BillOfRights                          

Citizenship                                

OwlCation

Library of Congress            

WorldAtlas                                   

History

WhiteHouse                           

EarthCam                                    

GeoSpy

Almanac4Kids                 

SocialStudies4Kids                  

State History 

CivilWar                            

NationalArchives          

DiscoveryEducation

DigitalHistory                          

WWII                                

EyeWitness

GoogleEarth                         

Smithsonian                               

50 States

UndergroundRailroad          

GeoGuesser                                        

BBC 

Britannica