 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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 Meddling in the Affairs of Infinity  Shohdy Nagib
How to use feedback between your video camera and your television set to produce "hypnotizing video effects" related to fractals. Site also available in Russian.
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 Media4Math
Free algebra and geometry videos, PowerPoint presentations, Promethean Flipcharts, critical thinking activities, workedout examples, and other media resources. An initiative of Emmy awardwinner Edward de Leon, executive producer of "Greatest Inventions
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 The Median Isn't the Message  Stephen Jay Gould
A personal story of statistics and "stretching the truth with numbers"; according to Steve Dunn, "the wisest, most humane thing ever written about cancer and statistics. It is the antidote both to those who say that, 'the statistics
don't matter,' and
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 The Medians  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Interactive proofs (elementary geometry, barycentric coordinates, complex numbers, Ceva's theorem, affine geometry) of the fact that the three medians of a triangle meet at a point called the centroid. See also The medians, contributed by Scott Brodie.
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 Medicine and Mathematics  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about medicine and mathematics, such as "How do doctors use math?"
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 Medieval Harmony  Ivars Peterson (MathTrek)
Harmonic numbers. The history of mathematics contains many gems of mathematical reasoning and thought. At a Mathematical Sciences Research Institute meeting last October, number theorist Hendrik W. Lenstra Jr. of the University of California at Berkeley
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 MEECAS  Mathematics Educators Exploring Computer Algebra Systems, Inc.
Mathematics Educators Exploring Computer Algebra Systems (MEECAS) seeks to encourage active interest in the use of computer algebra systems (CAS) and related technology in schools; to improve learning of mathematics; to influence curriculum, assessment,
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 MegaCalculator  Don Benish, Benish Industries
From the MegaConverter site. A webbased scientific calculator with which you can add, subtract, multiply, divide, take square roots, do powers, logarithms, sin, cosine, tangent, statistical functions and more.
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 megaConverter.com  BenCam InterMedia
megaConverter.com is an evergrowing set of weights, measures and unit conversion/calculation modules. Spin a dial to select the kind of unit to convert: ancient lengths, volume, weight; angles; area; astronomical distance; bases  dec/hex/oct/bin; density;
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 MegaPenny Project  Kokogiak Media
What would a billion (or a trillion) pennies look like? Find out here, in pages listing data on one to one quintillion pennies. All the pages have tables at the bottom, listing things such as the value of the pennies, size of the pile, weight, and area
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 Mega TicTacToe  Paul Nahay
A Java applet that plays TicTacToe, Connect Four, Gomoku, and hundreds of customizable original variants.
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 Meikleriggs' Mathematics  Peter Mitchell
An archive of the Newcastle Royal Grammar School's Mathematics' Department, which has scanned in handwritten STEP Mathematics' papers as well as GCSE and Alevel Structured Mathematics on the MEI model. Register to see, in particular, the Examinations'
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 Members & Activities (AMS)  American Mathematical Society
Includes information and resources on Membership in the AMS (becoming a member, individual, institutional, associate, and corporate membership, FAQ); Membership Benefits (Membership List, eMail Forwarding, Meetings and Conferences, Notices, Bulletin);
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 Memory, Mental Arithmetic, and Mathematics  MacTutor Math History Archives
All the mathematicians whose biographies are given in the MacTutor archive exhibited extraordinary mental powers. This article examines a few mathematicians who showed extraordinary powers of memory and calculating, together with a number of people who
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 MendelWeb  Roger B. Blumberg
An educational resource for teachers and students interested in the origins of classical genetics, introductory data analysis, elementary plant science, and the history and literature of science. Constructed around Gregor Mendel's 1865 paper "Versuche
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