General Resources for Secondary Math

Links verified on 8/24/09

1. Ask Dr. Math: Questions and Answers - You can also submit your own questions.
2. A Common Book of π - a brief history of extended precision approximations of pi, including Archimedes' method for estimating pi, a page full of "oh, wow!" formulas used to estimate pi over the centuries, and a brief look at a modern algorithm used to compute pi
3. Exercises in Math Readiness - A very thorough site with all levels of higher mathematics. Site includes tutorials along with exercise practices for subjects that include algebra, trigonometry, geometry, logarithmic functions, complex numbers, truth tables and direct and indirect proofs.
4. High School Ace - math resources for Algebra, Geometry, Trigonometry, and Calculus
5. Interactive Mathematics - Use Flash, Scientific Notebook and LiveMath to explore mathematics and get a better understanding of what it all means. Play and learn! Check out the extensive math lessons. [categorized by concept]
6. Math Continuum - Numbers, Pattern/Relations, Shape/Space, Statistics/Probability - This site has an excellent glossary, be sure you take a look at it.
7. The Math Forum: Internet Resource Collection - this is a condensed table of contents of the resources available
8. Math League Help Topics - This is a help resource for 4th through 8th grades. You will find help tutorials for the following topics: Whole numbers and their basic properties; Decimals, whole numbers, and exponents; Using data and statistics; Fractions; Geometry; Ratio and proportion; Percent and probability; Integers; Metric units and measurement; Introduction to algebra; and Positive and negative numbers.
9. MathVids - a web site providing high quality, instructional, free math videos to middle school, high school, and college students who need math help
10. Mathematical Tables and Formulas - This is designed for students and educators to quickly access mathematical formulas. The tables are organized by topics
11. Mega Mathematics - Math activities posted by Los Alamos National Laboratory.
12. Middle & High School Math Topics - from the Awesome Library 
13. Multiplication: An Adventure in Number Sense - Multiplication tips; click on any underlined fact on the table to learn about a reason why you do not have to memorize it. Use the Next arrow to see what else you can discover.
14. Number Gossip - Enter a number and the site will tell you everything you wanted to know about it but were afraid to ask. [For example, I found out that unreasoned fear of the number 13 is termed triskaidekaphobia]
15. Number Theory - a list of links from Math Archives
16. On Line Math Applications - multi-link site
17. Pi through the Ages includes an interesting mnemonic for the decimal expansion of pi. Each successive digit is the number of letters in the corresponding word. With this mnemonic you can remember pi to 3.14159265358979323846264... If you are interested in a bit of whimsy, check out a couple of pi carols to sing on pi day, March 14.
18. Standard Measurements in Sports from InfoPlease
19. Tips & Tricks to use in solving K-12 Math Problems, Puzzles. Check out the tips on how to beat the calculator.
20. Webmath! - over 100 instant-answer, self-help, math solvers, ready to help you get your math problem solved