 Vygotsky  Cristina Guerra
A brief description of Vygotsky's theories about thought, language, and intellectual development.
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 Vygotsky's Distinction Between Lower and Higher Mental Functions and Recent Studies on Infant Cognitive Development  Eugene Subbotsky; Psychology Department, University of Lancaster, UK
One of the major theoretical advances of Vygotsky's approach to cognitive development was his thesis that human mental functions are social in origin. In making this claim, Vygotsky was confronted with the difficulty of reconciling it with the fact that
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 Vygotsky  Trish Nicholl
This paper includes sections entitled Higher and lower mental functions; Intramental vs intermental abilities; The zone of proximal development (ZPD); Psychological tools; and Semiotic potential and the decontextualisation of mediational means. With references.
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 Walking Randomly  Michael Croucher
Croucher's blog, which dates back to August of 2007, has included posts such as "Logo Programming on the pocket PC," "Christmas gifts for math geeks (like me!)," "Martial Mathematics," "R Compared to MATLAB (or 'learning a thing or two from your students'),"
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 WallaceBolyaiGerwien Theorem  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
According to the WallaceBolyaiGerwien theorem, all simple polygons of equal area are equidecomposable by dissection. The site offers a proof of the theorem and several dynamic illustrations of equidecomposition in special cases.
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 Wallpaper Groups (Plane Symmetry Groups)  David Joyce; Dept. of Mathematics & Computer Science, Clark University
Mathematicians classify plane patterns such as wallpaper patterns by means of symmetry groups  groups of transformations of the plane that leave the pattern invariant. A transformation slides, rotates, and reflects the plane into another position. Such
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 Wallpaper Groups: The Discontinuous Groups of Rotation and Translation in the Plane  Xah Lee
An undergraduate tutorial on wallpaper groups, with illustrations of the 17 wallpapers groups and a wallpaper gallery. Technically, the derivation of all discontinuous groups of rotation and translation in the plane. Contents include: Some Theorems on
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 Walpha Wiki  Derek Bruff and others
As collaborative site to record how secondary and undergraduate math educators use WolframAlpha, or Walpha as it's called here, in the classroom. In particular, the authors are interested in how students might use Walpha themselves, as well as how teachers
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 Wanted: A New Mix  Keith Devlin (Devlin's Angle)
An essay on the insularity of mathematicians. "...mathematics as a whole should be prepared to embrace as a useful and bona fide part of the enterprise, collaborative investigations involving mathematicians together with experts in other disciplines."
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 Waring Experiments  Ivars Peterson (MathLand)
You might suspect that, at some point, four squares would no longer be enough to express a given whole number. This reasonable supposition was overturned in seventeenth century, when Pierre de Fermat proved that every positive whole number can be expressed
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 WatchKnowLearn  Community Foundation of Northwest Mississippi
Thousands of free online math educational videos, categorized into topics such as mathematics for young learners, number operations, math in the real world, precalculus, math study skills and test prep, and history of math.
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 Waterman Polyhedra and Maps  Steve Waterman
World maps based on close packing of spheres that resemble B.J.S. Cahill's octahedral butterfly world map, but with only five degree graticule. With links to the mathematics behind the cartography, polyhedra applications, and other original findings.
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 Water Puzzle  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
There are three glasses  3, 5, and 8 oz. The first two are empty, the last contains 8 oz of water. By pouring water from one glass to another make at least one of them contain exactly 4 oz of water. Investigation into this puzzle by experimentation,
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 WAVELAB 802 for Matlab5.x  Donoho, Duncan, Huo, Levi
WaveLab is a collection of Matlab functions that have been used by the authors and collaborators to implement a variety of computational algorithms related to wavelet analysis. A partial list of the techniques available includes orthogonal wavelet transforms,
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 Wavelet Cascade Applet  Wim Sweldens
Cascading (or subdivision) is one of the standard methods to build wavelets and scaling functions. With this Applet you can graph all scaling functions and wavelets with two parameters, even and odd, which satisfy refinement relations with four coefficients.
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 Wavelet Digest: wavelet.org  Wim Sweldens
A free monthly newsletter with all kinds of information concerning wavelets; announcement of conferences, preprints, software, questions, etc. The latest issue and searchable copies of back issues (beginning in 1992) are available; links to other wavelet
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 Wavelet NetCare  Ben Nicholson; Dept. of Mathematics, Washington Univ., St. Louis
Wavelet links.
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 Wavelet Resources  Mathematics Dept., Yale University
Preprints and software for wavelets available from the Yale Mathematics Department.
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 Wavelets and Multiscale Methods in Numerical Analysis and Simulation  TMR Network, Silvia Bertoluzza
Links to Reports, Participants, Training Activities, Research Activity, Open Post Doctoral Positions, Paris Team Homepage  Access to the Software DATABASE, and the TMR Network News Server.
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 Wavelets  Salzburg, Austria
An extensive list of links to Internet sources of information for wavelets, and some bibliographies.
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 A Wavelet Tour of Signal Processing by Stéphane Mallat  F. Chaplais
A set of short presentations, inspired by S. G. Mallat's book, on frequency analysis; Dyadic wavelets and discrete filtering; regularity analysis; and frames.
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 The Wavelet Tutorial  Robi Polikar
The engineer's ultimate guide to wavelet analysis: a tutorial that explains basics of signal processing with a focus on the technique of wavelet transformations (WT). Basic concepts of importance in understanding wavelet theory; Short Term Fourier Transform
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 Webbased Are You Ready quiz/reviews  Brian Hassard; Dept. of Mathematics, SUNY Buffalo
Programs for students about to start first and second year courses in Mathematics. Students can test themselves to see whether they are ready for intermediate algebra, college algebra, business calculus, calculus I, II, or III, or ordinary differential
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 WebCab XL  WebCab Components
Range of math and finance techniques implemented within a free Excel addin for Windows. Techniques include: interpolation, probability and statistics, optimization, portfolio theory, options and futures pricing theory. Menu driven application development,
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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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 A Web Companion for Differential Equations, Mechanics, and Computation  Richard S. Palais and Robert A. Palais
This site is a free accompaniment to the book, and includes: applets, animations, images, links to textbooks and to other ODErelated sites, extracts covering more than a quarter of the book, and more. It is intended to become a web destination for anyone
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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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 Webgnosis.net  Matemáticas PAU  Webgnosis S.L.
Webgnosis Matemáticas Pruebas de Acceso a la Universidad contiene 1,500 ejercicios (álgebra, geometría, análisis), con el mayor énfasis en el diseño de situaciones de aprendizaje eminentemente prácticas.
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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 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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 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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 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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 Web Tutor  Chris Caldwell; Dept. of Mathematics & Computer Science, Univ. of Tennessee at Martin
A 1995 cgi program (written in PERL) that turns a directory of files into pages of a tutorial with an automatically generated table of contents, a registration process and buttons for navigation through the tutorial. Example math tutorials on graph theory
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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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 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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 Weight Puzzles  Erich's Puzzle Palace; Erich Friedman
Sixteen puzzles involving weights on fulcra. Can you figure out how much each weight weighs? Answers provided.
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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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 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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 What Affects Women's Decisions to Pursue Graduate Degrees in Mathematics?  Kathleen L. Bonn
A presentation summary given at the AMS/MAA Joint Mathematics Meetings, January 1013, 1996, in Orlando, Florida.
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