://www.shanty.rendance.org and http://www.contemplator.com/sea/index.html.