- Dien dàn Toán hoc.net
A math site in Vietnamese.
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- A Difference - Darren Kuropatwa
This Winnipeg pre-calculus teacher's blog serves to "... record and reflect on my personal evolution of how to integrate ... technologies into my teaching." Blog posts dating back March, 2005, include "Wikis As Assessment For Learning Tools" and "Great
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- Differential Equations (calculus@internet - Mathematica) - Christopher A. Barker
Mathematica Track. 1. Basics (Mathematica Overview; The Environment; Arithmetic; Using Variables; Working with Lists; Vectors & Matrices; Algebraic Operations; Functions; Calculus Operations; Graphics). 2. Differential Equations (Creating Slope Fields;
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- Differential Equations - Math Forum
Links to some of the best Internet resources for differential equations: classroom materials, software, Internet projects, and public forums for discussion.
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- Differential Equations (S.O.S. Mathematics) - Dept. of Mathematical Sciences, Univ. of Texas at El Paso
An online course: learning units presented in worksheet format review the most important results, techniques and formulas in college and pre-college differential equations. Sections include: Introduction and First Definitions; Modeling via Differential
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- Differential Geometry (Graphics Archive, Special Topics) - The Geometry Center
Using differential calculus to study curves and surfaces in space.
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- Differential Geometry Images - Walter Seaman
Animations of differential geometry topics: images constructed by Seaman using the programs in Modern Differential Geometry of Curves and Surfaces with Mathematica (Second Edition) by Alfred Gray. Topics include: Curves with prescribed curvature and torsion;
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- A Different Kind of Multiplication - David P. Stern
Roman numerals were an improvement on older notation and useful for the abacus, but seemingly impractical for multiplication. Yet a multiplication method was developed, and is described here. The Romans did not understand why it worked, but we now realize
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- Different Ways to Represent Numbers - Chad Lake
Online paper that discusses and illustrates counting in bases other than 10; converting to decimal; the Snake Algorithm (the algorithm, summary of binary-to-decimal Snake Algorithm, decimal-to-binary Snake, extending the Snake to other bases, and summary
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- Digital Deletions - Pierre Ysewijn
An interactive JavaScript version of Conway's Digital Deletions game, in which numbers in a string are lowered to zero or erased. Users can play with different numbers of digits, different strategy levels, different starters, different sources of digits
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- Digital Generation Unit Conversions - Digital Generation
Choose from 26 different categories of engineering and scientific units. Also available at http://www.webcom.com/legacysy/convert2/convert2.html and http://www.legacysy.com/~legacysy/convert2/convert2.html.
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- Digital Library: Science, Mathematics, Engineering and Technology Education (SMETE) - NEEDS
This site contains a searchable working prototype of a National Science, Mathematics, Engineering, and Technology Education Digital Library; a prototype federated search for the math community and the American Mathematics Metadata Task Force (AMMTF);
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- Digital Library - The Exploratorium, San Francisco
The Exploratorium A-to-Z. Archived webcasts, web cams, past exhibitions: stills, movies, sounds, and other experimental items. Online versions of a few of the Exploratorium's interactive exhibits; the Exhibit Cross-Reference - an experimental database
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- Digital Mathematical Performance - Gadanidis, George; Borba, Marcelo; Hughes, Janette; et al.
Watch video, live-acted dramatic storyboards, and animations of how people "perform" mathematics: Flatland, "Help Me, Fermi," Should Parallel Lines Never Meet," "The Pleasure of Making 10" (linear equations), "The Waiter" (the missing dollar problem),
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- Digital Mathematics Archive - SunSITE.UBC.CA
A digital collection of mathematical sources, with a primary focus on documents from the late 19th century through today. Papers, letters, manuscripts, e-mail messages, Usenet-news postings, computer rendered images and computations, program source code.
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- The Digit Connection - Lizzie
A tribute to the number pi through music, poetry, and fiction. (Meet Sailor Pi!) Also includes a brief history of pi with some ways to calculate it, a quote collection, and ways to celebrate the number - even if it's not Pi Day.
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- Digits, Squares, and Cycles - Ivars Peterson (MathTrek)
Fascinating patterns lurk among the digits of whole numbers. Pick a positive integer, such as 57. Square each of the digits, then add the squares together: 5^2 + 7^2 = 25 + 49 = 74. Do the same thing with the digits of 74: 7^2 + 4^2 = 49 + 16 = 65. Keep
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- DIGSTATS - Statistics - Central VA Governor's School for Science and Technology
Pages for descriptive statistics, inferential statistics, and graphical analysis, from the 1997 Central VA Governor's School for Science & Technology. Activities for spreadsheets and the graphing calculator that explore measures of central tendancy
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- DIMACS Research and Education Institute (DREI) - Rutgers University
An institute from the Center for Discrete Mathematics and Theoretical Computer Science which takes the approach that research and education should work hand-in-hand, that collaborations between researchers and educators are formed by understanding each
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- DIMACS - Rutgers & Princeton Universities, AT&T Bell Labs, BellCore
The Center for Discrete Mathematics and Theoretical Computer Science, an NSF Science and Technology Center. DIMACS is devoted to the development of the interrelated fields of discrete mathematics and theoretical computer science, among the most rapidly
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- Diophantine Equations - Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about Diophantine equations, from "find all positive integer solutions to 43x + 7y + 17z = 400" to a general method for solving them.
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- Direct and Indirect Variation - Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about direct and indirect variation, with explanations of the difference between them and how to graph variation.
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- Directory of Scholarly and Professional E-conferences - Diane K. Kovacs and The Directory Team
Descriptions of electronic conferences (e-conferences) on topics of interest to scholars and professionals for use in their scholarly, pedagological and professional activities. E-conference is an umbrella term that includes discussion lists, Internet
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- Dirichlet Sketches - Jim King, Key Curriculum Press; Math Forum
Three sketches showing the Dirichlet or Voronoi regions corresponding to configurations of 3, 4, or 5 points.
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- Disabilities and Math Anxiety - Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I help my child who has a physical or learning disability?
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- Discount Textbooks.net - Imedia Technologies, LLC.
A search engine for various booksellers, focussing on new and used textbooks from various disciplines including mathematics. Using the search settings, you can compare total price (including shipping) from over the 50 sources involved.
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- Discoveries & Breakthroughs Inside Mathematics - American Mathematical Society (AMS)
Read articles and watch video news segments about the latest discoveries and applications of mathematics: "Do the Math Dance," "Mathematician Calms the Skies with Turbulence Detection Algorithm," "Become a Smarter Shopper," "The Science Behind Movie Magic,"
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- Discovering Geometry Newsletter - Key Curriculum Press
A free biannual publication providing information and teaching techniques for The Geometer's Sketchpad software package, the Discovering Geometry Newsletter is a resource for those interested in geometry and technology education. Download PDFs of past
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- Discover Magazine - The Walt Disney Company
The monthly magazine of science and technology. Covers space, biology, health, medicine, AIDS, computers, new technology, the environment, astronomy, ancient life, archeology, evolution, physics, mathematics, ecology, and more. Available online: selected
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- Discover TI Neighborhood Workshops - Texas Instruments, Inc.
The free Discover TI Neighborhood Workshop provides a hands-on beginner's introduction to TI graphing technology. There will be 25 workshops throughout the United States. There is a choice of six different topics that appeal to middle school and high
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- Discrete Mathematics Graphic Calculator Series - O. T. Lee
A set of booklets written for the Year 12 Discrete Mathematics Programme of Western Australia, integrating the problem-solving process with specific graphic calculator models (Casio CFX 9850G/G+/GB+ and the Hewlett Packard 38G), and including programs
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- The Discrete Mathematics Project - Dominic Peressini; University of Colorado at Boulder
Archived resources from the collaboration of the UC Boulder School of Education and Department of Applied Mathematics. Activities sketch goals, abstracts, brief problem statements, instructor suggestions, suggestions for curriculum integration and further
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- discretemath - Math Forum
A discussion group for subject matter concerning teaching and researching of discrete mathematics at all levels. It began as a closed list for the researchers and educators who participated in the Rutgers University Discrete Math and Theoretical Computer
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- Discrete Math - Math Forum
Links to some of the best Internet resources for discrete mathematics: classroom materials, software, Internet projects, and public forums for discussion.
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- Discrete Math Problem of the Week (PoW) - Math Forum
Discrete math problems from a variety of sources, including textbooks, math contests, NCTM books, and puzzle books, and real-life situations, designed to reflect different levels of difficulty. From 1999 until 2002, this service challenged students with
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- Discrete Math Terms - Jennifer D. Jones, University of Oregon
A glossary of discrete math terms, from "and" and "absorption law" through "characteristic equation," "negation," and "recurrence relation," to "universal bound law" and "vacuously true." Available for navigation without frames.
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- Discussing Undergraduate Mathematics Education on the Internet - Steve Weimar for MAA Online; The Math Forum
Descriptions of good math discussion groups: what kinds of conversations you will find, how to access them, etc. Teaching and learning mathematics: MATHEDU, AMTE, MATHEDCC, DEVELOPMENTAL MATH. Topic-specific lists: MATH-HISTORY-LIST, AP-CALC, AP-STAT,
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- Discussion Groups: Technology - Texas Instruments
Read, search, and post to groups about TI products: Scientific Calculators, TI-10, TI-73, TI-80/81, TI-82/83/83 Plus/Silver Edition, TI-85/86, TI-89/Voyage 200/TI-92 Plus, CAS and Symbolic Math Guide, Graphing Calculator Comparisons, Derive, muLISP, TI
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- Discussion of Block Scheduling - Kidsphere K-12 Mailing List
Dan Johnson, a teacher, describes block scheduling in his school: over 90% of faculty and students favored the new schedule. Discussion of some advantages and disadvantages.
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- Discussions - Math Forum
The Math Forum's discussions include mathematics and math education-related newsgroups, mailing lists, and Web-based discussions. Read recent and older messages, find out how to subscribe to a mailing list that interests you, read an MAA Online article
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- Disfruta Las Matemáticas - Rod Pierce, mathsisfun.com
Spanish language version of Maths is Fun.
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- DISME: The Art of Tenths - Simon Stevin
Definitions appertaining to Arithmeticall whole Numbers. Decimall arithmetike, Teaching how to performe all Computations whatsoeuer, by whole Numbers without Fractions, by the foure Principles of Common Arithmeticke: namely, Addition, Substraction, Multiplication,
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- Disorder in the Deck - Ivars Peterson (MathTrek)
About 30 years ago, tournament bridge players started using computer-shuffled rather than hand-shuffled decks. Almost immediately, there was an outcry protesting the apparently wild fluctuations in the distribution of cards of different suits in computer-dealt
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- Dissections: Plane & Fancy - Greg Frederickson, Cambridge University Press
A book that explores an area of mathematical recreations, called geometric dissections, or the cutting of one or more figures into pieces that can be rearranged to form other figures. With an emphasis on using as few pieces as possible, these geometrical
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- Dissection (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on problems of cutting a region (such as a polygon into the plane) into pieces (possibly putting them together to form a different polygon). Related topics include tiling (in which the whole plane is cut
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- Distance Calculator Between Cities - Dan Gallagher
Enter two cities or countries and this CGI illustrates them on a scaled political map, calculates the distance between the two locations in miles and kilometers, and provides information about latitude, longitude, bearing, and airports. All latitude and
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- Distance Calculus @ Suffolk University - Suffolk University and MathMonkeys, LLC
Calculus on the Web. Contents include: PreCalculus (functions, algebra, trigonometry); Calculus Topics (differential and integral calculus, sequences and series, multivariable calculus, differential equations); Assistance (student, instructor); Curriculum
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- Distance Learning - Pure Science and Mathematics - Distance Learning Course Finder
A directory for those interested in finding out about online learning programs, courses, and seminars offered by a broad spectrum of educational providers. From the home page in addition to searching by subject you may also search by keyword or course
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- Distance, Rate, and Time - Math Forum, Ask Dr. Math FAQ
Distance = Rate x Time: A discussion and two problems.
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- Distance Recipe (Geometry and the Imagination) - Conway, Doyle, Gilman, Thurston; The Geometry Center
A technical definition of how to compute distance. Examples of distances; The Unit Disc Model; Passing from one model to another...
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