Religion

Liturgical Readings
Daily Meditation
Meaning/Origin of Names

Science

Science Project Information
Astronomy links 
Weather links
Biology links
Periodic Table
National Institute of Standards and Technology

Magazines

Sports Illustrated for Kids
National Geographic

Math

Ask Dr. Math

Fun Stuff

How stuff works

References

Map Quest
Atlas
Ask Jeeves
Ask Jeeves for Kids
Bartleby (search the Great Books)