 J. Frederic Teubner, The Toymakers of JTEU  J. Frederic Teubner
See, in particular, the Reut·Reut 12x12 Transmagic Square. Also board, card, and dice games, magnets, tshirts, books and tapes, coloring books, an art gallery, and a millennium 2000 computer art calendar.
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 JFundi  Educational Software  Riekie Botha
JFundi offers educational software. Their first product is Times Tables intended to help children memorize the multiplication tables. The Java software runs on multiple platforms.
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 Jiskha Homework Help  Math  Jiskha Homework Help
Submit math questions or answers to this homework help forum. Jiskha archives past math problems and solutions for searching or browsing in reverse chronological order.
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 Job Interview  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: What issues should a teacher think about before a job interview?
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 Jo Boaler
From the author of What's Math Got to Do with It?: How Parents and Teachers Can Help Children Learn to Love Their Least Favorite Subject. Watch a YouTube clip of Boaler teach using Inquiry Based Learning method, or click through her presentation entitled
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 John Mason's Projects  John Mason
Projects by the author of Thinking Mathematically and former director of the Centre for Mathematics Education: Structured Variation Grids and other animations and applets; studies in algebraic thinking; mathematical explorations; MEMEs (Meaning Enquiry
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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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 John Olive's Home Page  John Olive, Department of Mathematics Education, The University of Georgia
Course descriptions and requirements for Computers in Mathematics Education and Investigations into the Teaching of Mathematics Grades 712. Recent articles, available online, include Computer Tools for Interactive Mathematical Activity in the Elementary
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 John Wiley & Sons, Inc.
John Wiley & Sons, Inc., develops, publishes, and sells products in print and electronic media for the educational, professional, scientific, technical, medical, and consumer markets worldwide. Search for a title among more than 11,000 listed in Wiley's
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 Join the Dots: a Math Line Puzzle  Math Forum
Can you connect 9 dots laid out 3x3 using 4 straight lines, without lifting your pencil from the paper? Questions, hints, solution.
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 Join the Math Forum: A Math Education Community Center on the Internet  Math Forum
How to become a member and contribute to the Math Forum. Gain access to the best Math resources on the Internet while helping to build a bigger and better community.
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 Journal of Mathematics Teacher Education  Kluwer
A journal devoted to topics and issues involving the education of teachers of mathematics, serving as a forum for critical analyses of innovative programs, research, technology, assessment, teaching diverse populations, policy matters, and developments
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 Journal of Urban Mathematics Education  David W. Stinson, EditorinChief
The Journal of Urban Mathematics Education (JUME) is a peer reviewed, openaccess, academic journal focused on research, pedagogy, and scholarship of mathematics in urban communities. K16 urban mathematics teachers and teacher educators are encouraged
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 Journey North  Annenberg Media
Register online (free) for a global study of wildlife migration. Read today's news, from monarch migrations to robin populations in the south; report sightings, search the site. Numerous supplemental materials are available online, and further materials
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 JovoToys  JOVO Click 'N Construct Math Manipulatives  Alexander's Polyhedra, Alex Doskey
JovoToys are polygon shaped pieces  equilateral triangles, squares and
regular pentagons  that click together on their edges, allowing them to
fold up to make three dimensional shapes. The JovoToys website shows
many different applications of
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 Joy of Problem Solving  Deepak Kulkarni
Math olympiad programs for elementary and middle school kids by a Ph. D. in computer science and former NASA researcher. See, in particular, the section of Kulkarni's site entitled "How to Work on Problems," which includes essays such as Problem Solving
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 Jude eClock : Mr. Myers' Classroom  Nathan Myers
Virtual manipulative for teaching various concepts in telling time. Features include the ability to change the clock's face (two different primary faces, Roman numerals, 12369, & graduated markings only), display of time in digital format, display
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 JumpingJoey  Psysoed Dynamics LLC
Learn the number line by jumping or walking a 30foot long, durable canvas number line. Also available as a placemat with dice and a board game.
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 Jumpin' Jehosaphat, the Counting Sheep  Shawn Dodds
Ask Jehosphat to solve the equation and watch her jump the answer.
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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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 Just a Usual Day at Unusual School (MegaMath)  Nancy Casey; Los Alamos National Laboratory
Students perform a play that takes place in a school where some of the students always lie and the rest always tell the truth. Terry, the protagonist, is trying to find out which students are which, but at the beginning, there is no way of knowing whom
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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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 Just What I Asked For
A kidsafe site designed to make it easy to find highquality resources on
the Web. Look for math under Education.
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 K12ASSESSL Mailing List
The goal of K12ASSESSL is to provide educators with a fast, convenient, and topical electronic discussion forum focusing on issues related to educational assessment in grades K12. It is hoped that K12ASSESSL will become the place for local assessment
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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 Educational Outreach Activities  National Optical Astronomy Observatories (NOAO)
Program highlights include The Use of Astronomy in Research Based Science Education, a proposed teacher workshop on using data in the classroom; products include Frequently Asked Questions about Being an Astronomer (a Spanish version of this FAQ is also
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 K12 Geometry  Math Forum
Links to some of the best Internet resources for geometry: classroom materials, software, interactive materials, Internet projects, and public forums for discussion.
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 K12 Math  BTRware.com
Math concepts, subjects, exercises, and examples for grades K through 12.
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 K12 Mathematics Curriculum Center (MCC)  Education Development Center, Inc. (EDC)
This NSFfunded K12 Mathematics Curriculum Center assists school districts as they select and implement standardsbased mathematics curricula. It provides a series of seminars, resource guides, cases and other written material, referrals, and phone consultations
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 K12 Math Problems, Puzzles, Tips & Tricks  Math Forum
Links to calculation tips (Beat the Calculator, Divisibility Rules, Multiplication Tips), Math Problem sets, and math number and line puzzles.
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 K12 Multimedia Math Education  Sparkle Productions
Software and research: reports and articles are available, with print and web references and resources, in the Motivation and Learning Center, which provides suggestions for parents on increasing their child's intrinsic desire to learn. Their math materials
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 K12OPPS Mailing List Archive  Global SchoolNet Foundation (GSN)
An archive of a moderated mailing list with announcements about contests, conferences, educational WWWeb sites and other opportunities geared towards the K12 community. Browse by month, or search.
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 K12 Practitioners' Circle  National Center for Education Statistics (NCES)
New content: a site designed to make the search for NCES and selected U.S. Department of Education K12 resources fast, easy, and productive. NCES offers a wealth of information for K12 practitioners, which this site attempts to put within easy reach.
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 K12 School Supplies: Math  K12 School Supplies LLC
Teaching aids, activities, and school supplies.
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 K12th Grade Mathematics Textbook Analysis  Jim Kelly
An analysis of a number of elementary and secondary school mathematics textbook series, using 1000 commonly used conceptual, operational and notational terms, intended to help education professionals match curriculum needs to existing materials. Also
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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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 K5 Stars  Sierra Vista Software
Subscription based Flash activities in reading and elementary mathematics. Free trial and moneyback guarantee available.
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 Kagan Publishing and Professional Development
Publications and teacher training to provide children with the situations in which they behave most cooperatively. In addition to greater cooperation, Kagan's "structures" aim for greater academic achievement, improved ethnic relations, enhanced selfesteem,
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 The Kaleidoscope Collector: How Kaleidoscopes Work  Hand of the Craftsman
Graphics from The Kaleidoscope Collector show the basis of and the dramatically different images produced by the three mirror, two mirror, twin mirror, and four mirror scope. Includes a brief kaleidoscope history.
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 KaleidoTile  The Geometry Center
A downloadable program for the Macintosh based on the Geometry Center's tiling program on display at the St. Paul Science Museum. You can use KaleidoTile to create and manipulate tessellations of the sphere, Euclidean plane and hyperbolic plane, and to
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 Kali  Jeff Weeks
Kali lets you draw symmetrical patterns based on any of the 17 tiling groups. It was written for a broad audience. Even the youngest children enjoy Kali. In particular, Kali does not assume the user knows how to read. For older students, Kali lets students
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 Kamanaga  Madhusudhan Nagarajan
Addition, subtraction, multiplication, and division worksheets to print out or to solve online interactively. Choose adding problems with or without "carrying," subtracting questions with or without "borrowing," and practice dividing with or without remainders.
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 KAMASUMA  KamaSuma
In this game, place the numbers so that the sums of each shape's vertices are equal. Often there is more than one correct solutionearn more points for each extra solution.
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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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 Kansas Association of Teachers of Mathematics
Bulletins, advocacy, resources, and more from the Kansas Association of Teachers of Mathematics (KATM). See, in particular, KATM's FlipBooks of of research, "unpacked" Common Core State Standards (CCSS) from many states, instructional strategies, and
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 Karismath  Shad Moarif
Learn math through visual scaffolding, whereby "... a math concept is first understood with the help of visualization, then gradually assimilated as an abstract idea in stages of decreasing visualisation and increasing numeracy." More than 10,000 worksheets
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 Ka's Geometriepage & MatheGalerie: Grundschulmathematik  Monika Schwarze
Eine Seite zur Grundschulmathematik mit SoftwareTipps. Links zu Mathematikunterrichtseinheiten für Grundschulkinder der Klassen 1 bis Klasse 4; Freiarbeitsmaterialien und kleinen Unterrichtsprojekten. A German Web site for teachers and lovers of geometry,
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 Kathy Schrock's Guide to Everything  Kathleen Schrock
A categorized list of sites for teachers on the Internet found to be useful for enhancing curriculum and professional growth. Updated daily in a wide variety of subjects, including Mathematics.
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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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 KenKen  Nextoy, LLC
KenKen is a sudoku variant invented by Japanese mathematics teacher Tetsuya Miyamoto. This site offers puzzles at various levels of difficulty to get you started, as well as rules, tips, news, related products, KenKen programs for your mobile device,
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