 MathWorlds  SimCalc: Simulations for Calculus Learning
MathWorlds enables students to learn through exploration of animated worlds and dynamic graphs. The worlds present moving objects and characters in a variety of settings, such as elevators in a building or duckies on a pond. Manipulable graphs control
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 MathXL  Addison Wesley Longman
A Webbased tutorial system based on Addison Wesley math texts. For PCs running Windows 95, NT, 98, or 2000. MathXL offers practice tests correlated to the chapter tests in your book; personalized study plans, based on your test results, that list the
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 Mathzone  Angelo Mingarelli, Carleton University
Mathzone features online calculus quizzes and exams, as well as one testing "everyday math." It also offers several downloadable programs, including a Javascript applet about the 3n+1 sequence, and a demo version of software that qualitatively plots polynomials
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 Matrix Market  Applied and Computational Math Division, NIST
A visual repository of test data for use in comparative studies of algorithms for numerical linear algebra, featuring nearly 500 sparse matrices from a variety of applications, as well as matrix generation tools and services. Browse by collection, matrix
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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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 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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 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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 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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 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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 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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 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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 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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 Mega TicTacToe  Paul Nahay
A Java applet that plays TicTacToe, Connect Four, Gomoku, and hundreds of customizable original variants.
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 The Menelaus Theorem  Cut the Knot!, Alexander Bogomolny
Ceva's and Menelaus' theorems compared and two proofs of the latter. An interactive column for MAA Online that uses a Java applet to simulate a puzzle or mathematical problem, one not stated directly since the applet is intended to be such that the right
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 Merlin's Magic Squares  Cut the Knot!, Alexander Bogomolny
The toy game of Merlin is not quite trivial and the mathematics is simple enough to provide an entertaining exercise in a Linear Algebra class. The original game is played on a 3x3 array of buttons that toggle between two states. The goal of the game
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 MERLOT Mathematics Portal  MERLOT (Multimedia Educational Resource for Learning and Online Teaching)
Free highereducation online teaching materials, and a user community centered around those materials. Free registration allows users to create, contribute, collect, and comment on resources, or become a peer reviewer or guest speaker. The site offers
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 Metamath  Norman Megill
A site for proofs and logic. Includes: Metamath Solitairea Java applet that lets you build simple proofs in logic and set theory (builtin: the axioms of logic and ZFC (ZermeloFraenkel with Choice) set theory) with source code and other web resources;
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 metarith
metarith challenges you to add, subtract, multiply, divide, exponentiate, and basechange your way to a target value. Similar to the 24 game, this JavaScript lets you choose the countdown clock you race against, the size and sign of the quantities it
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 Metric and English Unit Conversions  Science Made Simple, Inc.
Convert between different unit measurements, both English and metric: area, length, temperature, time, volume, weight, or fruit (apples to oranges).
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 Metric conversion  Dejan Posedi
Convert units of length, weight, speed, temperature, time, volume, area, power and energy. Also available in German.
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 Metric Conversions
Online metric conversion calculators for length, area, volume and weight along with some of the units origins and some conversion tables for printing.
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 Metric Unit Conversion  GlobeFeed.com
Online metric unit conversion calculators for the units of weight, length, temperature, volume and area.
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 Metropolis walk  Vladimir Gusev
An applet illustrating the Metropolis walk, a statistical algorithm for numerical analysis, which can be used to generate any probability distribution. The applet uses the Metropolis walk to generate the most common Gaussian distribution.
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 MiaBella  MiaBella, LLC
Online tool for plotting multiple linear regression results in 3D. Requires a WebGLcapable browser.
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 Middle School Geometry (Manipula Math)  International Education Software (IES)
Over 50 applets illustrating topics from plane geometry: angles and parallel lines; congruent figures and triangles; quadrilaterals and conservation of area; similar figures; polygons; circles; and the Pythagorean Theorem.
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 Mighty Number
This "search engine for numbers" returns facts about figures, such as its square root, base 10 logarithm, and primality. Mighty Number also writes out quantities in several different languages (English, German, French, Spanish, and Swedish) and represents
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 Mike's Math Club  The Milken Family Foundation
A curriculum enrichment program, Mike's Math Club provides "handy hints" that promote mastery of such basics as doubledigit multiplication, and math games that show elementary school students how to use logic and deductive reasoning to create strategies
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 MiLearn High School Course Complements
Curriculumbased high school level math resources in an interactive, "concept, example, application" web design. Courses contain over 500 web pages of stepby step examples and solutions; free demos are available on the site. MiLearn also provides consulting
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 The Millennium Sphere  The Cooper Union
Jean Le Mee, Manuel A. Baez, and a team of their Cooper Union students submitted the Millennium Sphere for an international timecapsule competition sponsored by the New York Times Magazine. Watch a Shockwave animation of Ad Quadratum generation that
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 MiniWebtool  Kevin Liu
Online math tools include an average calculator, base converter, basen calculator, binary calculator, binary converter, binary to decimal converter, binary to hex converter, binary to octal converter, bitwise calculator, compound interest calculator,
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 The Mint  The Northwestern Mutual Life Insurance Company
Learn about starting your own business, saving and investing, government spending, making a budget, learning and earning (the financial rewards of finishing school), and your role in the economy. Lesson plans for parents and teachers include Financial
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 Mirek's Cellebration: 1D and 2D Cellular Automata explorer  Mirek Wojtowicz
A large (120+) collection of 1D and 2D Cellular Automata. The site includes a lexicon, gallery, pattern of the week, CA families, rules, patterns, and links, with a CA tutorial and art. Also free Windows and Java software running all listed rules. The
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 Miscellaneous (Manipula Math)  International Education Software (IES)
More than 30 miscellaneous Java applets, covering linear transformations of lattices and lines; the area of a parallelogram; inner products; complex numbers; fractals; vectors; life game; line and dot product; hyperbola; parabola; shadow trace; rectangular
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 Miscellaneous Mathematical Utilities  David Binner
Several online mathematical utilities intended for college and university students (math, physics, engineering, etc. students). Numerical utilities to solve (among others): N Equations in N Unknowns, Eigenvalues and Eigenvectors, Roots of Functions, and
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 Mission: Critical  San Jose State University, California
A selfpaced interactive tutorial for critical thinking. Introduce your students to the basic concepts of logic. Immediate reinforcement to a series of increasingly complex exercises is provided after each right or wrong answer.
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 Miss Lindquist: The Tutor  Neil Heffernan
A free Web tutoring system for middle school and high school students concentrating on writing expressions for algebra word problems. Teachers can assign portions of this site for homework, students can get help as they do their homework, and progress
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 The (Mock) Exchange  Sean Rasmussen
Most stock market simulators use real world stocks; as such, the virtual trader cannot affect the price of the shares. The (Mock) Exchange is a completely closed system, so a more realistic simulator; with each trade, you can potentially influence the
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 Models, Charts and Magnetic Data for Navigation  British Geological Survey
"Geomagnetic field models are used in navigation, geophysical surveys, oil production, and in scientific studies ranging from the upper atmosphere to the Earth's deep interior." In particular, produce free maps online using the BGS's World Magnetic Model
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 Modes of Thinking  Cut the Knot!, Alexander Bogomolny
Mathematics is verbal for it's a language, and it is abstract for in its heart one finds proofs and axiomatizations. It is symbolic, rational, logical, and, nowadays, it is very digital. These are all indications that mathematics is firmly entrenched
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 Modular Arithmetic Calculator  Paul Trow
The Modular Arithmetic Calculator performs arithmetic modulo m, and calculates square roots when m is prime.
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 Modular Arithmetic  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
An essay on modular (or modulo) arithmetic, an unusually versatile tool discovered by K. F. Gauss (17771855) in 1801, with related links.
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 The Modular Forms Database  William Stein
A collection of tables related to modular forms, elliptic curves, and abelian varieties. With links to the WatkinsStein tables of elliptic curves; the Elliptic Curves Information Calculator; PARI & MAGMA (computer algebra) online calculators; links
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 Moneybee Multiplayer PreAlgebra  Jordan Pollack
Interactive peer tutoring site where pairs of learners create "coin puzzles" for each other to solve. Requires free registration, as this is an educational psychology research project.
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 Money Cents  MoneyCents, Inc.
Cartoon characters introduce the basics of saving and spending money. Interactive calculators to investigate sales and car loans, history quizzes, and Shockwave games.
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