- Cyberkidz - Chato BV, touchscreensoftware.nl
A free website with more than 50 games about math, literacy and geography. In English and Dutch.
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- Cyberkidz.net - Chato BV
Online educational games for primary schools, widely used in the Netherlands and recently translated into English.
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- Cybermath - Gustav Taxén, Ambjörn Naeve, Olle Sundblad, Pär Bäckström and Sören Lenman
An avatar-based collaborative virtual exploratory environment for math. Trial version for Windows is available free.
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- Cybernetics and Systems Theory - F. Heylighen; Principia Cybernetica Web
General background material on the field of Cybernetics and Systems Science (also: (General) Systems Theory or Systems Research), an academic domain that touches virtually all traditional disciplines, from mathematics, technology, and biology to philosophy
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- Cyberpapy - Boulanger
Posez votres questions des devoirs dans les forums; des "cyberpapys" répondent.
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- Cyberspace and the Classroom - SageNet
A June 1998 article collecting individual teacher and parent views of the effects of technology in the classroom, the best ways to use technology, and some favorite sites to visit in pursuit of education.
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- CyberStat - Rick Thomas
An introductory statistics course for high school students who would like to get a background in basic statistical concepts and learn to apply them in a variety of curricular and vocational fields. The course will also prepare you to take the new AP Statistics
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- CyberStats - CyberGnostics, Inc.
A complete online introductory statistics course, including: a focus on data analysis and conceptual understanding rather than computation; over 600 interactive applets; real data in real-world settings; a built-in, simple, and free course management
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- The Cyclotomic Fields Virtual Study Group
A group of people studying L. Washington's book Introduction to cyclotomic fields. Download solutions to the book's problems in DVI format, or read the list of errata.
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- Cylinder Formulas (Ask Dr. Math FAQ) - Math Forum
Formulas for finding the surface area and volume of a general cylinder and a right circular cylinder.
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- Czech Statistical Office (Cesky statisticky úrad) - Czech Republic
Collects and distributes statistical data for the Czech Republic. Includes various statistics and maps on regional variation, release dates and ordering information for various publications, introduction to the department, and a FAQ about the value of
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- Dad's Worksheets - Dad
Dad's Worksheets is a site with strategies and free printable practice worksheets (including answer keys) for elementary math operations.
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- Daeron's Java - Daeron Meyer
Numerous applets, created by a former technician at the Geometry Center, can be enjoyed here if you have a Java enabled browser. Math-related creations include a 3D viewer; Real time function graph; Rotating Red Triangle; Circle Text; and links to other
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- Dagra: Digitize Graphical Data - Blue Leaf Software
Software to digitize data from graphs for use in numerical calculations, modeling and analysis. For Windows platforms. Free trial, and money-back guarantee, offered.
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- Daily Desmos - Anderson, Dan; Fenton, Michael; and Lanier, Justin
A daily challenge to reproduce a given graph using Desmos or some other graphing calculator. Teachers Anderson (NY), Fenton (CA), and Lanier (NY) rate the plots by difficulty. Also available from http://dailydesmos.blogspot.co.uk/.
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- Daily Squares - Steven Pomeroy
Arrange the digits in the 4×4 grid so that each column, row, and diagonal adds up to 34. Visit every day for a new magic square puzzle; check the archive for past challenges.
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- DA Information - David Hoffman
An introductory course in decision analysis, with lecture notes and instructions for projects.
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- The Dalton School - New York, NY
Founded in 1919, the Dalton School is committed to educating students in accordance with the Dalton Plan developed by Helen Parkhurst in the progressive spirit inspired by John Dewey during the early 20th century. Curriculum includes: First Program, Middle
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- The Dance of Chance Science Museum Exhibit - Center for Polymer Studies, Boston University
An online version of an exhibit focused on the emergence of patterns in Nature from physical and biological processes that appear to be chaotic. Exhibit kiosks, many of which are fractals, include Music of the Heart, Frozen Lightning, Erosion, Viscous
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- Dancing Chaos - Ivars Peterson (MathTrek)
Music, dance, and chaos... The image on the computer screen resembles a delicate, stylized butterfly with translucent wings held lazily askew. It's called the Lorenz attractor, named for meteorologist Edward N. Lorenz of MIT, who in 1963 discovered this
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- Dancing with Mathematics: Mathematics Related to Contra Dancing - Larry Copes
The mathematics of contra dancing. The essay has three sections -- What's contra dancing? What mathematics is in contra dancing? and More abstractly -- and links to figures illustrating contra dance symmetries and geometric transformations.
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- danicamckellar.com - Danica McKellar
From the author of the books for middle school girls, Math Doesn't Suck: How to Survive Middle School Math without Losing Your Mind or Breaking a Nail, Kiss My Math: Showing Pre-Algebra Who's Boss, and Girls Get Curves. Read about McKellar's voice-over
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- Daniel Bump
A mathematics professor researching automorphic forms, representation theory, and number theory at Stanford University. Read the errata for his book Automorphic Forms and Representations, notes on the Riemann zeta function and possible proofs of the
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- Daniel J. Velleman - Daniel J. Velleman, Department of Mathematics and Computer Science, Amherst College
In addition to Velleman's selected papers, link to his books, software, and unpublished papers, including Proof Designer, a Java applet designed to help students learn to write proofs in elementary set theory by outlining the steps of proofs under the
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- Daniel Lemire's homepage - Daniel Lemire
Daniel Lemire is a researcher in wavelet theory, data thinning and subdivision schemes. Recently, he has been interested in applications of these mathematical tools to e-business and data mining. Site contains papers (downloadable, PDF format), software
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- The Danish Mathematical Society
A society for the benefit of mathematics in research and education. Meetings, publications, and membership information. Site also available in Danish.
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- Dan Kennedy - Dan Kennedy, Baylor School
Essays by Kennedy, the first high school teacher ever to chair the Advanced Placement Calculus Development Committee, include his article "The Princess and the AP: A Calculus Fairy Tale" and his 1998 address to the National Council of Teachers of Mathematics,
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- d'Arbeloff Interactive Math Project - Massachusetts Institute of Technology
Java applets, with help documentation, for exploration: Amplitude and Phase, Beats, Complex Exponential, Complex Roots, Convolution (accumulation or flip and drag), Damped Vibration, Damping Ratio, Euler's Method, Forced Damped Vibration, Fourier Coefficients,
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- DareWare: Educational, Multimedia and Java Games
Educational games and multimedia products (free demo versions downloadable), Java games, "This Week in U.S. History", and a brief list of other shareware sites.
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- Dartmouth College Wavelet Warriors - Math and Computer Science Depts., Dartmouth College, Hanover, NH
People, research interests, projects, selected publications.
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- Data Analysis Project: Honors Functions, Trigonometry, and Statistics - Harley, Hasskamp, O'Neil, Kent School
Projects by students of Nils Ahbel at the Kent School in Connecticut. Using UCSMP's "Functions, Trigonometry and Statistics" textbook, students learned how to do a statistical analysis and communicate the results, finding information and data on the Internet.
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- The Data and Story Library (DASL)
"Dazzle," an online searchable library of datafiles and stories that illustrate the use of basic statistics methods, providing data from a wide variety of topics so that statistics teachers can find real-world examples that will be interesting to their
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- The Data Archive - University of Essex, ESRC, JISC, UK
A United Kingdom collection of social sciences and humanities data and statistics. Search for articles and data sets and order the appropriate item, or link to sources of information online. The Data Archive Bulletin may be downloaded in Word format.
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- Database of Existing Mechanized Reasoning Systems - Kohlhase, Talcott.
A 1999 page designed to represent the state of an ongoing effort to collect information about existing automated reasoning systems - automatic resolution provers (like Otter), interactive provers (like PVS) and other mechanized reasoning tools. The page
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- Database of Number Correlations - James Barton
Partitionings, prime factorizations, polygonal numbers, and other data about each of the numbers one through one thousand, as well as connections to "various material and occult phenomena." See also Barton's magic square that has interesting prime factor
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- A Database of Sample Statistics Quiz Questions - Brian Schott, Ed.; Business Statistics, Georgia State University
In the 1970s the National Science Foundation developed a 3003-page set of statistics quiz questions and answers. This site is a collection of 811 of those questions and answers, with links to the full database, arranged to complement the Introduction
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- Data Collection: Primary Poster (SMILE) - Amelia Witherspoon, New Concept School
A lesson for the primary grades designed to teach students to collect, graph and analyze data. From the Practical and Applied Math section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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- Data Description, Inc.
Makers of data analysis software and computer-based training packages. The data analysis software is designed for data visualization, data mining, and statistical analysis; the computer-based training packages are self-paced, multimedia training courses
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- Data Envelopment Analysis (DEA) Homepage - Ali Emrouznejad
A resource site for DEA, an operational research tool for measuring technical efficiency. Includes a brief introduction, glossary, models, bibliography, dissertations, books, people in the field, tutorial, course, data sets, software, discussions, links,
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- Data Formats - Paul Bourke
Documentation on geometric data interchange formats: Postscript, HPGL, Images, Audio, Medical, and Computer formats (binary files, ANSI Standard, ASCII codes, Latin 1 character set, mmencode, VT100 commands and control sequences).™
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- Data Games - KCP Technologies
As students play Data Games, they generate data that they must analyze to win the games. Supporting materials include a student worksheet; teacher guidelines that correlate the activity to the Common Core State Standards for Mathematics (CCSSM); and videos
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- Data Gathering and Analyzing - Carol Hurst's Children's Literature Site: K-2
A sample chapter from
Picturing Math by Carol Otis Hurst and Rebecca Otis (SRA/McGraw-Hill, 1996, ISBN 0-02-687367-2). "When we look up information to answer a question or to formulate new questions, we are gathering and analyzing data. When we conduct
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- The Data Library - Pat Daley
Ongoing data-sharing projects, downloadable Excel spreadsheets, and other sources of data on the Web. Collaborative Projects - specific data collection projects that teachers and their students may become a part of; Data Sets that can be downloaded as
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- Datamath Calculator Museum - Joerg Woerner
Historical calculators and educational toys, primarily from Texas Instruments. History of calculators, technical details, many interesting sidelights, including downloadable emulators.
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- Data Paint - Man Machine Interface, Inc.
Statistical utility software for for MS windows 95, 98, NT4.0, 2000, that uses GUI (Graphical User Interface) language to link charts, graphs and statistical information about selected groups of data. For each graph and statistics window, there is a corresponding
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- Datasets (Exploring Data) - Rex Boggs, Education Queensland
Datasets that support the activities, worksheets, assessment, and articles in the
Exploring Data website, each identified by topic and available in three formats: Excel 4.0, NCSS Jr. 6.0, and Tab Delimited. Datasets include: 1970, 1971 US Draft Lotteries;
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- DataStreme Atmosphere - American Meteorological Society
A major precollege teacher enhancement initiative of the American Meteorological Society (AMS). Its main goal is the training of K-12 Weather Education Resource Teachers who will promote the teaching of science, mathematics, and technology using weather
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- Datexx On Line
Personal electronics to purchase: basic calculators, clocks, computer accessories, desktop calculators, organizers, printing calculators, scientific calculators, toys and games.
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- DAU Math Refresher Tutorial - George Mason University
An interactive tutorial that uses a subway map as a metaphor for moving through the lessons, giving a comprehensive view of basic mathematics, covering arithmetic, fractions, exponents, logarithms, quadratic equations, series, functions, limits, domains
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- Dave Donoho - Statistics Dept., Stanford University
Recent lectures ("Beyond Wavelets: A Case Study"); links to software and software the author has written or co-written.
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