History Channel http://www.history.com/topics/westward-expansion
Mr. Nussbaum http://mrnussbaum.com/history-2-2/westward-expansion-for-kids/
Ducksters (scroll down) http://www.ducksters.com/history/westward_expansion/
Teaching with Dear America http://www.scholastic.com/teachdearamerica/westward.htm
Videos
Liberty's Kids (Earlier Expansion West ) https://www.youtube.com/watch?v=4rZ-Y4E-uyc
Crash Course (Made for older grades, but good overview) https://www.youtube.com/watch?v=Q16OZkgSXfM
