American Mathematical Society
Professional mathematical research and scholarship organization
Earliest Uses of Various Mathematical Symbols
Names of first to use common mathematical symbols and the dates the symbols first appeared
Famous Problems in the History of Mathematics
Includes proof of the Pythagorean Theorem and the value of Pi
Geometry Tutorials, Lessons and Tips
Help with geometry from About.com
Homemade Clinometer
Instructions for making this device used for measuring altitude, elevation, and vertical angles
InterAct Tutorials
Tutorials, study aids, and web links for further research
Math.com
Homework Help in math, including tools, formulas, tables, test preparation, and study tips
Math Forum
Ask Dr. Math (college level archive) from Drexel University
MathEmatics Help Central
College geometry help
MathWorld
Extensive math resources including algebra, calculus, geometry, probability and statistics, as well as math history and terminology
Nrich
Math Problems, Games and Articles from the University of Cambridge
Purplemath
Practical algebra lessons with hints, tips, and examples, including common mistakes
SOS Mathematics
Free resource for math review material on algebra, trigonometry, calculus, and differential questions
Schoolyard Clinometer
Make a clinometer using this guide from the New Jersey Coalition for Schoolyard Habitats
Success in Math
Tips from Saint Louis University
Webmath
View solved math problems or post a question for a math expert
