I am  mathematics teacher and a Librarian. Some of the sites I have found of interest are:

Geometry of War essay:

virtually seeing geoetry

Math Web (math sites)

Internet Geometry Projects:http://forum.swarthmore.edu/geometry/geom.projects.html

Covis interactive cooperative projects over the net

lesson plans on geometry

fibonnaccci numbers in plants, leafs, flowers stems:http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html

These are some of the the math sites that I have found interesting. There are a lot more sites that need to be explored. There are library sites I need to check out. But I see this as an on-going project.