National Geographic for Kids http://www.nationalgeographic.com/kids/
The World Fact Book https://www.cia.gov/redirects/factbookredirect.html
The United States Interactive Map http://www.enchantedlearning.com/usa/states/pennsylvania/
United States Fast Facts http://www.infoplease.com/states.html
8th Grade Textbook Link http://www.classzone.com/
7th Grade Textbook Link http://www.glencoe.com
Son of Citation Machine http://citationmachine.net