Mathematics 

http://www.learningwave.com/lwonline/workingfront/numberfront.html

http://www.learningwave.com/abmath/

Mesopotamia

Mesopotamia Links:

Hammurabi's Code
http://www.phillipmartin.info/hammurabi/homepage.htm

Odyssey Online - graphics, info, games from the Michael C. Carlos Museum at Emory University
http://carlos.emory.edu/ODYSSEY/NEAREAST/homepg.html

Mesopotamia from Wikipedia
http://en.wikipedia.org/wiki/Mesopotamia

Exploring Ancient World Cultures - Near East from Indiana
http://eawc.evansville.edu/nepage.htm

Mesopotamia 
http://web.archive.org/web/20041105085726/http://www.lksd.org/kongiganak/kongiganak/ContinuousEdCarnagie/Carnagie/WorldHistory/WldHistoryCh2/WldHistoryCh2EarlyCivilizations.htm

Ancient Sumer from Vilanova College in Brisbane, AU
http://www.vnc.qld.edu.au/enviro/sumer/2001.htm

Mr. Dowling's Electronic Passport - Mesopotamia
http://www.mrdowling.com/603mesopotamia.html

The Fertile Crescent
http://www.mnsu.edu/emuseum/prehistory/middle_east/

History for Kids - The Sumerians, Babylonians, Assyrians, Hittites
http://www.historyforkids.org/learn/westasia/history/history.htm

The World History of Mesopotamia
http://web.archive.org/web/20041129085333/http://history.evansville.net/meso.html

Mesopotamia (Assyria, Babylonia, Sumer) from the British Museum
http://www.mesopotamia.co.uk/menu.html

Mesopotamia from Fordham
http://www.fordham.edu/halsall/ancient/asbook03.html

The Sumerians
http://www.fsmitha.com/h1/ch01.htm

Ancient Mesopotamia
http://www.historylink101.com/ancient_mesopotamia.htm

Mesopotamia from the University of Washington
http://www.wsu.edu:8080/~dee/MESO/MESO.HTM

Sumerians
http://www.crystalinks.com/sumer.html

Nancy Mautz's Mesopotamia page
http://web.archive.org/web/20041129085333/history.evansville.net/meso.html

Mesopotamian Art
http://www.dia.org/collections/ancient/mesopotamia/mesopotamia.html

Babylonian Math
http://www.angelfire.com/il2/babylonianmath/

Hanging Gardens of Babylon
http://www.cleveleys.co.uk/wonders/gardensofbabylon.htm