Really cool educational sites...

How Big?
http://www.howbigreally.com/
Freedom Riders:
http://www.pbs.org/wgbh/americanexperience/freedomriders/
Time Explorer:
http://www.britishmuseum.org/explore/young_explorers/play/time_explorer.aspx
Top Secret America:
http://projects.washingtonpost.com/top-secret-america/
Smart History:
http://smarthistory.org/
Online Maps:
http://geology.com/world/
American Radio Works:
http://americanradioworks.publicradio.org/
Good:
http://awesome.good.is/ecosystem/index.html#/home
Quotes:
http://www.bartleby.com/