The sites listed below are a sampling of existing NASA and other related sites on the topic of the Moon.  NASA does not endorse the non-NASA sites; they are offered merely as examples.

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Basic Moon facts, from NASA:

http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html

 
Detalied information about the Moon, from All Science Fair Projects.com:

http://www.all-science-fair-projects.com/science_fair_projects_encyclopedia/Moon

Basic information about the Earth’s Moon, from KidsAstronomy.com.

http://www.kidsastronomy.com/earth/moons.htm

 
Tutorial on the phases of the Moon, from the National Institute of Environmental Health Sciences

http://www.niehs.nih.gov/kids/lunar/home.htm#moon

 
Glossary of definitions that have to do with the Moon and other objects in the sky.  Private site.

http://home.hiwaay.net/~krcool/Astro/moon/moonpedia/

 
History of the Apollo Program, from NASA

http://nssdc.gsfc.nasa.gov/planetary/lunar/apollo.html

 
Lunar data from the Clementine Spacecraft, from United States Geological Survey (USGS)
http://astrogeology.usgs.gov/Projects/Clementine/index.html

Map-a-Planet tool from USGS, allows you to make custom maps of the Moon
http://astrogeology.usgs.gov/Projects/Map-a-Planet/

Moon Viewer (very cool!) allows you to pick a place on the Earth (latitude and longitude) and a time ("now" is the default). It shows you what the Moon looks like from that place at that time, and also gives you phase information.  Private site.
http://www.fourmilab.to/cgi-bin/uncgi/Earth/action?opt=-m&img=MoonTopo.evif