US Flags,Symbols and Profile of US cities

State Flags:
http://www.infoplease.com/spot/stateflags1.html (Alabama – Louisiana)
http://www.infoplease.com/spot/stateflags2.html (Maine – Oklahoma)
http://www.infoplease.com/spot/stateflags3.html (Oregon – Wyoming)

State symbols:
http://www.infoplease.com/ipa/A0801717.html (songs, Tree, Bird and Flower)

Profiles of the 50 Largest Cities of the United States:
http://www.infoplease.com/ipa/A0108477.html

TIPS:
To brush up on these topics, explore the following websites:
http://www.nationalgeographic.com/geographybee/
http://worldatlas.com/aatlas/world.htm
https://www.cia.gov/library/publications/the-world-factbook/index.html
http://www.nps.gov/