 The Monty Hall Problem  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
Let's Make a Deal: If you're shown a goat behind the second of three doors, should you stay with your first choice or switch?
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 Moogie on the Net!  Joseph Emanuel, Emanuel Software
Commercial drill and diagnostic software where the numbers always change. Not meant to instruct students or to present them with new material, but rather, to help them learn the process of solving problems. Software aligned to national and numerous state
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 More Complicated Than It Seems  Kate Nonesuch
In this review of the literature of approaches to adult numeracy instruction, Kate Nonesuch asks the question, "How can ABE math instructors apply research findings to their own teaching practice?" Through an extensive literature review and ongoing discussions
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 More Papercutting Patterns (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Conical, cylindrical patterns, Moebius, and other symmetrical patterns to experiment with.
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 The Most Colorful Math of All (MegaMath)  Nancy Casey; Los Alamos National Laboratory
Coloring is a profound mathematical topic with multimilliondollar industrial applications. The problem presented here has been of interest to mathematicians for over a hundred years. With a few crayons or markers and some handdrawn maps, children can
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 Mothmatic Math Games  Craig Gibson
Animated games for practicing arithmetic skills.
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 Motion Math  Motion Math Inc.
Makers of educational software for iPad, iPhone, and iPod Touch — often set within animal adventures — such as Motion Math Zoom, Hungry Fish, Hungry Guppy, and Questimate.
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 MOTIVATE  Univ. of Cambridge, UK
MOTIVATE is a project incorporating a series of videoconferences, run by the Millennium Mathematics Project at Cambridge. The objectives of MOTIVATE are: to enrich the mathematical experience of school students, to broaden their mathematical horizons,
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 M Puzzle: a Math Line Puzzle  Math Forum
Construct nine triangles by drawing three straight lines through a capital M. Questions, hint, solution.
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 Mr. Martini's Classroom: Math Practice
Flash cards for drill. Press the check to select 5, 10, 25, 50, or 100 card selfevaluation. Miminum verbage to make it accessible to nonEnglish speakers. Works best with later versions of IE but should work well with W3C Mozilla based browsers.
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 Mr. Myers' Classroom  Nathan Myers
Read the puzzle of the week and then submit your answers online. Other "brain busters" include matrix logic puzzles, featuring readymade charts. Explore and identify fraction bars with JavaScript, or geometry with Java applets. Also, fact sheets and
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 Mrnussbaum.com  Greg Nussbaum
Mrnussbaum's Math Lab has games such as Tony Fraction's Pizza Shop; Smart Poll; Cash Out (for practice making change); and Tackle Math Ball, Math Speed, Buffalo Math, and Math Fries (all timed games for practice adding, subtracting, multiplying, and dividing).
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 Mr. R.'s World of Math
Mr. R. has written math poems and a story for his 4th grade students, to help them remember basic math facts. These and other "mathless" poems are available here. The complete story is available for purchase.
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 Mrs. Glosser's Math Goodies  Gisele Glosser
Interactive math lessons that work online and offline in a Web browser, and provide immediate feedback to students, with in addition Worksheets (on circumference and area; exponents; expressions and equations; integers; Ocean Math; order of operations;
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 Mr. Smith's Math Class  Terry Smith
Mr. Smith and his fourth grade students from Eugene Field Elementary School in Hannibal, Missouri, have put together a complete website documenting the work that they are doing this year. The math area of the site features: a request for math problems;
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 MSEB Classics  Mathematical Sciences Education Board, National Research Council
Reports issued between 1990 and 1995, from the MSEB: Mathematical Preparation of the Technical Work Force: Report of a Workshop; What Should I Look for in a Mathematics Classroom?; Achieving Quality in Undergraduate Mathematics (see also Looking for Gauss...or
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 MSPnet: The Math and Science Partnership Network  TERC
The Math and Science Partnership (MSP) Program is a major research and development effort to understand and improve the performance of K12 students in mathematics and science. MSPnet is their electronic community. Learn about individual partnership projects;
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 mtbos directory  Jedidiah Butler
Filter, search, map, or browse through profiles of teachers in the mathtwitterblogosphere. Pulldown menus include roles, geographic regions, and interests; slider bars narrow down the years when someone first started teaching, tweeting, or blogging.
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 Mucho Math  Jake Enfield
Flash program for students to learn math vocabulary and mental math tricks through best practice teaching methods (discovery learning, scaffolding, spiraling, and customized learning). Teachers can create an account and add one student for free to try
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 Muggins! Math  Old Fashioned Products, Inc.
Makers of the arithmetic board games Muggins, KnockOut, Jelly Beans, Fudge, and Opps, all available as single wooden board, reversible wooden board, wipeoff board, or overhead transparency. Manipulatives include Number Neighbors, PreAlgebra for Visual
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 The Mult Applet  Philip Lin
A Java applet for practicing multiplication tables. Tables from 2 to 9 are scrambled and displayed with blanks for the answers. Enter your answers; if you miss any, you get a chance to correct them. If you get them all right the first time, the applet
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 Multicultural Pavilion, University of Virginia  Paul Gorski
Sites for educators interested in multicultural issues. Resources for teachers, including reviews of children's music, multicultural activities, online archives, and links to multicultural websites; papers, book reviews, and published materials; statistical
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 Multimedia Catalogue  Biography Index  Institute and Museum of the History of Science of Florence, Italy
Biographical texts of personalities connected in some way to Galileo. Each text is accompanied by still or animated images or by filmed sequences. Included are Archimedes, Aristotle, Bernoulli, Brahe, Copernicus, the Galilei family, Kepler, Milton, Ptolemy,
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 Multiplication of Decimals  H. B. Meyer, FaustGymnasium Staufen (Mhb)
Interactive training: multiplication of decimals (requires JavaScript). The user has to fill in boxes with proper digits to practice the multiplication algorithm. Problems may be posed either by the user or by the computer. A German version is available.
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 Multiplication Table/ Girandola delle Tabelline  Renato Montemurro
In Italian: Video of the use of a patented Pythagorean windmill for learning multiplication tables. In Italian.
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 Multiplication Tables Help  Math Facts Now!
Order Math Facts Now on CDROM; see free multiplication tables worksheets, teaching tips, game, etc.
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 Multiply!  Dani Kenli
Enter your name and press the "Click to start" button, then key in the products indicated to compete in this selfdescribed "International Multiplication Championship," which ranks your speed and accuracy in a table of the world's multipliers. Refresh
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 Multiplying by Zero  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about multiplying by zero, such as why zero turns other numbers that clearly have a greater value to zero when multiplied?
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 Multiplying Fractions  Millard Lewis, John Moore; Univ. of Georgia
An elementary lesson plan with a worksheet and an interactive exploration of the concept of 3/5 using the Geometer's Sketchpad. From Chapter 6: Rationals: Multiplication, Division, and Applications. A student folder from the Dept. of Mathematics Education/J.
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 The Museum of Scientific Discovery (MSD)
An interactive science and technology center in Harrisburg, Pennsylvania. Online science exhibits, links to other Internet science resources, and Educator's Express, an annual publication designed to familiarize teachers and other group leaders with
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 Museums in the Classroom  Illinois State Museum and Brookfield Zoo
Students from 25 partner schools throughout Illinois are developing online curriculum projects that explore the diversity of Illinois and world ecosystems, integrating collections, data, images, video, audio, text, and exhibitions and using skills from
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 Museu Nacional de História Natural e Ciência  Universidade de Lisboa
"Apoiando a investigação e o ensino nas áreas da zoologia e antropologia, da botânica, da mineralogia e geologia, e das demais ciências naturais, e estimulando o estudo e a divulgação da história das
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 Musical Multiplication  Pat Stevens
Original songs help young students learn the multiplication facts.
Classroom tested method.
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 Music by John Greschak  John Greschak
Platonic Dice: Dodecahedron, Platonic Dice: Hexahedron, Pentominoes, The Tower of Hanoi, and other music compositions based upon the mathematical properties of various objects. Listen with RealAudio or Midi.
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 MVC (Metroplex Voice Computing)
Hands and mousefree arithmetic and math programs for the physically impaired student who cannot use the keyboard. Voiced mathematics products include: ArithmeticTalk (grades 15, for addition, subtraction, division, and multiplication); MathTalk (grades
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 My First Garden  University of Illinois Extension
A garden site that deals with the planning of a garden: where it will be placed, what will be planted, and when planting will happen. Younger students use parts of the body to measure the depth of plantings or the distance between plantings. More information
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 MyiMaths  MyiMaths Ltd
A teaching resource comprised of hundreds of interactive lessons, each with dynamically generated activities, games, tools, and questions. See samples and reviews before purchasing a subscription.
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 My Magic Square  Michael Dormann
Enter a number from 23 to 100, then press the calculate button to see a completed 4x4 magic square, of which any row, column, diagonal, the center square, and the four corners each sums to the number entered.
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 My Math Games  MyMathGames.com
Online math games for elementary topics, plus the mean value theorem of calculus.
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 MyMathMind.com  Michael Graz
Online times tables learning system. Demonstration and free trial available.
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 MyMathTutor.com  Charles Patrick McKeague
A webbased eLearning resource that supplements traditional textbook and classroom learning. Before signing up for this feebased service, demo one of their RealPlayer video tutorials, which show how to solve math problems. Each lesson includes a practice
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 MY NASA DATA  NASA Langley Research Center
Webbased data, data analysis tools, and lesson plans. Mentoring and inquirY using NASA Data for Atmospheric and earth science for Teachers and Amateurs (MY NASA DATA) is a project to enable K12 teachers and students, as well as citizen scientists, to
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 My Rummy  MyRummy.com
A math card game designed to help math teachers develop their students' number sense and understanding of addition and subtraction, and also to promote reading, listening and quick decision making among the players.
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 My Schoolhouse  Educational Designers, LLC
Elementary online worksheets in math, reading, spelling, science, language, and social studies. Could be used as a curriculum outline. Subscription required; free samples available.
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 MyTestBook.com
Standardsbased tests and worksheets for grades 15. Free registration required. Worksheet generator for teachers.
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 My Virtual Reference Desk  Bob Drudge
Designed to be a onestop reference guide to all things Internet. You can search the Web, AP/Reuters, or DejaNews by keyword; find the weather by city or zip code; get stock quotes; follow links to sources of news, radio news, newspapers, TV news, magazines,
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 MyWeblets.com  Math Worksheets for Kids  MyWeblets.com
Free math worksheets for kidsboth premade and randomly generated, with optional answer key.
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 NADE Math SPIN  National Association for Developmental Education's Special Professional Interest Network for those interested in teaching mathematics
A professional organization for developmental math professionals to interact and share with each other. The site features links to best practices in developmental mathematics, newsletters, email discussion group, and conferences. Also available from
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 Naming Polygons and Polyhedra  Math Forum, Ask Dr. Math FAQ
What do you call an 11sided polygon? A 14sided polygon? Is there a list of names of polygons? What about polyhedra?
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 NASA Education  National Aeronautics and Space Administration (NASA)
The two main goals of NASA's education program are to "inspire and motivate students to pursue careers in science, technology, engineering, and mathematics" by supporting education in the Nation's schools; and to "engage the public in shaping and sharing
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