 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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 Data Description, Inc.
Makers of data analysis software and computerbased training packages. The data analysis software is designed for data visualization, data mining, and statistical analysis; the computerbased training packages are selfpaced, 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: K2
A sample chapter from
Picturing Math by Carol Otis Hurst and Rebecca Otis (SRA/McGrawHill, 1996, ISBN 0026873672). "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 datasharing 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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 DataStreme Atmosphere  American Meteorological Society
A major precollege teacher enhancement initiative of the American Meteorological Society (AMS). Its main goal is the training of K12 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 cowritten.
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 Dave's Geometric Pix Gallery  David Joyce; Dept. of Mathematics & Computer Science, Clark University
Mandelbrot and Julia sets, with a generation form and an Explorer on which you can point and click to get more refined images;
Newton Basins and a form to generate them; a page describing tiling the hyperbolic plane; some wallpaper groups; a gallery
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 Dave's Mathematics, Education, Philosophy and Chreods Server  Dave Wilson
Searchable math and mathematics education resources: an archive of preservice teachers' essays, the Teaching and Learning Enquiry Group, Chreods, a journal covering math education, and other writings.
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 Dave's Math Tables: Areas, Volumes, Surface Areas  David Manura
Formulas for and diagrams of: areas of polygons (square, rectangle, parallelogram, trapezoid, circle, ellipse, triangles); volumes of polyhedra (cube, rectangular prism, irregular prism, cylinder, pyramid, cone, sphere, ellipsoid); surface area (cube,
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 Dave's short course on Complex Numbers  David Joyce; Clark University
An introduction to complex numbers, including a little history (quadratic and cubic equations; Fundamental Theorem of Algebra, the number i) and the mathematics (the complex plane, addition, subtraction; absolute value; multiplication; angles and polar
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 David Bailey's World of Tessellations  David Bailey
Some high quality tessellations of a "representational" nature, as exemplified by M.C. Escher. Includes notes on the designs themselves, the design process, the history of tessellations, and references.
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 David Bruce Wilson
David Bruce Wilson researches probability, combinatorics, and theoretical computer science. Abstracts of his articles on these subjects are available on the web and may be downloaded in PostScript or .dvi formats. Software available for download includes
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 David Eppstein's Teaching  David Eppstein
Archives of Information and Computer Science courses in computational statistics, computability, design and analysis of algorithms, computational geometry, game programming (Java versions of mancala, othello, and fanorona), graduate data structures, computational
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 David Goodman's Math Links  David Goodman, editor
Link listings for a variety of topics, organized by those topics.
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 David J. Wright  Mathematics Dept., Oklahoma State University
Wright's main field is number theory, particularly algebraic number theory and algebraic groups, with methods from functional analysis and analytic number theory. Papers: Observations of N. Katz on the finer distribution of Gauss sum angles and similar
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 David Marius Bressoud
David Bressoud has written several undergraduate textbooks that use physics and the history of mathematics to motivate the study of multivariable calculus, number theory, real analysis. Other books include A Course in Computational Number Theory and
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 The David Mulhall Centre  David Mulhall
Site with resources and suggested treatments for people with Dyslexia, Dyscalcula, Dyspraxia and Attention Deficit Disorder. Extensive site, linking to The David Mulhall Centres in London and the UK.
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 David Pollack
Download the author's thesis, "Explicit Hecke Actions on Modular Forms" (Harvard, 1998) in DVI format.
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 David Royster's Home Page  Dept. of Mathematics, Univ. of North CarolinaCharlotte
Research and Scholarly Interests  Papers: Algebraic and Differential Topology; Use of Computer Algebra Systems in Mathematics Education. See also MAED 3103, a course for Secondary School mathematics teachers covering material drawn from Algebra I and
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 David's Math Pages  David E. Dirkse
Freeware includes GraphicsExplorer (plotting equations, curve fitting, differentiate, integrate, use constants a,b,c changable at mouseclick, graphics adjust...), linEq (solve systems of lin. equations and watch GaussJordan elimination step by step...),
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 DavidsoftNet  David Strauss
A site that organizes and presents Texas Instruments (TI) calculator software and other resources on the Web in folders and categories, much like Yahoo. TI Calculator links are broken down into assembly coding sites, hardware sites, major sites, TI85
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 David Sumner's Home Page  David Sumner
Study guides, exams, quizzes, problem sets, exam review materials, utilities, programs and simulations, syllabi, and other materials for courses such as calculus, sequences and series, graph theory, number theory and cryptography, and probability. The
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 DavidZiskind.Org  David Ziskind
Articles discussing variational problems, ordinary differential equations, series reversion, least squares regression, quantifiers, extrema, internal rate of return, and other mathematical topics.
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 The Da Vinci Game  Martin Woods & Allison Carmichael
A board game with 800 challenges, including 200 numerical Logic Key questions. These can involve solving equations, using probability or applying lateral thinking, such as in the question: "cone alone flour minus call".
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 Davitily Math Problem Generator  Nguyen, Ly; and Pardue, David
Create worksheets and tests, including options for multiple choice, printable versions, and answer keys. Click to insert preworded questions in basic math, algebra, and geometry, the parameters of which vary randomly. Requires JavaScript. Also available
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 A Day at the Office (Global Citizen Project)  Georgia Perimeter College
Your new boss assigns you to get on the Internet and find out as much as you can about data mining  who's doing it, why are they doing it, what benefits could the company receive if we did it, what software is available and the cost of the software,
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 DC Proof  Dan Christensen
New software to teach the fundamentals of logic and proof. Enables user/student to write errorfree proofs by selecting rules of inference, axioms, etc. from convenient dropdown menus. Includes tutorial with exercises.
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 DeadLine OnLine  Ionut Alex. Chitu
Freeware that graphs equations and precisely estimates their roots. It includes the option to evaluate the function and the first two derivatives, find extrema of the function and integrate numerically. For Visual Basicenabled computers running Windows
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 Deal.II: A Differential Equations Analysis Library  Wolfgang Bangerth, Ralf Hartmann, and Guido Kanschat
This C++ program library targets the computational solution of partial differential equations (PDEs) using adaptive finite elements. Among other features, it works for one, two, and three space dimensions; handles locally refined grids, fully supporting
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 Deal or No Deal > Game  NBC
A Flash version of the television game show hosted by Howie Mandel. Begin by choosing one of 26 briefcases. Each contains cash  as little as one cent to as much as one million dollars. Then either stay with your original briefcase choice or make a "deal"
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 Dear Marilyn, About Leap Years (Math Chat)  Frank Morgan, MAA Online
Your explanation [in Parade Magazine] of September 13, 1998 that we may need to skip a leap year EVERY FEW THOUSAND YEARS because the tropical year (about 365.2422 days) is a bit shorter than the average calendar year (365.2425 days) neglects CHANGES
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 Decibels (Math Chat)  Frank Morgan, MAA Online
Challenge: The Christian Science Monitor of July 8, 1999, reports that "according to the NRDC, the amount of ambient noise in the ocean may have increased by 10 decibels  in other words, 10fold  between 1950 and 1975." Is this correct?
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 Decimal Coins of the UK  Tony Clayton
The change to decimal coinage: Decimalisation Day. DDay was February 15th 1971. On that day the United Kingdom changed from the centuries old tradition of using 12 pence to the shilling and 20 shillings to the pound to a new decimal 100 new
pence to
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 Decimal numbers (Middle School Math)  Homeworkhelp.com, Inc.
A lesson on decimals: What is a decimal number? Converting fractions to decimals, and decimals to fractions; Adding and subtracting decimal numbers; Multiplying decimal numbers; Dividing decimal numbers; Rounding.
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 Decimal Places on a Number Line  NASA Lewis Learning Technologies Project
Decimal places: On a number line, which of the following numbers would be the farthest to the right? 0.001, 0.0015, 0.00099, 0.0005. A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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