Mississippi River

http://www.mudisland.com/c-24-teacher-resources.aspx

http://www.thehomeschoolmagazine.com/MississippiRiver.pdf

http://www.homeschoolshare.com/little_toot_on_the_mississippi.php

http://www.edwinlyon.com/Videos.htm

http://www.americanrivers.org/

http://www.mbgnet.net/fresh/rivers/index.htm

Itasca, Minnesota Head water

http://images.dnr.state.mn.us/destinations/state_parks/virtual_tours/itasca/mississippi_headwaters.jpg

Louisiana

http://educators.btnep.org/client_files/editor_files/ACTIVITY%203-05%20Exploring%20the%20Barataria-Terrebonne%20Watershed.pdf

Ch 45 and 47 of This Country of Ours is about the Mississippi River:

http://librivox.org/this-country-of-ours-part-5-by-h-e-marshall/