MATH WEBSITES:

Ask Dr. Math
Submit questions or look for answers to old questions
in  the archives.
URL: http://forum.swarthmore.edu/dr.math 

Frank Potter's Science Gems - 
Math & Science
Provides links to dozens of math & science web pages.    
URL: http://www.sciencegems.com/

YES Mag
Canada's Science Magazine for kids
It's full of nifty experiments and ideas.  
URL: http://www.yesmag.bc.ca/

SCIENCE WEBSITES:

American Field Guide
Over 1,400 video clips from a wide variety of nature
settings all over America.
URL: http://www.pbs.org/americanfieldguide/

Animal Information
Find information about animals from the animal resources link
at this Busch Gardens/SeaWorld site..
URL: http://www.seaworld.org/

BrainPOP
Explores health, science, and technology concepts through
short animated movies.
URL: http://www.brainpop.com

CalPhotos
34,000 images of plants, animals, people, and landscapes
from the Digital Library Project at the University of 
California at Berkeley.
URL: http://elib.cs.berkeley.edu/photos

Dragonfly
Interesting articles, games, and stories about science and nature
for younger students.
URL: http://miavx1.muohio.edu/~dragonfly/index.htmlx

Exploratorium
Produced by the Exploratorium museum in San Francisco, this
site includes a 'ten cool sites' list.
URL: http://www.exploratorium.edu/

Marshall Brain's How Stuff Works
Explains how a vast array of things work, from gadgets to
space travel.
http://www.howstuffworks.com/

Powers of 10
Explores exponential growth by viewing the world from
the inside of an atom to the edge of the universe.
URS: http://www.powersof10.com

Yahooligans: Science and Nature Directory
A guide to science sites on the web.
URL: http://www.yahooligans.com/Science_and_Oddities/