Algebra

4Tests.com (http://www.4tests.com/)
Online practice test site for SAT, GED, and Windows 2000 Professional includes math tests. Free, but you must register to use.

Algebrahelp.com is an assortment of lessons, calculators, and worksheets designed to help students and teachers.- (http://www.algebrahelp.com/)

Common Errors In Undergraduate Mathematics - (http://math.vanderbilt.edu/~schectex/commerrs/)

Cornell Theory Center: Mathematics (http://www.tc.cornell.edu/Services/Education/Gateways/Math_and_Science/mathematics.htm) Large directory of math links on the web by subject.

Dan’s Math @ Home Lessons is a site dedicated to understanding all levels of mathematics from Arithmetic through Calculus- (http://home.earthlink.net/~djbach/lessons.html)

Glossary of Mathematical Mistakes (http://www.mathmistakes.com/) Essays on math mistakes made by the media, advertisers, and “non-math people.”

Innumeracy.com (http://www.innumeracy.com/)
Links to articles about numeracy and critical thinking.(Not associated with author John Allen Paulos.)

Math Forum Home Page (http://mathforum.org/)
Math resources from Drexel University. Includes links to other math sites, and a question and answer format of problems and formulas in the Ask Dr. Math section (http://mathforum.org/dr.math/ ).

Math Nerds provides free, discovery-based, mathematical guidance – (http://www.mathnerds.com/mathnerds/)

Mathworld: Eric Weisstein’s World of Mathematics (http://mathworld.wolfram.com/)
Interactive mathematics encyclopedia arranged by subject.

Paul’s Online Math Tutorials and Notes – (http://tutorial.math.lamar.edu/)

Professor Freedman’s Math Help (http://www.mathpower.com ) Includes ways to reduce math anxiety and study skills tips for math.

Statistics Every Writer Should Know (http://nilesonline.com/stats/) Basic lessons on mean, median, percents, standard deviation, and data analysis.

Spreadsheet Page (http://j-walk.com/ss/)
Includes tips for using Excel. 1-2-3, and Quattro Pro.

Statistics

A Guide to Statistics put out by StatSoft – (http://www.statsoftinc.com/textbook/stathome.html)

An Introduction to Statistics from the Goddard Institute for Space Studies – (http://icp.giss.nasa.gov/education/statistics/)

Another “Introduction to Statistics” from Andrews University – (http://www.andrews.edu/~calkins/math/webtexts/stattoc.htm)

A Wikibook about Statistics – (http://en.wikibooks.org/wiki/Statistics)