Curriculum Resources/Philosophical Links
http://www.wmich.edu/cpmp/ - A link to the Core-Plus website. Great information on the curriculum for both students and parents.
http://www.mathematicallysane.com - A site which explains and justifies the reform math movement. Lots of good info.
Online Graphing Calculators
(All of these come with a natural "learning curve" which you'll have to overcome. They all have their own unique interface and you'll just have to play with them for a while to get used to them.)
http://math.exeter.edu/rparris/winplot.html- FREE! An awesome graphing calculator program. Download it (Click on the link that says "Winplot") and be able to do everything the graphing calulator can do and more! You should have this even if you have a graphing calculator. Once you get it, if you need help figuring out how to use it, come see me.
http://people.hofstra.edu/staff/steven_r_costenoble/Graf/Graf.html
http://www.coolmath.com/graphit/
http://rentcalculators.org/stheli.html
https://www.desmos.com/calculator
http://www.mathsisfun.com/data/function-grapher.php
http://wabbit.codeplex.com/ - A TI emulator. You have to go find the skin.
General Mathematical Reference Sites/Homework Help
http://web20guru.wikispaces.com/Tools+By+Subject
http://www.wolframalpha.com/ - Maybe the coolest website ever.
https://mathway.com/ - Sweet
http://mathworld.wolfram.com/ - Pretty much everything you ever wanted to know about math but were afraid to ask...
http://www.math.com/ - Contains homework help in Algebra and Geometry as well as others, FAQ on math, math games, online calculator and many other features.
http://www.algebra.com/ - Algebra and Geometry homework help.
http://www.algebrahelp.com/index.jsp - Algebra help, lessons worksheets games and more.
http://highschoolace.com/ace/ace.cfm - Homework Help - Subject Guides - Reference Tools - College Prep Resources.
http://mathforum.org/dr.math/ - A huge resource for help on common math problems.
http://www.google.com/webhp?safe=vss - Hey, if you can't find what you need from the above links, try googling it!
Data Resources
CIA "World Factbook" - Find out just about anything you need to know about any country in the world
http://www.nationmaster.com/index.php - LOTS of stats!
http://www.ers.usda.gov/Data/Macroeconomics/Data/HistoricalPopulationValues.xls - Good population data.
Random (sometimes fun, always interesting) Math Sites
http://www.cut-the-knot.org/pythagoras/index.shtml - Proofs of the Pythagorean Theorem.
http://www.ies.co.jp/math/java/geo/pythagoras.html - Some great animations helping to explain and prove the Pythagorean Thoerem.
http://www.softlab.ece.ntua.gr/miscellaneous/mandel/mandel.html - The Mandelbrot Set (what the heck is that!?)
http://www.onlineconversion.com/ - Wanna know how many feet are in a kilometer? How many grams are in a pound? How many inches are in a light year? How many yottameters are in a twip? (No, I am not making that one up) How many g-units are in a hectometer per square second? (Not making that one up, either)
http://www.mathsnet.net/geometry/ - Cool animation of geometric nets of 3-D shapes.
World Population - Gives a running total of the current population of the planet. It will also tell you the population for any date you give it.
Probability Simulations - Quick way to simulate coin flips, spinning spinners, etc...
The Planet Walk - Read the directions, then go outside and try it. You might be amazed.
The Scale of the Universe - Whoa.
MATH WORDS
http://www.mathwords.com/- Look up all those crazy math words, also has formulas and notable names.
Hey! If you are out there exploring and find a cool math-related site, email it to me and I'll check it out.