Twentieth Century Music (Classical)
http://www.carolinaclassical.com/twentieth.html

A Guide to the Twentieth Century
http://www.channel4.com/history/microsites/H/history/guide20/part09.html
http://www.channel4.com/history/microsites/H/history/guide20/part01.html

The 100 Most Important American Musical Works of the 20th Century
http://www.npr.org/programs/specials/vote/list100.html

Oldies Music
http://www.oldiesmusic.com/

Popular Music at MSN Encarta
http://www.oldiesmusic.com/

Popular Music Glossary
http://www.factmonster.com/ipka/A0776052.html

20th Century Music @ Wikipedia
http://en.wikipedia.org/wiki/20th_century_music

A History of 20th Century Music
http://www.scaruffi.com/history/preface.html

Modern Period
http://www.empire.k12.ca.us/capistrano/Mike/capmusic/modern/modern.htm

20th Century Pop Culture Class
http://teachers.sduhsd.k12.ca.us/cblack/20thcentury/outline.html

A Guide to the 20th Century
http://www.channel4.com/history/microsites/H/history/guide20/part09d.html

20th Century American Culture
http://hometown.aol.com/TeacherNet/20CC.html

20th Century America
http://www.teacheroz.com/20thcent.htm

History of the Twentieth Century
http://www.teacheroz.com/20thcent.htm

20th Century Fashion History
http://www.vintagevixen.com/fashionhistory.asp

The Costumer's Manifesto
http://www.costumes.org/history/100pages/costhistpage.htm

Timeline of the Twentieth Century
http://history1900s.about.com/library/weekly/aa110900a.htm

Internet Modern History Sourcebook: The 20th Centure: War, Conflict & Progress
http://www.fordham.edu/halsall/mod/modsbook4.html

20th Century @ Wikipedia
http://en.wikipedia.org/wiki/20th_century

20th-Century Art
http://witcombe.sbc.edu/ARTH20thcentury.html

Maine MARVEL (Check Encyclopedia Britannica)
http://libraries.maine.edu/mainedatabases/

Folk Music History
http://folkmusic.about.com/od/historyoffolk/a/Folk_History.htm

Costum & Textile: A Century of Fasion, 1900 - 2000
http://collectionsonline.lacma.org/mwebcgi/mweb.exe?request=browpage;dept=cost;method=centfash;permission=3

American Cultural History: The Twentieth Century
http://kclibrary.nhmccd.edu/decades.html

EASE History (Video Clips)
http://www.easehistory.org/index2.html

American Memory from the Library of Congress (photos etc.)
http://memory.loc.gov/ammem/index.html