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… the leading online resource for improving math learning, teaching, and communication since 1992.

**Teacher2Teacher**

**Math Tools**

**The Problems of the Week Program**

MathForum: MathForum

Maths.org: Mathematical terms and ideas

The ABACUS International Math Challenge was launched in 1997 by Tivadar Diveki, head of Grace Church School’s science department. The program is based on a printed journal for gifted students, originating in Hungary over 100 years ago.

Participants over the years included Edward Teller, Leo Szilard and other notables in physics, computer science and mathematics. Today’s Abacus is designed for students of all abilities and demonstrates that mathematical talent can be stimulated and developed through individual attention, instant feedback and challenging subject matter with flexible levels of difficulty.

The Internet has made this program available to students around the world. Every month, eight problems are posted for each of three age groups. Students are asked not only to solve the problems but also to present the reasoning in their solutions. If a student submits an incorrect solution or is simply having trouble with a problem, a teacher will offer hints as to how to go about solving the problem, giving students multiple chances to succeed.

Abacus: Abacus

KÖMAL: The journal KöMaL

In mathematics the Mandelbrot set, named after Benoît Mandelbrot, is a set of points in the complex plane, the boundary of which forms a fractal …

Wikipedia: Mandelbrot set

Skytopia: Mandelbrot set

A nice math teacher web page. It is designed for ages 13-100!

**Coolmath Prealgebra**

**Coolmath Algebra**

**Geometry Information and Art**

**Math Puzzles**

CoolMath: Cool Math

Cool Math 4 Kids: Cool Math 4 Kids

A nice flash animation produced by Robert Ahrens and Julia Schmalz on USA TODAY.

USAToday: International Space Station comes together

NASA: International Space Station

Wikipedia: International Space Station

Scienceclarified: International Space Station

USAToday: Space station to get final solar panels

Space: space.com

**History of NAVSTAR GPS**

The GPS System was created and realized by the American Department of Defense (DOD) and was originally based on and run with 24 satellites (21 satellites being required and 3 satellites as replacement).

**Galileo Navigation System**

EU strives for more stable navigation system similar to the U.S. GPS

**GPS**

The Global Positioning System (GPS) is a global navigation satellite system (GNSS) developed by the United States Department of Defense and managed by the United States Air Force 50th Space Wing.

Wikipedia: GPS

General information about our Sun: diameter, mass, temperature and other interesting data.

Wikipedia: Sun

Boston.com: The Sun

Michielb: The Virtual Sun

Windows to the Universe: The Sun

BBC Home: The Sun

NASA Goddard Space Flight Center: The Sun – Introduction

Stanford Solar Center: About the Sun

KidsAstronomy: The Sun

The National Maritime Museum: What is the Sun?

Science Nationalgeographic: Solar System

Kids Astronomy: Solar System

Nineplanets: Solar System

The Voyager program is a series of U.S. unmanned space missions that consists of a pair of unmanned scientific probes, Voyager 1 and Voyager 2.

Wikipedia: Voyager program

Professor Martyn Poliakoff answers a series of questions from students at a US middle school.

Daily Telegraph: YouTube periodic table: Explosive video guides

Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language …

Wikipedia: Philosophy

Wikipedia: Buddhism

Buddhanet: Buddhanet

Alexander Csoma de Körös, Founder of Tibetan Studies Alexander Csoma de Körös

Wikipedia: Atheism

infidels: Atheism

BBC Home: Atheism

The New York Times: Atheism

Skeptic Society and Skeptic Magazine

The Committee for Skeptical Inquiry

Skepticwiki

the Secular web

Freedom form Religion fundation

Naturalism

Center for Naturalism

Naturalism Philosophy Forum

Naturalism (philosophy)

Naturalism

MEMEING NATURALISM

the Secular web

The Committee for Skeptical Inquiry