 CV Complex Variables (Front for the Mathematics ArXiv)  Univ. of California, Davis
Complex Variable preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 CYBERCHASE Online  Educational Broadcasting Corporation (PBS.org)
Companion site to CYBERCHASE, PBS's animated math adventure series, intended to foster math literacy and problemsolving skills for kids ages 811. Play interactive games or practice with tools such as the talking calculator, crack challenging puzzles,
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 CyberExam (S.O.S. Mathematics)  Dept. of Mathematical Sciences, Univ. of Texas at El Paso
A place for students and educators to check out sample tests, midterm exams, final exams, quizzes, projects, etc... in Mathematics. To submit an exam, please fax or email your material to S.O.S. MATHematics. (If you are a student,
please ask your instructor
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 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 avatarbased 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 realworld settings; a builtin, 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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 CyMath
Stepbystep typeset results in differential calculus, integral calculus, algebra, and trigonometry. Just key in your expression or equation — or modify one of CyMath's examples — then select from among eight actions in the pulldown menu:
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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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 Dadaviz  León Markovitz and Jishai Evers
Interactive data visualization curated from thirdparty sources. Infographics, which date back to April, 2014, have included "GDP per Continent & Country," "The major causes of death in the 20th Century," "4_21 Polytope Visualized," "The Changing Arctic,"
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 DadsWorksheets
Thousands of math worksheets: addition, subtraction, multiplication, and division, including in bullseye and grid formats; fact family math and facts in spiral layout; long division; negative numbers; exponents; order of operations; fractions, graphic
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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. Mathrelated 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 moneyback 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 Dose of Teaching Awesome  John Mahlstedt
Blog by a math teacher in the Bay Area who also coaches track and basketball at his middle school. Posts on his "journey to find and document at least ONE good thing everyday of the school year" date back to January, 2014: "Desmos Brings the Noise," "Central
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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. For more "cool math tricks, math games, and interesting mathematical concepts,"
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 Daina Taimina
Hyperbolic crochet, talks, publications, and other resources from the mathematician and fiber artist. See and read more about Taimina's fiber sculptures by visiting her artwork and blog. Books by this adjunct associate professor in the Department of Mathematics
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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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 Dana Mackenzie
Author of The Universe in Zero Words and The Big Splat, or How Our Moon Came to Be, freelance mathematics and science writer Dana Mackenzie also contributes to the series What's Happening in the Mathematical Sciences published by the American Mathematical
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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 Statistics  British Psychological Society
Four short films demonstrating statistical concepts through dance. Each video clip intersperses clips of modern dance with observations and prompts that relate spacing, timing, and other aspects of the dancers' positions and movements to statistics concepts
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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 PreAlgebra Who's Boss, and Girls Get Curves. Read about McKellar's voiceover
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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 ebusiness and data mining. Site contains papers (downloadable, PDF format), software
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 DanielSoper.com  Soper
Statistics calculators from the California State University (Fullerton) professor of information systems and decision sciences: analysis of variance (ANOVA), beta distribution, beta function, binomial distribution, chisquare distribution, confidence
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 Daniel Willingham
From the author of Why Don't Students Like School? and When Can You Trust the Experts? (subtitled: "How to tell good science from bad in education"). See, in particular, Willingham's articles, such as "Why transfer is hard," "Why students remember or
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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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 DapJ Music
Rap music for adolescents struggling to learn and retain math concepts: "Fractions Are Division Problems"; "Keep, Change, Change"; "Properties"; "First, Outer, Inner Last"; and more. The educationally based music production company provides Common Core
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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 realworld 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 3003page 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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