Games
http://www.lc.pitt.edu/Education/games.htm
https://maps.google.com/maps/ms?ie=UTF8&t=h&oe=UTF8&msa=0&msid=202977755949863934429.00049f8ff9a29bab34a82
https://maps.google.com/maps/ms?ie=UTF8&om=0&t=p&oe=UTF8&msa=0&msid=117648869403781657124.0004446567eff1c15682f
Journals on a map
http://www.loc.gov/teachers/classroommaterials/presentationsandactivities/presentations/lewisandclark/