 Matrix Calculator  Jim McCoy, Canned Doit Software
Software for MS Windows operating systems. Download a 7 day evaluation copy or purchase a license.
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 The Matrix Cookbook  Kaare Brandt Petersen and Michael Syskind Pedersen
PDF of a free downloadable desktop reference on matrix identities. See also the Petersens' accompanying blog, which dates back to June, 2007.
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 A Matter of Appreciation  Cut the Knot!, Alexander Bogomolny
It is possible to learn to appreciate painting without being a painter... by analogy, it is possible to appreciate mathematics without being a mathematician. Appreciation does not require mastery, but it is impossible without adequate knowledge. Knowledge
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 matthen  Matthew Henderson
"Things of interest in maths & science" created by a PhD candidate in Statistical Dialogue Systems who majored in mathematics as an undergraduate. Posts date back to March 2011, and routinely feature Henderson's original animated gifs: "Orbits around
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 Matthew J. Saltzman's Home Page  Matthew J. Saltzman
A study guide for basic math courses, titled "How to Survive Your College Math Class (and Take Home Something of Value)," includes sections on study skills, reading and understanding mathematics (featuring "An Equation is a Sentence," "Deriving Conditions
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 MatthewMaddux Education  Egan J. Chernoff
"Information associated with mathematics (education)," as digitally curated by Chernoff, a Professor of Secondary Mathematics in the College of Education at the University of Saskatchewan. Posts, which date back to June, 2011, have included "New math
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 MAV Publications Catalogue  Mathematics Association of Victoria
Descriptions and listings of publications: Primary; Primary/Secondary; Secondary; MAV Conference Books; Deakin University Press Publications; Curriculum Corporation Publications; Hawker Brownlow Publications; Price List and Order Form; 1998 MAV CAT Preparation
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 Maximize Volume of a Box  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about maximizing the volume of a box, such as "Find the formula for the greatest volume box you can make from a sheet of cardboard with differentsized corners cut out of it."
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 Maximizing Cylinder Volume  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about maximizing the volume of a cylinder, such as "We are excited to unveil a new feature this month, Site Map.Find the largest possible volume of a right circular cylinder that is inscribed in a sphere of radius r."
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 Maximum Volume & Area with the Geometer's Sketchpad  David Purdy, Wisconsin Heights High School, Mazomanie, WI
Common in calculus and advanced algebra texts, these wellknown optimization problems now appear in high school geometry texts as interesting explorations that integrate measurement, model building, polynomial functions and use of the graphing calculator.
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 Maxis Education  MaxisEducation.com
Live math tutoring via the Internet. Maxis offers a moneyback guarantee.
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 Maxwell's Demon  Edmund Harriss
Harriss, a mathematician and artist of substitution tilings, tilings with a scaling symmetry like the Penrose Tiling, writes that "the major themes of this blog revolve around mathematics communication and mathematics art." His posts, which date back
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 The Mayan Adventure
Multipage, JAVAbased, Mayan Adventure games, meant to be fun and instructive. Learn the Mayan number system and mathematics, the Mayan system of timekeeping, and significant facts about Mayan culture and history; learn to decipher up to 40 percent of
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 Mayan Arithmetic  Steven Fought
A discussion of the importance of the Mayan symbol for zero and a tutorial on adding Mayan numbers by Steven Fought, written when he was a junior at Strath Haven High School in Wallingford, Pennsylvania.
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 Mayan Dating, Mayan Astronomy  Bohumil and Vladimir Bohm
Articles describing the calculation of the correlation between the Mayan and Christian systems of dating, and the results of Mayan Astronomy in the Dresden Codex and the Correlation between the Mayan and Christian Systems of Dating. In English, Spanish,
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 Mayan Mars  Ivars Peterson (MathTrek)
In 1601, Johannes Kepler undertook the challenge of deciphering the orbit of Mars and developing a mathematical theory of its motion to fit observations of the planet's changing position in the sky. In assuming that Earth itself traveled around the sun,
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 Mayan mathematics  MacTutor Math History Archives
Linked essay on the mathematical achievements of the people of the Yucatan peninsula, with a description of the Mayan base twenty number system was a base twenty system and illustrations of the Mayan numerals. With references and other related web sites.
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 Mayan Math  Karen M. Strom
The Mayans devised a counting system that was able to represent very large numbers by using only 3 symbols, a dot, a bar, and a symbol for zero, or completion, usually a shell. Charts here show the number cycle, as well as principles of arithmetic.
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 The Mayan Numerals  Michiel Berger
(See also the Maya Calendar page.) Instead of ten digits, the Mayans used a base number of 20. They also used a system of bars and dots as "shorthand" for counting: a dot stood for one and a bar stood for five. This page provides a table of numerals and
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 MayaQuest  Classroom Connect
In February 1995, the MayaQuest team led by adventurer Dan Buettner embarked upon a wholly kiddirected bicycle expedition into the Maya world of Guatemala, Mexico, Belize and Honduras. The goal of the threemonth expedition was to engage kids and their
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 Maze Design  Adrian Fisher
What's new in the maze world? The latest maze news, plus general maze information: Tessellations & Tiling Patterns; 1998 Dragon Maize Mazes; World's Best Mazes for families to visit; World Maze Database (all the mazes on Earth, country by country);
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 Maze Page  Jo Edkins
A page that illustrates the four main groups of unicursal mazes or labyrinths: mazes with a single path to the centre and no branches. This is the oldest form of maze, with examples all round the world. Contents include What are Mazes For?; A maze design
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 Möbius and his Band  Ivars Peterson (MathTrek)
A Möbius band (or strip) is a surface with only one side and one edge. You can make one by joining the two ends of a long strip of paper after giving one end a 180degree twist. An article about a geometrical theory of polyhedra; Euler's formula
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 Möbius at Fermilab  Ivars Peterson (MathTrek)
Sculptures by Robert R. Wilson, threedimensional versions of the usual "onesided" surface, one on the grounds of the Fermi National Accelerator Laboratory (Fermilab) in Batavia, IL, another near an entrance to the Science Center at Harvard University
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 Möbius in the Playground  Ivars Peterson (MathTrek)
Many people are familiar with the remarkable onesided surface known as the Moebius band. You can easily make one by gluing or taping together the two ends of a long strip of paper after giving one end a half twist... At the Sugar Sand Science Playground
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 The Möbius Project  Maplesoft
Create, share, and grade Maple documents that feature interactive elements such as sliders and buttons.
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 M. C. Escher: (18981972)  Brendan DJ Murphy
Links to pages marketing M.C. Escher products, including posters, mugs, and tshirts.
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 M. C. Escher  François Loup
Des informations pour le monde francophone sur Maurits Cornelis Escher: biographie, bibliographie, diaporama, les thèmes, technique graphique, expositions et musées, les héritiers d'Escher, éspace éducation, aide documentaire,
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 McSquared  Audrey McLaren
Blog of "a teacher's realtime journey into Web 2.0" for "anyone who loves to teach, loves technology but feels easily overwhelmed by it, nevertheless feels compelled to learn how to use it, needs things explained real slow like, is not afraid to ask
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 Meaningful Learning Research Group  Dr. Joseph Novak
The group works with a number of common beliefs, primary among them the idea that the best way to teach is to determine what the student already knows, and then to teach from there. They believe that teaching and learning grounded in a coherent theory
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 Mean, Median, Mode, etc. (SMILE)  Charlotte Goldwater, Kenwood Academy
A lesson for grades 412 designed to teach students to generate their own data and then analyze their information, teaching such concepts as mean, mode, and median; histogram; bar graph; probability; and circle graph. From the Probability and Statistics
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 The Means  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Two similar and oftenconfused problems, the difference between them not immediately obvious, showing that depending on the circumstances, to determine the average speed of motion, computations based on the same basic formula (S = D/T) may have to follow
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 Measurement Conversions  ConvertValues.com Measurement Conversions
A simple tool for converting different measurement units: length, area, volume, weight, mass, time, temperature, speed, force, power, and more.
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 Measurement Converter  Entisoft Units; ConvertIt.com, Inc.
Many online calculators require a Javacapable browser. Here's one that doesn't, and will perform over 500 different unit conversions for distance, area, volume, mass, speed, temperature, pressure, energy, power, force, etc. And when you convert, say,
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 Measurement Databases for Industry & Science  G. Raymond Peacock
An open, searchable directory of measurement data resources and databases
from industry & science including properties of matter, specialty
calculators, units and conversions, glossaries and data collections plus
free software.
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 Measurement of Objects Using Similar Triangles in The Plane (SMILE)  John Gabrielson, Chicago H. S. for Agri. Science
A high school geometry lesson designed to apply the use of similar triangles to a sight tool in order to measure the distance between or height of large objects such as buildings or trees. From the Geometry and Measurement section of a collection of almost
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 Measurement of Volume (SMILE)  Richard Murray, Gage Park High School
A lesson designed to teach students to measure the volume of a clear container; use a stop watch; and estimate the volume of a container using proportions. From the Geometry and Measurement section of a collection of almost 200 single concept lessons
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 Measurements Converter  Sergey Gershtein
JavaScript conversions in the following categories: weight, capacity and volume, length, area, speed, pressure, temperature, circular measure, and time. [Do not use this converter if you need precision calculations.] You will need a Javacapable browser
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 Measurement Units Translation  Sergey Gershtein, UralRelcom, Ltd.
Javascript converters for weight, capacity and volume, length, area, speed, pressure, temperature, circular measure, and time.
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 Measurement  What Is It? (SMILE)  Claudy E. Chapman, Hartigan School
A lesson designed to teach students practical reasons for measurement; the use of various tools for measurement; how and why those tools might be chosen and/or designed; and the need for uniformity and agreement on definitions of measurement. From the
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 Measurement Wizard  The Association of Religion Data Archives
Survey data measuring key concepts in the study of religion, each detailed with
scope, frame (i.e., audience), sample (e.g., random, etc.), and mode (phone, etc.). Browse or search for practices, beliefs, and opinions about congregational characteristics
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 The Measurers: a Flemish Image of Mathematics in the Sixteenth Century  Museum of the History of Science, Oxford
From a 1995 exhibition centered around an unusual and important painting in the Museum's collection, known simply as 'The Measurers' (Antwerp, late 16th century). The painting depicts a range of practical activities, foremost among them mathematical instrument
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 Measuring America  Andro Linklater
Measuring America is the story of why America has ended up with its unique system of weights and measures — the American Customary System, unlike any other in the world — and how this has profoundly shaped our country and culture. In the process, the
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 Measuring an Angle  NASA Lewis Learning Technologies Project
What is the measure of the angle shown? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Measuring Centimeters  NASA Lewis Learning Technologies Project
If a pencil were 7.5 centimeters long, where would its point end on this centimeter ruler? A diagram and a detailed answer are provided. From NASA's 9th Grade Math Proficiency Test.
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 Measuring Temperature, Adding Degrees  NASA Lewis Learning Technologies Project
From the thermometer reading below, about how many more degrees must the temperature rise to reach 50 degrees? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Measuring Up, Prototypes for Mathematics Assessment  National Academy of Sciences
An electronic version of Measuring Up, a book on assessing students in accordance with the NCTM math standards by the National Research Council that provides examples of problems students should be able to solve at a fourth grade level and insights on
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 Measuring What Counts: Executive Summary  MSEB, National Research Council
"'You can't fatten a hog by weighing it,' said a farmer to a governor at a public hearing in order to explain in plain language the dilemma of educational assessment. To be useful to society, assessment must advance education, not merely record its status...."
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 Mechanical calculators  Gerold Beckers
Mechanical calculators in the author's private collection and the museum of the faculty of Geodesy, TU Delft, the Netherlands. The calculators are catalogued according to the working principle. Contents include: Napier's rods or bones, abacus and slide
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 Mechanical Linkages  Jackiw, Koedinger; Key Curriculum Press
Four sketches illustrating various mechanical linkages: a windshield wiper, a sewing machine, elevator doors, and Peaucellier's Linkage.
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