Sites for Constitution day:

http://www.archives.gov/national-archives-experience/charters/constitution.html

http://www.constitutioncenter.org/

Fifth Grade Constellation/Planets Websites

Fact Monster

http://www.factmonster.com

World Almanac for Kids

http://www.worldalmanacforkids.com

Kidspace @ Internet Public Library

http://ipl.si.umich.edu/div/kidspace/