 Logical Art and the Art of Logic  Guenter AlbrechtBuehler
About pentominoes, the patterns they create, and what pentominoes have to do with Escher, Penrose, Logic, Impossible Objects, Mathematics, and Art. Download a DOS program, 'newpent.exe', that assembles (6x10) pentomino solutions manually or automatically
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 Logical Art and the Art of Logic  Guenter AlbrechtBuehler
An illustrated essay about pentominoes, flat shapes formed from five (Gr.pente = five) unit squares. Also a DOS program for pentomino solutions (6x10) and galleries of pentomino creations.
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 Logicville
Anagram, chess, cryptarithm, cryptogram, doublet, logic, mathematical, magic word square, and tangram puzzles. Select a puzzle at random; solve the puzzle of the week. Interactive puzzles require Java.
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 Lois Terms's Home Page  Rebecca S. Lindsay
"Lois lives in a condo with her mixedbreed dog, G.C.F., and a goldfish named L.C.M. She dedicates her time and efforts to the task of making the world of math understandable and exciting to middle grade students..." Lois Terms answers emailed math
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 Making Tracks towards Area  Chris, Jessie, Avie, Paul, and Luke, South Decatur JuniorSenior High School; ThinkQuest 2003
The winners of the ThinkQuest USA 2003 contest for the state of Indiana present information about finding the area of circles, triangles, squares, rectangles, and other polygons. After exploring those pages, students can test their knowledge by selecting
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 Mandelbrot Midlevels Competition
A mathematics competition that emphasizes problemsolving, geared towards students in seventh and eighth grade. Three rounds are distributed to schools throughout the year; students may participate in individual or team portions of the contest. Site
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 Manhole Covers  Stephen E. Collins, Web 66
Why are manhole covers round? Exploratory exercises.
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 The Many Ways to Construct a Triangle  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
In general, a triangle is defined by its three elements. SAS, ASA, and SSS provide three wellknown examples but there are many more. Bogomolny provides a table of constructions (linked to constructions) and invites reader contributions.
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 Mark D. Meyerson  Mathematics Dept., U.S. Naval Academy
Professor Meyerson's research interests as illustrated on his Web page include: An animated proof of the Pythagorean Theorem; Fractals (a piece of the Mandelbrot Set); finding high accuracy estimates of the "Lorenz attractor" using "continuous analytic
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 Mark's Maths and Excel Pages  Mark Dabbs
Geometry topics presented with the aid of downloadable Geometer's Sketchpad (GSP) files; see, in particular, Japanese temple geometry. Two comprehensive Tutorials in Excel spreadsheet form are provided for intermediate and advanced (VBA) users, and an
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 MAT 007 I News, Wreckreational Math  Joel Chan, Ed.; Dept. of Mathematics, Univ. of Toronto, Canada
A newsletter that combines mathematics and humour, with articles that range from the very serious and informative to the witty and hilarious. The ultimate goal of the newsletter is to bring you some enjoyment in mathematics that you might not be able
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 Match Sticks in the Summer  Ivars Peterson (MathLand)
One of the presenters at the Strens conference was mathematician Heiko Harborth of the Braunschweig Technical University in Germany. "Match sticks are [among] the cheapest and simplest objects for puzzles which can be both challenging and mathematical,"
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 Math4Mobile  Michal Yerushalmy, Arik Weizman, Zohar Shavit
Applications for use with cellular phones. Work offline and sharable. Tools include function and equation graphing tools, a dynamic geometry tool, and curve fitter. Site includes suggestions for activities.
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 Math 5337: Technology in the Geometry Classroom 
Sullivan, Burgiel, Osinga; The Geometry Center, Univ. of Minnesota
From the University of Minnesota's course in Computational Methods in Elementary Geometry, materials developed at the Geometry Center for teaching pre and
inservice teachers of highschool geometry interested in using technology in their classrooms.
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 Math Activities for Grades 912  Biezad, Ward; NASA Dryden Flight Research Center
Lesson plans based on aeronautical themes and NASA projects. Topics include: Latitude and Longitude: A Real Life Example of the Distance Formula; Graphing: The SR71: Discovering the Linear Relationship between Celsius and Fahrenheit; Battery Depletion
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 Mathansw: Math Software by Solveware  Solveware, Inc.
Math tools for people at work who need the answers to problems they encounter on the job: surveyors, navigators, managers, engineers, architects, supervisors, estimators, programmers, machinists, mold makers, teachers, college students, apprentices, home
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 mathartfun.com  Robert Fathauer
Learn and purchase products about tessellations, polyhedra, new perspectives (anamorphic art), fractals, M.C. Escher, tangrams and dissections, kaleidoscopes and symmetry, and paper folding. The gallery of mathematical art contains twisted ribbons and
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 Math Cove  C. Mawata; Dept. of Mathematics, Univ. of Tennessee at Chattanooga.
Math Cove projects include: Java applets for exploring transformations (translations, reflections, and rotations) and learning about acute and obtuse angles and other concepts in triangle geometry; more than 20 lessons for studying graph theory (using
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 Mathematical Droodles  Cut the Knot!, Alexander Bogomolny
Droodles were invented by Roger Price in 1950s. These were rather abstract drawings of few lines accompanied by an implicit question — "What is it?" A punch line — the author's answer — made the drawings obvious. A mathematical droodle is a visual object
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 Mathematical Games and Recreations  MacTutor Math History Archives
Number games, geometrical puzzles, network problems and combinatorial problems by famous mathematicians, starting around 1850 B.C. and continuing on to the present, with links to biographies of mathematicians who invented the games, pictures, and graphs.
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 Mathematical Machines  Museum of Natural Science and Scientific Instruments of the University of Modena
Models of machines based on scientific and technical literature dating back to classical Greece. Among other didactic goals, La collezione di Macchine Matematiche aims to foster reflection on the historical relationships between mathematics, society,
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 Mathematical Recreations  Advanced Reasoning Inc.
Mathematically based (not fastpaced, highaction) software games designed to provide an environment in which thinking can take place. For each game there is an associated web site that provides further information. Tangrams, Black Box, and Magic Squares:
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 Mathematical Snippets  Mathematics Dept., Bellevue Community College, Bellevue, WA
Illustrated descriptions of six mathematical concepts: the Pythagorean Theorem, Archimedes' Tombstone, the Möbius Strip, the Koch Snowflake Curve, Plateau's Problem (minimal surfaces), and Counting to Infinity. Each snippet contains a very brief
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 Mathematics Applications  Arlen Strader
Areas of mathematics for which Strader has developed Java applets: Algebra, Probability, Statistics, Set Theory, and Geometry. Statistics, developed for an undergraduate behavioral statistics class, is the most developed; algebra and geometry are aimed
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 Mathematics by Somos  Michael Somos
A mathematician at Cleveland State University and the originator of Somos Polynomials and the Somos Sequence. Brief discussions of these objects, as well as rational triangles and Pythagorean triples, may be found on this site along with links to resources
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 Mathematics for Kids  Mocomi  Ram Shengale
Freely downloadable math worksheets.
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 Mathematics in John Robinson's Symbolic Sculpture  University of Wales, Bangor
Art and mathematics are combined in this site, which explores Borromean Rings, The Möbius Band, Bernard Morin and the Brehm Model, The Projective Plane, Fibre Bundles, Knots and Links, Torus Knots, and Fractals through the work of sculptor John Robinson.
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 The Mathematics of Polyominoes  Kevin Gong
Enumerations of 2 and 3dimensional polyominoes, with lists of 2dimensional polyominoes of each size up to 24 and of 3dimensional polyominoes of each size up to 12. Also see Gong's 1991 paper, Applying Parallel Programming to the Polyomino Problem.
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 The Mathematics Shed  Robert Smith
Instructional video clips that feature rhyming narration or singing, organized into different "sheds": calculation, brain teasers, shapes, fractions, mental calculation, counting, data, measuring, visual stimulus, and more. The "Maths Story" shed offers
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 Mathematiksoftware S I und SII (vorwiegend Shareware)  Monika Schwarze
Eine Zusammenstellung nützlicher Mathematikprogramme aus dem SharewareMarkt zur Aufarbeitung von Lernrückständen, Wiederholung und Stärkung der Sicherheit mathematischer Rechenroutinen. Vor allen die Programme für die SII dienen der Überprüfung gemachter
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 Mathematische Basteleien  Juergen Koeller
A collection of puzzles: pentominoes, Rubik's cube, tangrams, magic squares, and more. Many include directions for building a physical model of the puzzle, as well as comments on solutions. Other topics include numeric palindromes and building an origami
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 Mathilla  Jelena Faletova
Primers, worksheets, and problems on arithmetic, whole numbers, fractions, geometry, and more.
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 Math Lessons  Cynthia Lanius
A variety of algebraic and geometric projects and puzzles that help students find mathematical patterns and formulas. The Million $ Mission explores exponential growth, a Fractal Geometry Unit teaches the secrets of fractals, the Mathematics of Cartography
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 Math Made Interesting  ThinkQuest 1996
Interesting interdisciplinary problems and proofs: Algebra: Chemistry, Business, Finance. Geometry: Angles, Triangles, Polygons (proofs provided). Calculus.
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 Math  Melody House  Melody House
Educational recordings, counters, sorting trays, toy coins, and other colorful manipulatives from the publishers of Jump into Math by Rae Pica, Moving To Math by Pam Schiller, Math in Minutes by Sharon McDonald, and Math All Around Me and Learning Rocks
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 Math Olympiads for Elementary and Middle Schools
An international mathematics competition for elementary and middle school students. Individual students can take one exam each month from November to March. The site includes a few sample problems and information about ordering materials and joining the
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 Math Parent Handbook: A Guide to Helping Your Child Understand Mathematics  Patsy F. Kanter
Organized into sections such as Math in the Home; Mathland: The Grocery Store; and Math on the Go. Appendices include Parents and the Schools; What Should I Expect from a Math Program? and What We Can Do To Help Our Children Learn? With activities for
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 Math  PrimaryGames.com
Games and drills for very young students: Two Minute Warning (drills addition and subtraction); One Little Ball (numbers 15); Sammy's Shapes (geometric shapes); Take It Away (subtraction); Add 'em Up (addition).
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 Math Quilts  Rebecca Chaky
A showcase for quilters inspired by mathematical themes: geometry, perspective, topology, irrational numbers, feathered star, fractals, and tessellations and tiling, including Escher. Also a link to the Math Quilts Online Bookstore, a Reference Department,
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 MathResources247.com  Ampac Enterprises, LLC
Educational math toys, games, activities, and teaching supplies such as MathSafari, Hot Dots, Math Ad Libs, overheads, geoboards, algebra tiles, balances, and play money (realistic looking coins).
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 Math Salamanders  Math Salamanders Ltd.
Free printable math worksheets, PDF flashcards, and clipart on place value with Newton the Number Newt and Flame the Place Value Salamander, basic operations with Quadra the Operations Salamander, fractions with Frazer the Fraction Salamander, and geometry
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 Maths & Numeracy Games  Keen2Learn
Increase understanding and build up speed in preparation for tests, SATs, 11+ and GCSE exams with Keen2Learn's maths and numeracy games on adding and counting, algebra, division and multiplication, fractions, numbers, percentage, shape and space, subtraction,
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 The MathSite  David Gale
Hear, see, and do the pure mathematics of polygon dissections ("Dissecting Triangles and Squares") or the applied mathematics of sorting algorithms ("Sorting Bricks and Sticks"). Requires Flash and Java plugins.
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 MathsNet: Puzzles  Bryan Dye; MathsNet
A selection of interactive mathematical puzzles of various kinds, including: the latest puzzle; Pairs; Quiz; The DAILY puzzle; The HOURLY puzzle; The MathsWalk puzzle; MathsNet Art; GraphMaze; Numeracy; Curious and interesting numbers; Numbers in words;
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 Maths Outdoors  Juliet Robertson
Blog posts from an education consultant "passionate about getting children outside." Posts on learning math outside with a kinesthetic emphasis, which date back to September, 2008, have included "Leaf Logic," "Investigating Right Angles with Sticks,"
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 Mathworld  Matt Bowling
The author developed this math story to act as a structure for the California second grade math curriculum. He finds it to be a big motivator to kids who are not usually interested in math.
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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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 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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 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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 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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