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21st Century Problem Solving

A+ Math
This site is great fun for elementary and middle school students.

The Abacus: The Art of Calculating with Beads
Three sets of activities teach students to count, add, and subtract using an interactive abacus. Each section includes a virtual representation of an abacus that can be manipulated on the screen. There is information on the use of the abacus in different cultures.

Abstract Algebra Online
Great site for advanced high school or college students.

Algebra Problems Online

Amusing Mathematics Web Page

Appetizers and Lessons for Math and Reason
Suggestions and problems for math as well as reflections on teaching for all disciplines. Includes logic puzzles, algebra-building skills, and a guide to studying math.

Ask Dr. Math
Answers to any K-12 question via e-mail.

Brain Teasers
Divided between grades 3-4, 5-6, and 7-and-above, these brainteasers can be used for lesson openers or to integrate math into other parts of the curriculum. One teaser presented each week, though archived teasers are available.

Busy Teachers Math
From the Busy Teachers web site comes links to other math lessons and ideas from around the web. Categories: Fractals, Games and Toys, General, History, Lesson Plans/Classroom Activities. 

Dave's Math Tables
One expects just tables, but gets more - lots of formulas, identities, tables, series, etc., all with nice diagrams. For example, surface areas for geometric figures, trig identities. A great reference for college math students.

ENC Online
Mind your P's and Q's and ABCs at ENC Online. This site, which is sponsored by the U.S. Department of Education, features a variety of curriculum materials for K-12 math and science students. In addition to lesson plans, suggested activities, publications, and hyperlinks to other math and science resources, ENC highlights 13 new outstanding math and science Internet sites each month. You also can read the electronic editions of ENC's many print publications, including a newsletter, curriculum catalogs, and reform information.

Fun with Numbers
A good resource in its own way, this site features many things that you would not want to figure out on your own, including: the first 28,915 odd primes, the first 999 factorials, and 1.2 million digits of pi.

Furman University Mathematical Quotation Server
Another unique math site, this one does one thing: provides a comprehensive compilation of math-related quotes. Organized by the author or the quote. Handy if you need the perfect quote.

The Geometry Junkyard
Even math haters love this site.

Good News Bears
This web-based interactive stock market game helps students select and track a stock and understand the effects on its value of certain variables, including political climate, foreign relations, and general economic indicators, as well as company management and profitability.

Graphics for the Calculus Classroom
At this site you will find downloadable graphics and animations related to calculus problems. The animations and graphics are usually accompanied by interesting problems for presentation to students, such as finding the volume of water in a tipped glass.

The Guide to Math and Science Reform Home Page
This searchable database includes more than 1,000 projects and organizations dedicated to improving K-12 math and science education. Its purpose is to share information and allow interested individuals to discover and contact others who share their goals.

How Far Is It?
You won't believe this site! Enter two places, just about anywhere on the earth, and this site computes the distance.

Karl's Calculus Tutor
Worth a visit if you are a first-year calculus student.

Mactutor History of Mathematics Archive
This site contains biographies of thousands of important figures in math history, many with photos. Be sure to check out the History Topics

Math Forum
Formerly known as the Geometry Forum, you'll find this updated and expanded web site provides valuable mathematical information for you and your students. The Student Center offers aids for the confused, while the Teacher's Place contains classroom plans and activities.

Math Magic Project
A K-12 telecom project that posts challenges in four grade-level categories. Registered teams work together to solve problems. Addresses the standards of the National Council of Teachers of Mathematics.

Mathematics Archives K-12 Teaching Materials

Mathematics Lessons Database

Mathmania
This site explains many unsolved mathematical dilemmas that modern mathematicians are working on. An Introduction for Teachers gives the rationale for the project. Support materials include curriculum connections, classroom activities, and a simple description of each problem.

Mega Math
This site has information on mapping, graphing theory, knot theory, algorithms, computer science, and infinity. Under each topic there are activities, vocabulary sections, a background section, overview of major concepts, prep and materials sections, and an evaluation section to help you tie math to everyday life for your students.

MusiNum - The Music in the Numbers
This site explores the use of integers to create musical notes. By following patterns such as counting by twos and threes, the notes are combined to create beautiful and sometimes surprising melodies.

NCREL Web Site
Locate useful information, planning tools, and lesson plans, plus find links to many top-notch math sites across the Internet. This site provides one-stop shopping for busy educators.

Oklahoma State University Mathematics Education Center
Teaching tips, lessons and tutorials, jobs in mathematics, a bulletin board, and other links to help teach the most abstract art.

PBS Mathline
This site provides materials that teachers can adapt and implement into their curricula. The Math Concepts section changes monthly. Other categories include Teaching Tips, Math Challenges, Career Connections, Resources, and Assessment.

SCORE Math
This is the California Department of Education's sponsored site for math resources. Teachers have created lesson plans and found Internet resources for math teaching, divided by grade levels. Lesson plans are available here, plus links to related Internet resources.

Topics in Mathematics
This site is a repository for math links on the web. Thousands of links in well-defined categories.

World Wide Web Virtual Library: Mathematics
A great place for math wizards and neophytes. Contains links to online resources for math teachers and students.

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Updated 03/20/2007