- Spatialised Prisoner's Dilemma: Evolution Simulator - Wayne Davis
Spatialised version of the Iterated Prisoner's Dilemma game theory that allows the users to set their own strategies and simulate evolution of strategies: Coded in Javascript by Wayne Davis.
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- Statpics.com - Robert W. Jernigan
This blog, "devoted to images that illustrate statistical ideas," has included posts such as "Quincunx: A Designer's View," "A Skewed Runway," "Joint and Marginal Distributions in Legos," "Microbes Illustrate Simpson's Paradox," "How Mariano Rivera Dominates
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- Strange Attractors - Peter Jansen
Physical models of strange attractors, made through rapid prototyping processes.
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- Strings on Your Fingers - Michael P. Garofalo, Red Bluff, California
Links to a host of Web sites, including Web and print bibliographies, with suggestions for where to learn more about string figures and Internet links.
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- Sudoku - PedagoNet
Sudoku online. New puzzles generated regularly; archive of past puzzles.
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- Sudoku Squares and Chromatic Polynomials [PDF file] - Agnes M. Herzberg and M. Ram Murty
"Have you ever been trying to solve a Sudoku puzzle and been gripped by a sinking feeling that maybe you were stuck with a lemon? That maybe the puzzle you are struggling with actually has no solution at all? And, if you do find a solution, how can you
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- Sudoku Widget - Brian DeBoer
Macintosh OS X users familiar with Dashboard use its mini-applications to perform common tasks and get fast access to information. The Sudoku Widget by Brian DeBoer generates random puzzles with four different levels of difficulty, has the option to show
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- Take a Little Piece of PI with You Wherever You Go - Adam Zampino
Proudly display PI to 1000 decimal places in an attractive design, in various types of apparel and housewares (mugs, clocks, etc.). PI has fascinated people for centuries, and now you can have your own piece of PI to enjoy. This makes a great gift for
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- The Tau Manifesto - Michael Hartl
"This manifesto is dedicated to one of the most important numbers in mathematics, perhaps the most important: the circle constant relating the circumference of a circle to its linear dimension... The traditional choice of circle constant is π -- but,
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- TeachPi.org
This "one-stop Pi Day shop for teachers and number lovers" offers stories, biographies, book recommendations, and other topical resources to celebrate March 14th. Brief descriptions of some of the activities come with extensions and short anecdotes from
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- Team America Rocketry Challenge - the Aerospace Industries Association (AIA) and the National Association of Rocketry (NAR)
Want to design, build, and fly model rockets? The first of these rocket contests was advertised as a one-off celebration of the 2002 Centennial of Flight; but the enthusiasm about the event was so great that its sponsors, the AIA and the NAR, were asked
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- Technology Student Association
A student organization devoted exclusively to the needs of middle and high schoolers interested in technology. Chapters of the Technology Student Association (TSA) take the study of science, technology, engineering, mathematics (STEM) "beyond the classroom"
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- TerryStickels.com - Terry Stickels
Puzzle website by author and syndicated columnist Terry Stickels. Visual puzzles, slideshows, and an online store for books, games, and other materials.
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- Tessellation Database - Patrick Snels
Find tessellations by subject, author/artist or by plane geometry. A virtual tessellation museum is planned.
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- Tessellations.org - David Annal
Overview of the subject of tessellations with practical examples of how to produce them. Background information on tessellations, including symmetry and famous tessellators, and extensive galleries.
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- Tess - Pedagoguery Software
A shareware program for creating symmetric planar illustrations. With Tess, while you draw you can automatically maintain the symmetry group you have chosen; 11 rosette, all 7 frieze, and all 17 wallpaper groups are included. Illustrations may be printed
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- Theoretical and Numerical Approach to "Magic Angle" of Stone Skipping - Shin-ichiro Nagahiro and Yoshinori Hayakawa, Department of Physics, Tohoku University, Japan
As published in the American Physical Society's Physical Review Letters: Nagahiro and Hayakawa "... investigate the condition for the bounce of circular disks which obliquely impacts on the fluid surface. An experiment [C. Clanet, F. Hersen, and L. Bocquet,
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- ThinkFun - ThinkFun, Inc.
The makers of Spin Out and Rush Hour seek to "push [you] farther, probe deeper and think more creatively through game play." Brainteaser games include Math Dice, which challenges you to use addition, subtraction, multiplication, division, and exponents
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- thnik again! - Jan Nordgreen
"Silly mathematical dialogues aimed to confuse." Nordgreen's daily blog of brain teasers and quotes dates back to November, 2007.
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- TierneyLab Puzzles - John Tierney
Challenging word problems that "put ideas in science to the test," from The New York Times' science columnist. Solve and comment on the puzzles and their extra credit extensions. See also Tierney's blog entries on mathematics.
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- Tiesforteachers
A company in the UK selling neckties specifically with the school curriculum in mind. The growing collection includes ties for teachers of maths, science, English, music, ICT and other general-purpose school subjects.
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- Trachtenberg Speed System - Math Forum, Ask Dr. Math FAQ
An introduction to Trachtenberg's system of performing high-speed multiplication, division, addition, subtraction, and square root, all in one's head, with references.
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- The Treb Challenge - GlobalSpec, Inc.
Custom build a trebuchet for three challenges: distance, accuracy, and power. Between launches, continue modifying the catapult-like seige engine's projectile weight, launch angle, gravity, wind, counterweight mass and height. After each challenge, the
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- Vi Hart - Vi Hart
Blog, videos of math "doodling," instructions for slicing food mathematically, and more from the self-described recreational mathemusician who considers math a hobby, with "special interests in symmetry, polyhedra, and surreal complexity. This usually
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- Vosenigmes.com - Kalimuse, LLC
In French: Vosenigmes.com permet de faire travailler ses cellules grises tout en s'amusant. Les petits comme les grands pourront se détendre tout en travaillant les mathématiques. Vosenigmes.com garde vos scores en mémoire, vous permettant de répérer
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- Web of Stories
Watch life stories of "people who have influenced and changed our world," such as Nobel laureates and eminent scientists -- or record your own stories. Video biographies available through the Web of Stories' flagship channel "Lives" include mathematician
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- what's your favourite number? - Alex Bellos
Enter your favorite number and the reasons for your choice. Part of a research project concerning how humans relate to numbers, this international survey is being conducted by Alex Bellos, author of Alex's Adventures in Numberland and Here's Looking At
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- Writings for a General Audience - Marcus Jaiclin
PDF articles on popular and recreational mathematics by Jaiclin, an Assistant Professor at Westfield State University: Notes on Mathematics of Voting Methods; Fractals, Pascal's Triangle, and the p-adic Numbers; Airplane Passenger Seating Problem; No
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- Your Online Exchange to Additional Math Solutions - a-maths.com
Tutoring, lessons, and tips for learning math; fun math topics; a marketplace for selling your used textbooks; and bulletin boards for discussion. Designed for students preparing for the GCE 'O' Level Additional Mathematics examination, based on the newly
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