Platonic Realms Interactive Mathematics Encyclopedia
http://www.mathacademy.com/platonic_realms/Platohom.html
--Great resource for historical connections
Italy in a Flash Currency Converter
http://www.italyflash.com/italyflash/shortt/money/converter.shtml
--Good for student projects
Violence in the Cosmos -- The Evolution of the Universe
http://csep10.phys.utk.edu/guidry/violence/violence-root.html
--Good for student projects
Texas Instruments -- Volume Purchase Plan
http://www.ti.com/calc/docs/vpp.htm
--Be sure to take advantage of the free hardware offered by TI
Dr. David Ballew's Home Page -- Western Illinois University
http://trainer.wiu.edu/ballew/index.htm
--The best example of a useful educator's home page that I've seen
Distance Between World Cities -- Also US Highway Distances
http://www.infohiway.com/way/javascript/mlgair.htm
--Good for student projects
Project Links -- Rensselaer Polytechnic Institute
http://www.infohiway.com/way/javascript/mlgair.htm
--Fabulous classroom demonstrations for trig, calculus, and discrete math
Quotations -- A resource for other quotation sites
http://www.informatron.com/quotes.htm
--Can help liven classroom discussions or help you get that quote right
The Math Forum -- Swarthmore College
http://forum.swarthmore.edu/
--Interesting discussions about current issues in mathematics education
Mathematical Challenges of the 21st Century -- American Mathematical Society
http://www.ams.org/amsmtgs/mathchall.html
--More discussion on current issues
Organizations
http://www.amatyc.org/
http://www.nctm.org/
http://www.nsta.org/
http://www.maa.org/
http://www.siam.org/nnindex.htm
http://www.ams.org/
http://www.wou.edu/LiberalArtsScience/NaturalScienceAndMath/Math/TOTOM.html