This is a search engine that applies an academic filter to the inquiry. It eliminates a lot of the extraneous site that are included in a google search. http://www.sweetsearch.com/
Journey to a New Land is a site that has information about the peopling of the Americas. This link will take you to the Middle School Level but you can access other levels from here http://www.sfu.museum/journey/an-en/secondaire1er-middle
Biography of America Who were the key players in American history? This chronology links events and people important to the development of the United States from explorers and native people to the present. www.learner.org/series/biographyofamerica/index.html