 Let's Play Math!  Denise Gaskins
"As a homeschool mom who loves math, I want to help other homeschoolers see the variety and richness of the subject.... I hope this blog will be a place where we can play around with ideas about learning, teaching, and understanding math. (For me, it
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 A Level Mathematics Resource Site  Frederick Koh
Solved problem sets, summary handouts, and examination advice for A level Math students from a tutor with twelve years of teaching experience.
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 Lewis Carroll's Logic Game  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Discussion of an invention of Lewis Carroll's that competes with Venn diagrams for solving logical problems. Topics include the bilateral and trilateral diagrams, syllogisms, two Java applets, sample soriteses, and Carroll's Game of Logic.
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 The Lial/Hornsby Algebra Series Web Site  Addison Wesley Longman, Inc.
A site supporting the Lial/Hornsby Algebra series with additional practice, quizzes, tutorials, exercises, and information about the textbook supplements. For every chapter of each textbook, the site provides a glossary; InterAct plugin tutorial exercises;
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 Liars and Truthtellers  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
A princess visits an island inhabited by two tribes. Members of one tribe always tell the truth, and members of the other tribe always lie. What question should the princess ask the natives to find out the right road to take?
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 The Lighter Side of Dr. Paulsen  William Paulsen
A collection of online games and puzzles: blackjack, The NonZero Difference Game, No Alibi (a mystery detective game), a haunted mansion labyrinth, sliding tile puzzles, and The Prime Maze.
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 Lightning Reflex  Jason Lowe
Online math competitioncompete with people from all over the world. Every month features a different
area, such as timestables or addition. Requires Flash 6 or higher.
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 Linear Algebra for Informatics  José FigueroaO'Farrill
Lecture notes and tutorial problems for the Linear Algebra module in Mathematics for Informatics 3 (MAT2mi3/am3i), a course at the University of Edinburgh. Divided into three parts: real vector spaces and their linear maps, subspaces, linear (in)dependence,
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 Linear Algebra  Jim Hartman, The College of Wooster
A course outline featuring a timeline of developments in linear algebra and notes on change of basis; a QuickTime movie illustrating linear transformation; definitions and "facts" (many of the theorems, lemmas and propositions that one encounters in a
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 Linear Algebra  Tamara Anthony Carter, Richard A. Tapia, and Anne Papakonstantinou
An introduction to linear algebra for precalculus students, with problems and answers. Topics include matrices, determinants, consistent and inconsistent systems, Markov chains, least squares approximation, eigenvalues and eigenvectors, and numerical
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 Linear Algebra Toolkit  Przemyslaw Bogacki; Old Dominion University, Norfolk, VA
A Web "toolkit" intended to help a student of linear algebra to learn and practice a basic linear algebra procedure, such as GaussJordan reduction, calculating the determinant, or checking for linear independence. Includes systems of linear equations
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 Linear Methods of Applied Mathematics  Evans M. Harrell II and James V. Herod
An online textbook suitable for a first course on partial differential equations, Fourier series and special functions, and integral equations. Organized into nineteen chapters: Linearity, The geometry of functions, Fourier series, Calculating Fourier
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 Lines, Circles and Beyond  Cut the Knot!, Alexander Bogomolny
Third in a series of columns that draw on Frank Morley's fundamental paper On the Metric Geometry of the Plane nLine. Bogomolny's initial intention was to expose the simplicity of and the motivation behind Morley's original proof of his famous theorem.
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 The Little Math Puzzle/Le Petit Problème  Royal West Academy and Canada's SchoolNet
Weekly puzzles posted to Canada's SchoolNet Listserv, intended to be an Internet icebreaker activity for a wide range of classrooms. Inspired by The Great Canadian Trivia Contest, these puzzles are designed for students in grades 5 through 10 and usually
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 Living Maths HQ  Living Maths
Begun in 1995, this math olympiad has grown from a syllabus for one bright young student into a weekly challenge for thousands of South African learners.
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 L'île des mathématiques
Cours de mathématiques, tous niveaux: fiches à télécharger.
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 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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 Logic Puzzles  Erich's Puzzle Palace; Erich Friedman
Five logic puzzles: "Tweedledum and Tweedledee look alike, but Tweedledum lies on Monday, Tuesday, and Wednesday, whereas Tweedledee lies on Thursday, Friday, and Saturday. They both tell the truth on Sunday. You come upon the two of them, and they make
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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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 The Logic Zone
A collection of logic problems with answers, logic puzzles, and cryptograms.
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 Losing Each Mile But Winning the Marathon (Math Chat)  Frank Morgan, MAA Online
Joan was entered to run a special 26.5mile marathon, and she hoped to average under nine minutes per mile over the total distance. She had a number of friends measure her time over various mile segments of the course, and for each possible mile that
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 Lsquared  Laura Shears
Educational Flash and other software to "help facilitate both necessary basic skills as well as play to figure out concepts" so that students "learn how to think about math instead of memorizing procedures": algebra, arithmetic, art, demonstration tools
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 Lure of the Labyrinth  Learning Games to Go (LG2G)
In this free online adventure game, middleschool prealgebra students rescue their pets, combat mysterious monsters, and embark on whimsical math missions to gain a better understanding of proportions, fractions, and ratios, variables and equations,
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 M^3 (Making Math Meaningful)  Mary Bourassa
Blog by the Director of Ontario Association for Mathematics Education (OAME). Posts by this winner of the NCTM Future Leaders Award date back to April, 2013, and have included "Parabolic Art," "Day 7," "Completing the Square with Algebra Tiles," "MFM2P
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 M4Maths.com
Tricks, discussion groups, short puzzles, and answers. Subscribe to receive the daily puzzle; solve it fastest for a chance to win prizes.
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 MAA Partnerships Physics and Mathematics Information Page  Robert Styer
The Mathematical Association of America's (MAA's) Partnerships program runs a series of workshops that build crossdisciplinary partnerships and create interdisciplinary teaching materials. A Partnerships workshop for faculty in Physics and Mathematics
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 Macalester College Problem of the Week  Stan Wagon; The Math Forum
Stan Wagon, a professor in the Mathematics and Computer Science Department at Macalester College, poses a mathematics problem to his students every week. The problems are meant to be accessible to firstyear college students, so very little background
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 Mad Math Minutes  Harry Bogucki
A Javabased arithmetic practice page that allows you to specify the type of problem, numbers involved, and number of problems assigned, and check your answers.
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 Mad Maths  Philippe Chevanne
Word problems, with short solutions and "details" that reveal steps in solving number theory, logic, geometry, and more. Scripts include original JavaScript about continued fractions, Apollonius circles, Pythagorean triples, decompositions of sums of
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 Magic Cards  Chunsheng Ban
You see four cards, each with eight numbers. Think of a number from 1 to 15; Check ALL the boxes below the cards that contain your number; Click on the button "What's My Number?"; Your number will be displayed on the screen. Based on an exercise in a
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 The Magic Hexagon  Frank R. Kschischang
A diameter5 magic hexagon. Each integer from 1 to 19 appears exactly once, and the sum of the numbers along any column or diagonal is the same.
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 The MagicMazes at CONK! Hard Maze  Don Dodson
Mazes randomly generated on the fly for you to print out and solve. Reloading the page instantly produces a new maze. An easier maze is also available.
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 Magic Square Puzzle  Dubi Kaufmann
In this Shockwave activity, the goal is to arrange jigsaw puzzle pieces numbered 0 through 15 on a four by four grid so that the sum of each row and column is equal to 30. Explorer preferred.
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 Magic Squares  Alan W. Grogono
The Magic Carpet approach to understanding magic squares. Underlying many of the small sized panmagic squares there is the simplest of patterns  best likened to a magic carpet  which can be endlessly repeated in all directions and can be sampled to
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 Magic Squares, Magic Stars & Other Patterns  Harvey Heinz
A large collection of material on magic squares, cubes, hypercubes, stars, and other 'magic' objects. Also pages on other number patterns. The purpose of this site is to show that mathematics can be fun. Subjects demonstrated include algebra, patterns,
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 Magic Squares  Mark S. Farrar
Pages about Magic Squares, much of the information from Farrar's book. Contents include: What Is A Magic Square?; History; Magic Total; Odd Magic Squares; 4 x 4 Magic Squares; Unusual Magic Squares; References; Magic Square Links; Magic Square Photographs.
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 Magic Squares  Mutsumi Suzuki
Information about magic squares, organized into the following categories: Database, Algorithms, Mathematical Background, Story and/or History, Links, Related Topics, Photographs, Email, Literature. The magic squares pages, currently hosted by the Math
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 Magische Quadrate  Holger Danielsson
History, definitions, magic sums, transformations, properties, and more. Danielsson provides Flash that uses Hendricks' method to construct your own magic squares: odd, even, doubleeven, singleeven, composite, concentric, mostperfect, bimagic, pandiagonals,
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 Magnus: A System for Exploring Infinite Groups  New York Group Theory Cooperative, CCNY
A free, intuitive, graphically driven objectoriented package for computational group theory, exploring infinite groups. From the New York Group Theory Cooperative at CCNY, which also provides links to an archive of preprints and open problems in combinatorial
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 Magooey's Math Problems Website  Irving Magoo, Magooey's Enterprises
Calculus problems and solutions for students who want extra practice. Currently covers differential calculus; will expand in near future. Power of calculus is demonstrated by proof of statements such as the Arithmetic Mean  Geometric Mean Inequality.
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 Mag's 3x3 Rubik's Cube Solution  Tom Magliery
A small collection of operations for the 3x3 Rubik's Cube, which assumes that you already know how to get one entire face solved; this means not only having all of one color on one side, but also having those 8 pieces in the proper position with respect
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 Maisonet Math  Shane Maisonet
This website provides math worksheets in pdf form for public download. Online quizzes also provide instant feedback to indicate level of mastery. Online videos of various math concepts are also available.
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 Make a Conjecture: Cardiac Output, Rates of Change and Accumulation (iMath Investigations)  Illuminations; National Council of Teachers of Mathematics (NCTM)
An online, interactive, multimedia math investigation. This activity explores the measurement of the amount of blood being pumped by a heart. The goal of this iMath investigation is a rich exploration of concentrations (mixture problems), rates of change
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 Make It Real Learning Company  Frank Wilson
The Make It Real Learning library features more than 100 math worksheets focused specifically on answering the question, "When am I ever going to use this?" The site addresses math topics ranging from fraction addition to partial derivatives. Their free
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 Making a Better Calendar (Math Chat)  Frank Morgan; Christian Science Monitor
Our current calendar divides the 365day year into 12 months, or 52 weeks plus one extra day. Find a better calendar system. For example, are 7day weeks best? Is there any way to avoid needing a new calendar every year?
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 Making Math Fun  Robert Greenlee
Sample a hundred different math games, worksheets, PowerPoints, and teacher resources in PDF format from the collection of 700 that Robert Greenlee sells as a CD.
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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 Competition  Greater Testing Concepts
A roundbyround math contest in the United States, the goal of which is to introduce high school students of all ability levels to accessible new topics in mathematics while providing stimulating, challenging problems. The team test portion of the contest
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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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 Maple worksheets  Ben Pollina; Dept. of Mathematics, Univ. of Hartford, Hartford, CT
Maple worksheets for linear algebra and discrete math courses (introduction to Maple, linear systems, matrices, determinants, and logic).
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