 MATHguide  Mark Karadimos
A mathematics resource bank for students, parents and teachers, with puzzles (you may email your answers), links to articles about educational issues, terminology, help, projects, lesson plans (with interactive quizzes, and chat boards.
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 Math Help: Exercises and Activities  Syvum
Online quizzes, tutorials, and games. Syvum also sells educational software.
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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 Help  Graeme McRae
Tips and techniques for math students from sixth grade through high school, and oneonone help for math students in a variety of formats. Also includes math puzzles and jokes.
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 math hombre  John Golden
Golden, a math professor at Grand Valley State University (Michigan), blogs to "share my math interests on the web, post new materials for elementary, secondary and teacher ed, and vent mathematical steam when needed." Posts, which date back to April,
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 Mathigon  Philipp Legner
A collection of educational resources designed to show children, the general public, and teachers "how exciting and entertaining mathematics can be." Interactive eBooks, slideshows, videos, animations, lesson plans include World of Mathematics, Journey
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 Mathilla  Jelena Faletova
Primers, worksheets, and problems on arithmetic, whole numbers, fractions, geometry, and more.
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 Math Is Everywhere: A Problem Solving Teaching Unit  Joseph A. Montagna; YaleNew Haven Teachers Institute
A discussion of a variety of strategies for math problem solving, with examples of how to use them and why the development of problemsolving skills is important. The unit is accompanied by a kit of materials available through the YaleNew Haven Teachers
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 Math Is Everywhere!  Franklin Northwest Supervisory Union
Problems of the day, reflections on workshops, and other blog posts. This partnership of the Franklin Northwest Supervisory Union and the Vermont Math Initiative aims to obtain community support for STEM and expose students to STEM careers.
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 Math Kangaroo  Maria Omelanczuk
Math Kangaroo's international "notselective competition" recognizes all students who participate in its 75 minutelong multiple choice test: "Each participant is seen as a winner and receives recognition and gifts on the test day in March." Open to any
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 Mathkinz
Free printable math worksheets for home and school use, early grades through middle school, with links to math games and online quizzes.
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 MathLand Archives: MAA Online  Ivars Peterson
A searchable archive of weekly mathematics columns by Ivars Peterson, the mathematics and physics writer at Science News, hosted on the Web by the Mathematical Association of America.
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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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 Math Lessons in PowerPoint: Algebra 1, Geometry, Algebra 2  Simon Perez
Download PowerPoint presentations from Perez's bilingual classes on topics in geometry, algebra I, algebra II, and CAHSEE (basic math preparation). Some of the topics also feature online quizzes; written compositions and posters by students; and digital
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 The Math Less Traveled  Brent Yorgey
A blog "dedicated to exploring beautiful mathematics." Posts, which date back to March, 2006, have included "Proof by animation," "The Nuclear Pennies Game," "Recounting the Rationals," "Predicting Pi," "Square roots with pencil and paper," "Irrationality
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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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 Mathletics (Question Mark Perception)  Martin Greenhow; Brunel and Portsmouth Universities, UK
Submit answers, and receive automated evaluations with comments, on arithmetic, fractions and percentages, algebra diagnostic tests (GCSE level); elementary probability and statistics; complex numbers and number bases other than 10; handling brackets,
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 Math Limericks  James E. Garner
Mathematical limericks.
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 MathLinks Math Forum  Valentin Vornicu
An online math olympiad community, organized into levels  from middle school to "College Playground"  and national and local communities. Discuss thousands of problems on the bulletin boards, or post your own with HTML and LaTeX.
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 Math Logic Project Page  Mary Lee Malen; The Levering School, Philadelphia, PA
A project plan, summary reports, content and results are included for concept puzzles in logic and math, involving teamwork, handson activities, and the Web, as well as standards addressed, a hotlist of Web resources, and pictures of students. Toothpick
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 Math.ly
Multiple choice arithmetic, algebra, and calculus questions. Click the correct answer, and it instantly highlights in green; incorrect, in red. Adjust the difficulty of questions, rendered in MathJax, with the slider bar.
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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 Magic  Erich Friedman
A site devoted to original mathematical recreations. If you have a math puzzle,
discovery, or observation, you are invited to email the author. You can also submit answers to the problem of the month; questions and solutions are archived. Examples include:
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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 Manips  Testing Data Services
Math Manips is an online teaching and assessment system. Practice math abilities by using the "try" mode, or record them for a teacher using the "test" mode. Sample their interactive Flash manipulatives: Addition, Subtraction, Counting Cars, Timing Stoplights,
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 MathMastery  MathMastery.com
Play CyberChallenge Shockwave addition, subtraction, multiplication, and division games. Test Your Skills with placement exams (online or printable) on adding, subtracting, multiplying, dividing, fractions, and decimals. My Math Class offers Shockwave
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 Mathémathiques au Collège  Jerome Burgard
Site pédagogique qui propose des cours de maths complets pour les élèves de niveau collège ainsi qu'un lexique des notions essentielles de mathématiques qui permet de rattacher facilement chaque chapitre du programmes
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 Math Matters, Inc.  Math Matters, Inc.
Math Matters, Inc. publishes a monthly newsletter ($20/year) with math games and puzzles for elementary school teachers. For a free newsletter or a free math game with an initial order email jhi8842748@aol.com.
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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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 Math Mentor Take the Test  Santa Clara County Office of Education
For students preparing to take the California High School Exit Examination (CAHSEE) in math: answer a sample question on your own; watch a math mentor solve the same problem; and review a stepbystep solution. The movies of Englishspeaking and Spanishspeaking
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 Math Misery?  Manan Shah
Blog that "aims to convey the general feeling that the majority of people have when it comes to working with mathematics... and bring awareness about what mathematics is and what mathematicians do." Posts, which date back to May, 2013, have included "Figuring
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 Math Mom's Home Page  Rukmini Sriranganthan
A Javascript multiplication flash card program.
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 Math Movement  Tim Chartier
Blog that focuses on mathematics and the "progress or movement" that occurs in Chartier's teaching, research, writing, and performing. An Associate Professor of Mathematics at Davidson College, Chartier has trained at Le Centre du Silence mime school
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 MathMovesU  Raytheon Company
Raytheon's national initiative for promoting math in the middle grades. See how math "moves" celebrities such as Olympic speed skater Apolo Ohno; pro football player Willie McGinest; soccer player Mia Hamm; BMX biker Dave Mirra; WNBA star Lisa Leslie;
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 Math Movie Network  Shawn Avery
This collection of studentmade videos stars kids explaining math procedures and concepts. Formerly known as "the Student Made Math Movie" wiki, the selfproclaimed "Home of Student Made Math Movies" features a section labeled "practice" embedded with
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 Math Munch  Justin Lanier
A weekly digest of "the mathematical Internet" that has featured "lots of cool mathy things" online since October, 2011. Blog posts have included "Mazes, Spirals, and Paper Folding"; "Pennies, Knights, and Origami Mazes"; "Turing, Nets, and More Yoshimoto";
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 Mathnasium Math Learning Centers  Mathnasium LLC
After school learning centers where students, grades preK to 12, "go to boost their math skills." Browse a directory of Mathnasium tutoring centers in the US and abroad. Read about the Mathnasium Method, created by former Los Angeles teacher Larry Martinek.
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 The MathNerds
A mathematical questionandanswer service on the Web that offers: free help with math questions; searchable archives; a "bestof" page (The Counterfeit Penny; Buildings and Ladders; The Magnificent Seven; The Hole Problem; Factor This; Rock Star Shuffle;
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 MathNet  Philip Spencer, Dept. of Mathematics, University of Toronto
Resources for high school students: interactive activities (Classic Fallacies, Keep the Traffic Moving) and mathematically interesting games (Tower of Hanoi, Game of Nim, Monty Hall Problem), questions and discussion, answers and explanation, problems
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 Math Nook
Free online math games that target a variety of skills; teaching tools and math worksheets for the classroom; and other educational material.
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 MathNotations  David Marain
Math investigations, challenges, problems of the day, and standardized test practice that emphasize the development of conceptual understanding in mathematics. Marain's blog, which dates back December of 2006, also features dialogue on issues in mathematics
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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 Online  SalemKeiser Public Schools, Oregon
SalemKeizer Public Schools of Salem, Oregon, designed this collection of daily math problems to help students in the third, fifth, and eighth grades prepare for the State of Oregon CIM Benchmark exams. Student exercises are organized by grade level,
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 Math On The Internet  Buffalo FreeNet Community & NonProfit Pages
K12 math problems and solutions posted weekly between 199698, at 5 levels of difficulty, with an archive of solutions for 1996 and links to related sites.
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 Math Open Reference  John Page
Page's free online geometry textbook provides interactive animations of geometry topics to enliven the teaching process and give students a deeper level of comprehension. With a glossary, quizzes, simulations such as "how to read a protractor," a graphing
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 Mathovore
Cours de maths et exercices de maths accompagnés (pour membres) de leurs corrigés détaillés.
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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 Pentagon
Hundreds of worksheets for practicing math on the iPad. The Math Pentagon app lets teachers create assignments, grade students, monitor progress, and remotely assist students. Subscriptions run 30 days, 90 days or 1 year.
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 MathPickle  Gordon Hamilton
Free videos that pose "rich math gems": Fibonacci Mutant Bunnies, Amoeba Squares, Kajitsu, Locker Room Prank, Area and Perimeter of Animals, Ballast Puzzles, and more. Select a grade band for PDF solutions, presentations in PowerPoint and Keynote formats,
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 The Math Place  Frank Sobierajski and Mickey Jo Sobierajski
Narrated PowerPoint presentations, problems, and video files of student solutions  some with references to versions published in journals such as Mathematics Teacher and supporting documents such as Geometer's Sketchpad sketches: Newton's Square Root
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