 Kangaroo Maths  Kangaroo Maths Ltd
Free maths resources to download in number, algebra, shape and space, and data handling. Assessments include homework sheets and "make the grade" tests; games and puzzles offer World Cup spreadsheet simulations. Kangaroo Maths also hosts Microsoft Word
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 Keith's Think Zone  Keith Enevoldsen
Fun math miscellany about number sets, ndimensional hyperspheres and hyperballs, big numbers, areas and volumes, angles — the revolution, shortcut arithmetic, and more. See, in particular, the brain teasers "deadly disease puzzler" and "the world's
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 Ken's Puzzle of the Week  Ken Duisenberg
A weekly puzzle for advanced high school or college level, with a math, geometry, or game focus. The problems are easy to understand but tricky to solve. An archive of previous problems and solutions is included, together with a list of other puzzle sites
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 Key Curriculum Press
Publisher of innovative texts and software applications for teaching mathematics including the Geometer's Sketchpad (dynamic geometry), Fathom (dynamic statistics), TinkerPlots (dynamic data exploration and analysis), Michael Serra's textbook Discovering
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 KeyedIn Magazine  nelsonthornes.com
Weekly puzzles, quizzes, features of great mathematicians, fun with numbers, and strategy games. An Internet quest and "the serious stuff" offer selfscoring problems. Teacher resources provide links and ideas for each chapter of the Nelson Thornes Key
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 KidsNumbers  The KidsKnowIt Network
KidsNumbers' most popular singleplayer games count down against a clock: Add It Up, Lake Mathatobie (addition), Turkey Terminator (fractions), Number Drop (basic operations set to a Tetrislike challenge), St. Pat's Math Adventure (basic operations).
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 Kids' Place Brain Teasers  Houghton Mifflin Company
Math puzzles for grades 34, 56, and 7+. You don't need to be a math whiz to solve them, just to be patient and find different ways of looking at things. New puzzles and the answer to the previous week's puzzles are posted each Thursday. Helpful hints
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 Knowledge Adventure
A developer and publisher of interactive multimedia products for kids and educators. Products include the Blaster Series (Math, Spelling, Writing, Reading), FisherPrice Ready for School, JumpStart activities for elementary grades, and Kaplan Higher Scores
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 KS3 Maths Homework Series  Stafford Burndred; Pearson Publishing (U.K.)
A series of 6 homework packs providing 180 different homework sheets covering levels 38 of the UK National Curriculum (ages 1114). Each pack addresses a separate level, and exercises use a speed marking system so that a full class can be marked in about
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 KSEG  Ilya Baran
KSEG is a Linux program for dynamically exploring Euclidean geometry. Create a construction, such as a triangle with a circumcenter; drag its vertices, and its circumcenter moves accordingly in real time. Features include a fast core to support large
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 Kungfu Math  Kungfu Interactive Pte Ltd
This online Singapore Math portal offers worksheets, quizzes, games, and more, from data analysis, geometry, measurement, mental sums, and whole numbers to algebra, distancespeedtime, fractions, heuristics questions, percentages, and ratios.
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 La Biblio
Una biblioteca de textos electrónicos. Los índices adjuntos permiten navegar por una gran diversidad de temas, todos ellos relacionados con el mundo de las Matemáticas a un nivel de bachillerato o superior. De una
recopilación
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 Launch into Math  C. Halter
A project created to further student understanding about the Internet, its resources, and the NASA Space Shuttle program. SpaceMath activities are provided for geometry (measure area and distance in space photographs); algebra (use the math that keeps
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 Álbumes Ilustrados Sobre Ciencia  Verónica Navarro
Álbumes ilustrados de geometría y arte abstracto como lo de Joan Miró, Paul Klee, y Wassily Kandinsky: La rebelión de las formas hace un itinerario por la geometría, la física, y el arte en un intento de reflexionar
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 LearnBop  LearnBop INC.
Oneonone online tutoring for students; infographic progress reports for their teachers and parents. See, in particular, LearnBop's autoscoring playlists of algebra and other math problems, which offer "ask for help" buttons and stepbystep guidance.
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 Learn.co.uk  Guardian Education Interactive Ltd.
Interactive resources for learners to support Great Britian's national curriculum. Selfguided lessons, with glossaries and selfassessments, for key stage 2, key stage 3, or key stage 4 cover numbers; shape, space, and measurement; handling data; algebra,
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 Learning by Logic: Total Surface Area (SMILE)  Carolyne Boyd, Bennett Elementary School
A lesson designed to teach students to calculate the area of plane surfaces using the formulas for the area of a square, rectangle, and triangle; develop the formula for calculating (and calculate) the total surface area of a cube and a rectangular prism;
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 Learning Epipolar Geometry  Sylvain Bougnoux
A discussion of camera angles, using demonstration applets that allow the user to manipulate lines of sight and planes of vision. With two views, things become interesting: if we know m and the projection of a point M onto a camera, its corresponding
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 Learning Math  Annenberg Media
The Annenberg Foundation and the Corporation for Public Broadcasting (CPB) use media and telecommunications to advance excellent teaching in American schools. Video programs with coordinated Web and print materials are offered for the professional development
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 Learning Wave Communications  Human Relations Media
Learning Wave is a producer of videos, CDROMs and other supplementary materials for math education including interactive games such as Absurd Math. Under the name HRM Video it has created programs such as middle school math mysteries, applicationsbased
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 Learn With Trek  NECTAR Foundation
Learn With Trek develops and markets curriculumbased mathematics software, developed by teachers, for grades K12. Each program uses engaging interactive technology to help students develop their math skills. Some products are designed as remediation
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 LearnX.com  Learning Express
Practice tests (e.g. the New York State 4th Grade Math Test) to download in PDF format; search for math or mathematics to find books to buy; browse math skillbuilding books.
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 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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