 Weather Underground  University of Michigan
One Sky, Many Voices: resources for collaborative study of current weather events for K12 classrooms, afterschool groups, and athome learning. Gather data on weather information on the Web, current conditions around the world, historical weather patterns,
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 WebCalc  Blaine Hilton
A collection of free, Webbased calculators that solve complete equations. Many of the calculators allow the user to solve for any of the variables. Subjects include algebra, geometry, trigonometry, fractions, complex numbers, and miscellaneous math;
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 WebCalC  The WebMath Group
An online calculus course with easy to read text, fully worked examples, problem solutions, quizzes, and online linking. To view WebCalC, you need the software Scientific Notebook (a free viewer version is available). The site includes links to publications
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 Web Calculators  TimeValue Software
Online calculators for solving common financial problems, designed with the financial professional in mind and covering a wide assortment of financial applications such as refinancing a mortgage, saving for retirement, or determining an investment yield.
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 Web Chi Square Calculator  Catherine N. Ball and Jeffrey ConnorLinton, Department of Linguistics, Georgetown University
Perform the chi square test for statistical significance. First, enter the number of rows and columns; then, enter your data. Also, take a tutorial or run demos.
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 The Web Classroom  Eagle Eye Web Masters
An educational site from Australia that provides lessons and tests to help students understand concepts in Mathematics and build language skills in English. Elementary and Middle School math pages offer Fun with Fractions, "What Number," Times Tables,
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 WebCrawler
Search the WebCrawler contentsindexed database by keyword  the contents of documents are indexed, not just their titles and URLs. You may include both general and specific queries. Or browse categories: Arts & Books; Autos; Careers; Computers &
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 WebEnabled Scientific Services & Applications (Online Calculators)  Patrick Wessa
Equation Plotter (Plot mathematical equations, statistical distributions,
numerical integration). Scientific Forecasting (BoxJenkins ARIMA modeling, forecasting, and bootstrap simulation of financial profit density functions). Descriptive Statistics
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 WebGrapher  Tom Cooper
This page contains a graphing applet that can be used online or downloaded.
The applet can create dynamic graphs with sliders that can be saved as web
pages. Users can plot points, functions, parametric functions, polygons,
vectors and more. There
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 Web Hunt  Mary Gasch; Nerinx Hall, Webster Groves, MO
A Webbased hunt centering on nonEuropean mathematics, with links provided to the mathematical contributions of a variety of cultures. Students may submit answers to their own teachers via an onsite form.
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 Web Interface for Statistics Education  Claremont Graduate University
Interactive statistics tutorials, answers to questions, and other resources for teaching introductory statistics. Tutorials, with exercises and Java applets, address sampling distributions of the mean; an introduction to statistical power; investigating
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 Web Links Concerning Statistics Teaching  William Knight
A link list including other collections of links, statistics glossaries, data sources, a particularly nice set of web textbooks and/or course notes, CHANCE, software distribution sites, and interactive (applets, etc.).
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 webMathematica  HostSRV.com
HostSRV.com hosts applications of webMathematica, a collection of tools that allow Mathematica commands to be placed inside HTML pages. A web hosting account includes storage space, bandwidth, FTP access for uploading scripts and files, and the use of
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 WebMath: Instant Solutions to Math Problems
Instant solutions to math problems: look over the various links on the home page until you find a topic that seems to describe the math problem you're working on. Select a link then another and you will be presented with a blank form into which you can
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 Web Maths  Serge Henry
Un site pour les mathématiques scolaires, utilizant le multimédia (Flash) pour apprendre et comprendre les maths. Aussi, un forum pour poser des questions; l'aide en ligne.
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 Web of Primes  Ryan Ingram
The first twenty billion prime numbers, indexed, searchable by ordinal position, and written out in English. See also Ingram's http://cpnumbers.com/, for the first one hundred million counting numbers factored.
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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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 The Web Page Dedicated to Pi  Paul Johns
Information on pi, 120,000 digits of pi, pi jokes and poems, a pi club, message board, facts and records, links to other pi sites, and more.
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 WebPisces  Gallery of Interactive Geometry, Geometry Center
A Webbased interface to the Pisces program that allows you to compute implicitly defined curves in the plane. Choose from several predefined functions and modify their parameters and domains. Pisces is a Platform for Implicit Surfaces and Curves and
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 WebStat  R. Webster West, Todd Ogden; Dept. of Statistics, Univ. of South Carolina
A statistical computing environment for the World Wide Web, written in the form of a Java applet. WebStat should run on any of the three major platforms (Mac, PC, Unix). It is currently equipped to do almost everything you need for an introductory statistics
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 WebTeacher  National Cable Television Association, Tech Corps
A selfpaced free internet tutorial designed for teachers and including both basic and indepth information about the World Wide Web. Email, Telnet, FTP, searching, web page design, image files, sound files, movie files, news groups, chat groups, teleconferencing,
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 Webtrig  Thomas E. Price
A Web tutorial on the fundamentals of trigonometry. The lessons in PDF format include an introduction to angles and their measurement, definitions of the trigonometric functions, graphs of trigonometric waves, an introduction to
trigonometric identities,
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 The Web Wizard's Math Challenge  J. Mooser
An ongoing Internet contest; register (free) to submit answers and score points. Problems are designed to be readily understood but not readily solved. Speed counts, because points are awarded based on the order in which contestants submit correct answers.
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 WeBWorK  Meliora Mathematica, University of Rochester
Delivering homework problems to students over the Internet. WeBWorK gives students instant feedback as to whether their answers are correct or not. Originally developed by Michael E. Gage, Professor of Mathematics, University of Rochester.
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 Web Worksheet Wizard  High Plains Regional Technology in Education Consortium (HPRTEC)
Create a lesson, worksheet or class page on the World Wide Web with this webbased utility. Also, locate existing worksheets by keywords, dates, grade levels, or subjects such as math. Hosted by Advanced Learning Technologies in Education Consortia at
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 weed's fractal gallery
A small gallery of fractal images and a few fractal links.
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 Weekend Projects—Picnic Geometry  Make Podcast
This video shows how to build an icosahedron out of paper plates, cups, or plastic sheeting—and pack some geometry into your next picnic! MAKE's accompanying post provides stepbystep instructions for assembling icosahedra from picnic supplies.
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 Weighing a Counterfeit Coin  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about using a balance beam to find a counterfeit coin, such as "If there are twelve coins in a bag, one of which is either lighter or heavier than the others, find the fake coin in exactly 3 weighings and determine
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 Weighing the Evidence  Keith Devlin (Devlin's Angle)
Hundreds of thousands of years of evolution have equipped us with many useful mental abilities  our instinct to avoid many dangerous situations and our use of language are two obvious examples. However, evolution has not equipped us to handle statistical
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 Weighted Averages  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about weighted averages, where some data have greater value than others, such as determining a final grade from three tests worth a total of 45% of the final grade, a final exam worth 25%, a project worth 15%, and three
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 Weights and Measures  National Institute of Standards and Technology (NIST)
A virtual museum exhibit examining the role of the United States government in the development and standardization of weights and measures, in eight sections: America before standard weights and measures; Ferdinand Rudolph Hassler; The Office of Weights
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 Weird Dice (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
In the dice game Piggy, you and your opponent take turns rolling a pair of ordinary dice. Your score is the sum of the face values of the dice, so if you roll a three and a four, you get seven points. The first player to reach 100 points wins. Suppose
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 Welcome to Steve's Blog  Steven Rasmussen
"Advocate for Change" Steve Rasmussen, the CEO and President of KCP Technologies, keeps this blog, which he describes as his "ideas, commentary, photos, and adventures relating to mathematics education." Topics include: Rejuvenating the Mathematics Education
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 Welcome to WebDice! (MSTE)  Nicholas Exner; University of Illinois at UrbanaChampaign (UIUC)
A Java applet that simulates the rolling of a set of dice. Use the pulldown menus to set the parameters for the trial.
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 West Contra Costa Unified School District Mathematics Center  Kennedy High School
Common Core mathematics resources, presentations, instructional videos, lessons, mathematics applets, parent guides, and other materials developed by the Richmond (California) school district.
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 The Western Reserve Reading Project  The Ohio State University
With over four hundred pairs of twins participating in annual data collection sessions over the past ten years, the Western Reserve Reading Project (WRRP) explores how the environment affects children's ability to learn "by evaluating how genes and environmental
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 Westerville South Math Raps  Schultz, Dave; and Winner, Tyler
"Mixing math with music, helping students learn": mathematical parodies of pop songs include Graph! (Yeah! by Usher); Solve Me Maybe (Call Me Maybe by Carly Rae Jepson); All I Do Is Solve (All I Do Is Win by DJ Khaled); Super Base (Super Bass by Nicki
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 The West Point Bridge Design Contest  United States Military Academy, West Point, New York
A challenge for U.S. students age 13 through grade 12. The purpose of the contest is to provide middle school and high school students with a realistic, engaging introduction to engineering. Learn about how engineers use the computer as a problemsolving
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 We Use Math  BYU Mathematics Department
From actuary to urban planner, read short descriptions of the scores of careers that use math  or log in to submit your own career entry. Each occupation's writeup includes its salary range, educational background, the specific math courses it requires,
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 WGCUTV: The Faculty Lounge  SW Florida Public TV, Ft. Meyers/Naples, FL
Tools to help use the Internet in the classroom. Annotated lists of links: topics include: Copyright and the WWW; Distance Learning; Financial Aid and Scholarships; FTP; Gopher; Grants; Job Hunting on the Internet; Magazines, Newspapers, and 'Zines OnLine;
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 What are Fractals?
A short description of fractals, with illustrations.
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 What Can Mathematics Do For The Businessperson?  Keith Devlin (Devlin's Angle)
In business, the ability to dig beneath the surface of a problem to see what
the real underlying issues are, and the capacity for clear and logical thought, can be extremely valuable. And learning mathematics provides an excellent way to develop that
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 What Color Is My Hat?  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about which person wears which hat, such as "Three students close their eyes, and the teacher puts a hat on each of their heads (hiding the other two hats)...."
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 What Does It Take to Be an Expert Problem Solver?  Annie and John Selden; Mathematical Association of America
Organized into five sections: ExpertNovice Studies Have Often Concentrated
on Textbook Problems; Solving Nonroutine Problems; Are Mathematicians Expert Problem Solvers? How Might One Teach Problem Solving? and The Importance of Affect. From the MAA's
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 What do we know about mathematics curricula?  Alan Schoenfeld, Journal of Mathematical Behavior
In the absence of either largescale empirical proof of success or the existence of compelling and documentable standards, there is reason to be cautious. The traditionalists are nervous for good reason. It should be noted, however, that the resistance
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 What, How, and the Web  Cut the Knot!, Alexander Bogomolny
More on place value. "There is an obvious confusion there between two questions, what to teach and how to teach it. Does the failure of the New Math to present a specific topic necessarily imply that teaching this topic has no merit? The New Math has
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 What is a Fractal?  Alan Beck; Glyphs
The word "fractal" was coined less than twenty years ago by Benoit Mandelbrot, whose work, The Fractal Geometry of Nature, first introduced and explained concepts underlying this new vision. Mandelbrot derived the term "fractal" from the Latin verb frangere,
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 What is a Fractal?  Sarah Seastone, Math Forum
A short description (with illustrations of the Mandelbrot Set) of fractals, paraphrased from Chapter 1, "A Mathematical and Historical Tour," of Robert Devaney's book, A First Course in Chaotic Dynamic Systems.
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 What is Chaos?  Matthew A. Trump; University of Texas at Austin
An interactive online physics course for everyone: a 5part nontechnical introduction to physics and chaotic motion in classical and quantum mechanics. Contents include: The Philosophy of Determinism (every cause has a unique effect, and vice versa);
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 whatis?com  Glossary of Internet Terms
An annotated glossary of Internet terminology, from abacus, aliasing, Altavista, and avator to zcoordinates and zipping. Also The Top Twenty (last week's most frequently consulted words); Books you like; phone numbers; and Every file format in the world,
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