Erie Canal: http://www.history.com/news/history-lists/8-ways-the-erie-canal-changed-america
Louisiana Purchase: http://www.history.com/topics/manifest-destiny/videos/louisiana-purchase-doubles-size-of-america
Transcontinental Railroad: http://www.history.com/topics/westward-expansion
The Alamo: http://www.history.com/topics/alamo/videos/the-alamo
The Pony Express: http://www.history.com/news/history-lists/10-things-you-may-not-know-about-the-pony-express
The Oklahoma Land Rush: http://www.history.com/news/the-oklahoma-land-rush-125-years-ago
The Trail of Tears: http://www.pbs.org/video/2365748419/ https://www.brainpop.com/socialstudies/ushistory/trailoftears/
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Lewis and Clark: http://www.pbs.org/video/2365496920/
Oregon Trail: http://www.history.com/news/history-lists/9-things-you-may-not-know-about-the-oregon-trail
Native American Culture: Buffalo http://www.history.com/topics/native-american-history/native-american-cultures/videos/american-buffalo
Mexican American War http://www.pbs.org/video/2365071301/ https://www.brainpop.com/socialstudies/ushistory/mexicanamericanwar/
Westward Expansion: https://www.brainpop.com/socialstudies/ushistory/westwardexpansion/