 Leigh Nataro  YouTube  Leigh Nataro
Brief narrated screencasts for algebra, geometry, AP Statistics, and other high school math subjects, often using Fathom software and TINSpire technology.
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 Leone Learning Systems  TJ Leone, Leone Learning Systems, Inc.
Online courses for kids anywhere, and local teaching and tutoring services for students in Chicago and the Northern Suburbs of Chicagoland. LLS provides a free geometry software package for children age six and up, and free resources for teachers and
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 Les Hexamys  Raymond Pouzergues
Les Hexagrammes Mystiques de Pascal: a theorem with which one can make almost all the problems of geometry. In French.
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 Le site des maths à petites doses  SaintMartin Arnaud
Supplementary information and explanations of various mathematical topics, often illustrated with figures and JavaScript, as well as some sample problems and multiplechoice quizzes. In French.
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 Les Mathématiques  Gilles G. Jobin, Projet Diderot
Web resources, activities, lessons and tutorials for secondarylevel mathematics. Illustrated geometry theorems, with extensive use of the software package the Geometer's Sketchpad. Puzzles and games; algebra problems and adult education. Activités:
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 LessonSketch  The Regents of the University of Michigan
A suite of animated sketches of geometry and algebra instruction, and forum for ongoing conversations about mathematics instruction, for practicebased professional development of secondary mathematics teachers. LessonSketch "supports the creation, examination,
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 LessonSnips  LessonSnips
Free lesson plans, worksheets, and activities.
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 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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 Library of Math  David A. Smith
Definitions, comments, examples, propositions, and proofs on Business Algebra, Business Calculus, Calculus I, Calculus III, Euclidean Geometry, Financial Mathematics, Group Theory, and Trigonometry. The Library of Math website was designed to be a "browserquiet"
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 Library Video Company
Library Video Company offers a searchable, browseable catalog of video and CDROM products for mathematics instruction on the K12 level, from addition to variables. This resource for primary and high school math educators looking for curriculum enhancers
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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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 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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 LiveMath  Theorist Interactive, LLC
WebShareable computer algebra and graphing software (formerly MathView/Expressionist / Theorist / MathPlus). LiveMath notebooks may be shared via the Web. They are similar to spreadsheets in that a change in one value will ripple throughout the calculations.
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 l'île des mathématiques  Tom Pascal
"L'île des mathématiques propose des cours et des exercices de maths et de
physique.
Il est possible de télécharger les nombreuses fiches.
Aussi bien pour les élèves que pour les professeurs de collège et de lycée.
Des forums gratuits d'entraide sont
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 The Logic Puzzle Museum
Play with more than fifty different handson brain twisters, mechanical and logic puzzles  and craft your own. Regular events at this Burlington, Wisconsin, museum include Valentine's Day (makeyourown historic rebus valentines), celebrations of the
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 The Logo Foundation
A nonprofit educational organization devoted to informing people about Logo and supporting them in their use of Logobased software and learning environments. The site includes links for workshops and seminars; books and videos; Logo software (at discount
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 Logo in Mathematics Education  Don Beaty
Sections introducting Logo and its use in the classroom, as well as Illinois Learning Goals (state standards), and a series of juniorhigh level lessons aligned to those standards.
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 Logotron Educational Software
A U.K.based division of Addison Wesley Longman, Logotron publishes educational software for schools in numerous subjects, including mathematics, datahandling, multimedia, internet, earlylearning, and crosscurriculum. All are tied to key stages where
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 A Look at LOGO: MicroWorlds Pro  Jordan, Alex, Josh, Rex; ThinkQuest 2003
Sixth grade students Jordan, Alex, Jonah, and Rex draw on MicroWorlds Pro to learn to solve problems, use geometry, and think critically. Their site includes two lesson plans and several activities using MicroWorlds Pro, and some information on real turtles
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 Los Elementos de Euclides  Jaume Domenech
Euclid's Elements translated into German, Portuguese, Arabic, Italian, Catalan, Russian, and Chinese. With definitions and illustrative applets.
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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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 M2C: Maricopa Mathematics Consortium  Alan Jacobs, Project Director
A Consortium for creating mathematics programs in which students learn the knowledge, skills, principles, and applications they can use throughout life to become smarter employees, consumers, citizens, and learners; and to build a coalition of schools
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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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 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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 Magic Geometry Workshop  Shigehisa Sekie
A shareware geometry program for Win95/98/2000/XP. Sample interactive geometric constructions available on site.
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 Magic Math Kingdom  Nippon Educational Software Laboratory
Magic Math Kingdom is math game software, in which kids solve elementary math problems in order to rescue a frog princess. Also available is the Internet Geometry Education Tool OMAIL. With OMAIL, students can learn geometry by manipulating lines or
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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 Math More  Make Math More, LLC.
Activities, lesson plans, extensions, teacher guides, student worksheets, and other materials created and sold by a Cleveland middle school teacher to engage his students by making math relevant to their lives: "Probability of Rock Paper Scissors"; "Creating
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 Making Mathematicians  Holly Young
Lessons, activities, book recommendations, and more from a Nevada educator who provides professional development on the "ACE" method (Answer the question; Cite details, show computation; Explain all steps) of answering constructed response questions.
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 Making Mathematics  O'Reilly Media, Inc.
Learn mathematics by making math with Hilbert, an online version of Mathematica. The Making Mathematics syllabus and course platform presents students with computational examples to explore  and challenges them to create their own.
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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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 Mamikon  Mamikon Mnatsakanian
Thoughtprovoking Shockwave Flash animations of geometric constructions, graphs, games, and much more. Mnatsakanian's site http://www.mamikon.com/ links to dozens of the articles he has coauthored with Tom Apostol in journals such as American Mathematical
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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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 Mangahigh.com Math Games  Blue Duck Education Ltd
A gamesbased math learning environment built around the UK's national curriculum. Mangahigh.com's online quiz game, Prodigi, adaptively coaches students aged 1016 with worked examples, full hints, and solutions. Other interactive games include "Save
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 Manipula Math with Java  International Education Software (IES)
Hundreds of interactive Java applets for middle school through early college years on subjects such as geometry, calculus, trigonometry, linear transformations, vectors, complex numbers, and conics. Applets and animations often include introductions to
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 The Map is Not the Territory  Malke Rosenfeld
Blog by a traditional percussive dancer (Appalachian style flatfooting and clogging and Canadian step dancing) who "teaches the math that directly relates to the process of making rhythm and patterns with the feet." Posts about the mathematics of percussive
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 A Map to Calculus  Donald Cohen
This clickable flowchart uses student works and sample problems to reveal the connections between graphs, functions, iteration, cookiesharing, solving equations, compound interest, snowflake curves, and geometry as it builds up to infinite sequences,
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 Marius Kempe
Kempe's activities consist of photos of a manipulative or geometric drawing, each captioned with brief instructions and a question. "Writing" includes a guide to the errata for Weyl's Symmetry; as well as translations of Pólya's "On the analog
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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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 Matemática? Absolutamente!  Paulo Correia
Página de Matemática do professor Paulo Correia. Contém Recursos e
Materiais para o Ensino Secundário e ainda Humor e Curiosidades.
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 Matemáticas básicos para niños  J. A. Cordero
La resolución de problemas, no solo de ejercicios, es la parte fundamental del aprendizaje de las matemáticas básicas. Los problemas implican una pregunta que no se sabe responder con los conocimientos inmediatamente disponibles.
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 Matemática Sem Palavras  Jorge Picado et al.
Diagramas visuais (Java) que conduzem à descoberta de áreas, multiplicação, equações completas de segundo grau, somas com um numero finito de parcelas, somas com um numero infinito de parcelas, desigualdades,
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 Matemática Virtual  Mariam del Mar Correa
Página dedicada a las matemáticas donde puedes encontrar consejos para superar el miedo a las matemáticas, estrategias para resolver problemas, fórmulas, cultura matemática y test de inteligencia.
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 Materials for Math Teaching  Antonija Horvatek
Antonija Horvatek, a math teacher in Croatia, offers her Geometer's Sketchpad (.gsp) files and Power Point (.ppt) files that explain: fractions, decimal numbers, integers, rational numbers, equations, functions, perimeter and area, plane transformations,
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 Materials for using projector in math teaching  Antonija Horvatek
Geometer's Sketchpad and PowerPoint files for presenting fractions, decimals, integers, rational numbers, equations, functions, perimeter and area, plane transformations, the Pythagorean Theorem, threedimensional geometry, and statistics. Also available
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 Math2.org (formerly Dave's Math Tables)  David Manura
A collection of useful searchable math reference tables, formatted especially for the Web. Tables cover topics in general math (number notation), algebra (identities, polynomials, exponents, etc.), geometry (areas, volumes, surface areas), trigonometry
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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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