Explorers:
http://www.enchantedlearning.com/explorers/1500a.shtml
https://www.landofthebrave.info/american-history-of-early-explorers.htm
http://mrnussbaum.com/explorers/famous-explorers//
http://mrnussbaum.com/explorersflash/
http://www.history.com/topics/exploration/exploration-of-north-america
http://bowenpeters.weebly.com/uploads/8/1/1/9/8119969/exploration.pdf