 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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 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 Advantage  Harcourt Brace School Publishers
Java and Shockwave activities (for individual or cooperative group work), sorted by grade level (K through 8); and parent/teacher features within each activities list, with further activities. The main site, the Learning Site, also offers parent and teacher
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 Math and Science: Recommended Books (Natural Math)  Maria Droujkova and Dmitri Droujkov
An annotated list of books in alphabetical order by author, selected because they are pleasant to read, have valuable math or math education content, are respectful to students, and are accessible to a broad audience. Books may be purchased online through
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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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 MathBits.com  Frederick and Donna Roberts
Devoted to offering fun, yet challenging, lessons and activities in high school/college level mathematics and computer programming to students and teachers. Includes Teacher Resources for Algebra, Geometry, Algebra 2, and Statistics; Finding Your Way
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 Math Cats  Wendy Petti
A site for children that promotes openended and playful explorations of important math concepts, and more serious reflection on topics such as Hurricane Katrina. Start with the magic chalkboard, then enter Math Cats MicroWorlds (interactive projects);
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 Math Central/Math Centrale  University of Regina, Regina, Saskatchewan, Canada
For K12 math education: a teacher resource room, a bulletin board, a questionandanswer service, and Teacher Talk, an email discussion forum. Teachers are encouraged to send resources and suggestions. Math Central is maintained by faculty and students
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 Math.com
Links to Internet math resources for students, teachers, and others, and to products from the Math.com store. Solutions include assessment, ondemand modular courses that target key math concepts, 24/7 live online tutoring, and expert answers to math
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 MATH Connections: A Secondary Mathematics Core Curriculum  Mathconx, LLC
A secondary math core curriculum that blends algebra, geometry, trigonometry, statistics, probability, and discrete mathematics to emphasize the interconnectedness among mathematical ideas. It incorporates graphing calculators and computers to solve real
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 MATHCOUNTS  MATHCOUNTS Foundation
A national math coaching and competition program that promotes 7th and 8th grade math achievement through grassroots involvement in every U.S. state and several territories. At the beginning of each school year, the MATHCOUNTS Foundation distributes,
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 Math Course Reviews  Mathematics Dept., Triton College, River Grove, IL
Math course reviews for courses given at Triton College: Whole Numbers; Fractions and Decimals; Algebra I; Geometry; Algebra II; College Algebra; Trigonometry; Finite Math; Calculus I and II; Business Calculus; Calculus III; and Elementary Statistics.
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 Math Craft  Cory Poole, administrator
A community "dedicated to the exploration of mathematically inspired art and architecture through projects, community submissions, and inspirational posts." Share images, videos, and other resources on the corkboard; post questions to the forum. The blog
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 MathDEN: Mathematics Resource for the Home and Classroom  ACT360 Media Ltd.
To explore this site, use guest as username and password. MathDEN presents a new set of competitionlevel questions every Thursday. From the MathDEN homepage, click on the Stage that best matches your math abilities: Stage 1 (Grades 78); Stage 2 (Grades
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 Math Department Problem Sets  Phillips Exeter Academy, Exeter NH
Six problem sets, with glossaries, by the Phillips Exeter Mathematics Department. See also a description and student testimonial of the Harkness method.
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 A Mathematical Canvas  Kirby Urner
Urner's statements on his approach to curriculum writing and philosophy of education, as well as articles: "On Programming the Calculator," "Alien Curriculum," and "Python for Homeschoolers @ FreeGeek." Download 4D "Moodles" of courseware such as Geonumeracy
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 Mathematical Ideas in Science  Seven Stones Multimedia
A series of tutorial modules using JavaScript, Shockwave for Director, or Shockwave Flash: sphere packings, shapes and lattices; waves described, longitudinal and transverse wave lab, 2dimensional harmonic disturbance; 2dimensional vector components
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 Mathematical Models for the Classroom  Foster Manufacturing Company
Manipulatives handcrafted for use in the furthering of mathematics education. The catalog of wood products includes solids generated by crosssections on a circular base, solids of revolution (to illustrate integration by cylindrical shells, by washers,
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 Mathematical Presentations and Articles  James Taylor, Moriah College, Australia
A growing collection of PowerPoint presentations and articles written by James Taylor, of Moriah College in Australia. Preview or buy the three presentations (on the topics of conics, polyhedra, and volume); or read articles on Cantor triangles, the Clepsydra,
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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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 Mathematical Visualization  David Banks, ICASE
Interacting With Surfaces in 4D Illustrations of: Torus Rotating in R4; Steiner Surface showing triple point; Crosscap; Striped Crosscap; Double Crosscap; Klein Bottle containing Möbius band; Sudanese Surface: Möbius band w/ circular boundary;
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 Mathematics and Multimedia  Guillermo Bautista
Blog about mathematics, teaching, learning, and technology. Begun in October, 2009, it has included posts such as "GeoGebra Tutorial 4  Graphs and Sliders"; "Screencasting Tutorial: Making a Math Video Lesson Using Camstudio"; "Derivative in Real Life
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 Mathematics Animated  Louis A. Talman, Dept. of Mathematical & Computer Sciences, Metropolitan State College of Denver
QuickTime animations to run or download: The Sine Curve; An Ellipse; An Elliptic Reflector; A Parabolic Reflector; The Moving Secant Line; Measuring Slope and Plotting the Derivative; The Cycloid; An Epicycloid; A Hypocycloid; A Simple Polar Area Problem;
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 Mathematics  Cornell Theory Center Math and Science Gateway
For secondary school students and educators. Links for general topics; geometry; fractals; history of mathematics; tables, constants & definitions; and mathematics software.
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 Mathematics Education Partnership Program (MEPP)  National Security Agency (NSA)
Collected learning units/lesson plans for elementary school (arithmetic, data analysis, fractions, geometry, probability/patterns); middle school (prealgebra, algebra/graphing/statistics, geometry, number theory, interdisciplinary); and high school (prealgebra,
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 Mathematics Enhancement Programme  Centre for Innovation in Mathematics Teaching, Univ. of Exeter, U.K.
A whole curriculumlessons, worksheets, overhead projector transparencies, teacher notes, practice problems and examsfor primary and secondary schools. Use the Mathematics Attainment Test to generate tests online, automatically mark and detect common
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 Mathematics Graphics Gallery  Xah Lee
A collection of mathematical images. Links to files on Xah Lee's sites that contain attractive mathematics graphics: Nested Inversion of Circles; Conic Sections; Epicycloid and Hypocycloids; Rose Curves; wallpaper designs; Transformation of the Plane;
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 Mathematics Illuminated  Annenberg Media
A video course for adult learners, high school and college teachers; 13 halfhour video programs, online text, course guide, and Web site; graduate credit available. "Rather than a series of problems to be solved, mathematics is presented as play we engage
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 Mathematics in Context  Jennifer Schwartz, Encyclopaedia Britannica, Inc.
A subscription program for students grades 58 that applies mathematics in the context of engaging, reallife problems following the recommendations of the NCTM Standards. Developed by the Wisconsin Center for Educational Research, School of Education,
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 Mathematics  John Savard
A collection of essays and illustrations: pentagonal tilings, infinity (Cantor's theory of transfinite numbers), rotations of the dodecahedron, Archimedean solids, the fourth dimension (regular polytopes), Gödel's proof and the halting problem, and
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 Mathematics Learning
A publishing company offering researchbased activity books, games, and software for grades preK8.
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 Mathematics Meetings Feature Proof of Dodecahedral Conjecture by Undergraduate Sean McLaughlin (Math Chat)  Frank Morgan, MAA Online
The Dodecahedral Conjecture says a very symmetric conjectured arrangement, based on the regular 12faced dodecahedron, it is the optimal arrangement locally to pack unit balls around one fixed ball. This conjecture has now been proved, by Hales's undergraduate
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 Mathematics Software  SAS inSchool
Standardslinked, interactive software for 3D geometry, conics, graphing linear equations, and polygons. Includes background materials, teacher's guide, and Web links. Oneminute Real Player demos available. For Windows PCs only.
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 Mathematics (SparkNotes.com)  WebCT.com & iTurf Inc.
Over 100 guides for mathematics ranging from prealgebra topics to advanced work in calculus, written by students and recent graduates of Harvard University. The site also includes message boards for beginner, high school, and advanced math, calculus,
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 Mathematics Teacher: Geometry Bibliography  Hubert Ludwig
Hubert Ludwig, a math professor at Ball State University, has compiled an index of all the geometryrelated articles that appeared in the Mathematics Teacher through 1996. This page provides the index of the archive, with links to the documents in the
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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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 Math Engine  MathEngine plc
MathEngine is a provider of natural behavior technology for 3D applications and simulations. MathEngine's core product is a software toolset for modeling and adding physicsbased behavior into interactive 3D graphics applications. Products include the
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 Math Explorers' Club  Cornell Department of Mathematics
Selfcontained modules of activities and other materials for middle and high school teachers to give their students experience with more advanced topics in mathematics, such as combinatorics and cryptology, graph theory, probability and applications,
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 Math for Morons Like Us  ThinkQuest 1998
Students talk to students about math: a site designed to help you understand math concepts better. Tutorials, sample problems, and quizzes for PreAlgebra, Algebra, Geometry, Algebra II, and PreCalc/Calculus, designed assuming you know some of the basic
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 MATHGYM Mathematics Training Programme  Paul Dooley
A tutorial from Australia designed to help 1016yearolds develop mathematical problemsolving ability, with five SETs of 20 problems typical to many math competitions. Students are given a Training Problem to solve, with necessary background theory,
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 Math Help from YourTeacher.com  Classmate, L.L.C.
YourTeacher offers interactive online math instruction with 450+ math lessons (PreAlgebra, Algebra 1, Geometry & Algebra 2). Includes teacher videos, animated examples, selftests, printable extra problems & notes. Monthly subscription price; free demo
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 Math Homework Help
Email contact for homework help in prealgebra, algebra I and II, college algebra, geometry, trigonometry, precalculus, and calculus. Site also contains a math history timeline; math dictionary; some basic differentiation and integration rules; trigonometric
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 Math in Motion: Origami in the Classroom, K8  Barbara Pearl
Workshops and a book which use an interdisciplinary and manipulativebased approach to teaching mathematics, supporting the Common Core State Standards for Mathematics (CCSSM) and unfolding a positive attitude toward math and learning. Barbara Pearl developed
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 Math in the Mall  Dubiel, Heinrich; Simon Fraser University
Popularizing mathematics through displays with handson activities. A page describing the creation and display of mathematical projects in malls. Information included about successful projects (kaleidocycles and hexaflexagons, Platonic solids, drinking
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 The Math League  Conrad, Flegler, Motyka; Math League Multimedia
Math contests for grades 4 through 12, contest problem books, and math educational software for grades 48. Contest results from math league competitions in the U.S. and Canada are posted here.
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 Mathletic
A Mathematics and Puzzles resource. Under mathematics there are sections on planes, solids, conversions, Greek letters, constants, and integration. Puzzles offered, with clues and answers, include: Add it Up; Seesaw; Cheque it out; Coins; Crop Circle;
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 Math Listings (Online Schoolyard)  Comcast Online Communications
Links to selected math sites in the following categories: About Math in the Real World; Add, Subtract, Multiply and Divide; Algebra Avenue; Counting Corner; General Topics; Geometry; History of Mathematics; Measurements; PreCalculus/Calculus; Probability/Statistics/
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 MathMagic on the Web  Alan A. Hodson; The Math Forum
MathMagic was a K12 telecommunications project developed in El Paso, Texas. The intent of the project was to provide motivation for students to use computer technology while increasing problemsolving strategies and communications skills. MathMagic posted
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 Math Meet  Alex Kasman
Samples of the Annual College of Charleston Math Meet include PDFs of recent written tests; "AllDay Sprints" such as coded quotes, scramble, polymath, grids sprint, and "Blatant Propaganda Sprint"; math team relay; math brainstorm; and "marathons" 
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 MathMol  NYU/ACF Scientific Visualization Laboratory
A starting point for those interested in molecular modeling, one of the fastest growing fields in science, from building and visualizing molecules to performing complex calculations on molecular systems. Using molecular modeling scientists will be better
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