 InfoMath
Online K12 math, following the premise that learning mathematics the traditional way is more effective than by playing games. Webbased courses: Math Tutor, PreAlgebra Tutor, Algebra Tutor, PreCalculus.
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 Inhaltsverzeichnis Mathematik  C. Eisenhut
German language primers on arithmetic and basic operations, solving equations and inequalities, functions, probability and statistics, geometry, and more.
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 in pursuit of nerdiness
Blog by a middle grades and high school math teacher, formerly in the South Bronx, currently in the Netherlands teaching both within the Dutch national curriculum (in English) and within the International Baccalaureate Middle Years & Diploma Programs.
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 Inquiry maths  Blair, Andrew; and Martin, Caitriona
Inquiry prompts for topics related to number, algebra, and shape to use in secondary school mathematics. Accompanying notes support teachers who "want to make their lessons more open and, thereby, encourage student independence and leadership."
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 The Insight Method of Teaching Math  Robert Frick
How and why to teach math via mental models, as articulated by a cognitive psychologist who describes the "learning is memory" approach as "a disaster and a tragedy." See, in particular, Frick's sample problems: reverse arithmetic, expressing patterns,
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 Instant Math Series  France & Associates
A set of productivity tools for teachers and parents that will prepare tests or worksheets, as well as the answer keys. Useful for practice homework drills for parents who want to help their children learn math. Macintosh only. Demo available to download.
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 The Institute for Figuring  Margaret and Christine Wertheim, CoDirectors
"If mathematics is a language of pattern, its structures may be seen as the verses of a formal, yet fantastical poetics. Across the globe people have delighted in the harmonies of this language and the patterns discovered therein. These are the songs
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 InstructorWeb: Teaching Tools, Lesson Plans, Worksheets  Instructor WEB and Money Instructor
Lesson plans, worksheets, interactive lessons. Download or make your own worksheets. For teaching and learning basic skills including telling time, basic math, calendars, classifying, counting, recognition, money, reading, writing, and more skills. Limited
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 Integrating Mathematics and Methods  Beal, Klespis; Math Forum
An integrated mathematics content and methods course taught at St. Xavier University for preservice elementary school teachers. Integration is accomplished by presenting the material in a problemsolving format in a laboratory context, with students working
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 Interactivate: Assessments  Shodor Education Foundation, Inc.
A set of Shodor's Interactivate activities that allow the user to keep track of correct responses. To use these activities as "assessments" just select the "Keep Score" button on the Java applet page. A number of these activities, the Connect Four type
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 Interactive Mathematics Miscellany and Puzzles  Alexander Bogomolny
"The peculiar beauty of Mathematics lies in deduction, in the dependency of one fact upon another. The less expected a dependency is, the simpler the facts on which the deduction is based  the more beautiful is the result." This awardwinning site offers
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 InteractiveMathTutor.com  Howard Heller
Fee services include oneonone tutoring, email helper, phone helper, and homework helper. Register for free worksheets and solutions. Math subjects include elementary math, algebra, geometry, trigonometry, integrated math, calculus, statistics, and
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 International Mathematical Virtual Institute  DMBL (Scientific Society of Mathematicians Banja Luka)
The International Mathematical Virtual Institute (IMVI) promotes communication, cooperation and collaboration in the Balkans, elsewhere in Europe, and worldwide on research in (pure and applied) mathematics, history and philosophy of mathematics, and
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 International Preschool Curriculum  International Preschool Curriculum
The IPC is an international organization that focuses on the development of early learning education. It is also an association of schools, academics and teachers. Its curriculum is designed to meet and exceed foundation requirements set by governments
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 Internet Educational Workbook (INEW)
Learning by practicing: a hard copy workbook and an online mathematics worksheet database for use both in the classroom and at home, for students in Kindergarten through grade 6. There is also an online version of the worksheets with audio instructions
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 The Intrepid Mathematician  Anthony Bonato
Blog by a professor at Ryerson University (Toronto) "about mathematics in popular culture and my own journey as an academic, thinker, and writer." Posts, which date back to early 2015 and address nonmathematicians, have included "Caitlyn Jenner and the
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 Is Mathematical Teaching a Function of Time?  Andrej and Elena Cherkaev, eds.
A page of math humor, including definitions, anecdotes, math education jokes, theorems, puns, limerics, and links.
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 Isn't It a Great Time to Be Alive?  Rex Boggs
PDFs and Promethean ActivInspire flipchart files which survey the range of digital technology available to assist in the learning and teaching of mathematics. These free downloads accompanied the talk given by the veteran middle school math teacher to
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 IXL Learning
IXL provides free online practice, organized by grade levels K8 and aligned to state standards. Choose one math skill from among the hundreds offered, and submit your answer. Respond incorrectly, and click on the "explanation" button to learn more; get
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 J. Digital Tutoring Services  Jason Hankins
Online tutoring and educational links and DVDs. Live tutoring available in northern Chicago, Illinois/Wisconsin area.
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 Johnnie's Math Page  Johnnie Wilson
A directory of interactive math activities and tools for elementary and middle school children. The site is organized and presented so that children can easily find engaging and worthwhile math activities. The directory is organized by content: number,
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 Judy's Applications
Various calculatortype programs, including: Judy's TenKey (calculator program which features an editable tape which automatically recalculates when you make changes among other features, and a free demo version is downloadable here), Judy's Conversions
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 JUMP Math  JUMP Math
Teacher materials and professional development training by the numeracy program. Freely download PDFs of JUMP Math's introductory unit "Using Fractions" and other school resources. Also available in French. In 1998, mathematician and playwright Dr. John
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 Junior High and High School: Lesson Plans (The Lesson Plans Page)  Kyle Yamnitz, Univ. of Missouri
A searchable archive of lesson plans for statistics, numeracy and problemsolving, estimation, probability, and more. Includes suggestions for games, manipulatives, and spreadsheets.
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 JustMaths  Seager, Christian; Khawaja, Faisal; Muldowney, Melanie
Video tutorials, practice exam questions, and other intervention resources created by three teachers practicing in the UK Midlands. Free resources include "trumps" and exam questions in algebra, data handling, geometry and measure, number, and more. Blog
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 Just Us Teachers
Resource for elementary math teachers, with links to math clipart, math fonts, lesson plans and reproducibles, a poetry corner, and an area for ADHD.
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 k12.ed.math  Math Forum
A moderated discussion forum for K12 mathematics issues such as curriculum, assessment, classroom practices, suggested assignments, help on particular problems, grading practices, requests for advice, history of mathematics, etc. Messages are reviewed
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 K12 Math  BTRware.com
Math concepts, subjects, exercises, and examples for grades K through 12.
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 K12 Teaching Materials (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
An extensive list of Internet sites with significant collections of materials that can be used in the teaching of mathematics at the K12 level. Organized into categories: lesson plans, schools, software and other K12 Internet math sites.
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 K5 Learning  Roy Zanatta
K5 Math and K5 Math Facts are online learning programs for after school study, summer study, and homeschooling. The K5 Math online enrichment program consists of a free math assessment and over a thousand curriculabased, interactive tutorials and quizzes.
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 kanakku  Kumaresh Rajan
A JavaScriptpowered spreadsheet that performs arithmetic, trigonometric, statistical, and conversion functions. This free web application lets users cut, copy, and paste cell data; and save files to their desktops as .csv documents. Help video and tutorial
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 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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 Karismath  CLSO Learning Systems, Inc.
Math topics, including Algebra, are presented visually, through lessons (Flash animations that explain a target concept), demos (Flash animations that explain every exercise template to be used) and worksheets (PDF format) that can be downloaded. Each
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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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 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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 Khan Academy  Salman Khan
Salman Khan has recorded thousands of YouTube videos on a variety of topics, largely math and finance. The Khan Academy, which Khan founded, is a notforprofit organization with the mission of providing a high quality education to anyone, anywhere. To
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 Kids First  Coalition for Quality Children's Media (CQCM)
The Coalition for Quality Children's Media evaluates children's media, and is a resource center and clearinghouse for children's media that helps parents and kids find good adultapproved and kidtested programming. A searchable video and CDROM database
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 KidsNook
A search engine for children. Search for words like math, multiplication algebra, etc. to find games, songs, and sites for learning math.
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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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 Kindergarten Connection  Carol Gossett
A network of educational resources and materials, including teacher tips (both practical and theoretical), lesson plans, and links, from the owner and author of Honey Pot Press. There are three math games in the lesson plan section.
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 KinderIQ  Wade Luders
KinderIQ provides learning activities with immediate audio and visual feedback to help children master the earlychildhood skills needed in kindergarten. The company also provides freely downloadable PDFs of worksheets, activities, and learning games:
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 Knot a Braid of Links (CAMEL)  Canadian Mathematical Electronic Information Services
Mathematics on the Web: a collection of mathematical Links of the Week from 1996 on, with a new one every week. Maintained by CAMEL at Simon Fraser University.
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 Kostur's Postulate  Don Kostur
A Shockwave tool designed to teach numbers to toddlers and preschool age children.
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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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 kwizNET Learning System  kwizNET Learning
Automatically generated quizzes and worksheets, based on widely recognized curricula. Includes progress indicators and award certificates to keep students motivated.
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 language and literacy: Mathematics  John Bald
The author of The Literacy File and Using Phonics to Teach Reading and Writing, Bald teaches reading, writing, and foreign languages in the UK. His blog posts, which date back to August, 2008, have included "Language, understanding and confidence in maths,"
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 The Latin School of Chicago Middle School Problem of the Week  Tom Canright
Math and logic puzzles  many original, some reproduced from sources such as NCTM journals  with solutions presented in accompanying videos.
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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 by Yourself  Moti Levi
LearnByYourself is a series of downloadable math books that ensure students' success by allowing them to learn without a teacher. Each book is only $3. Each book focuses on one topic, such as Fractions, and provide complete and clear explanations, advancing
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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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