 An Investigation of Subtraction Algorithms from the 18th and 19th Centuries  Nicole M. WessmanEnzinger
An exploration of different algorithms used during 18th and 19th century America, with discussion of implications for the modern teacher. This article, which originally appeared in the January 2014 issue of the Mathematical Association of America (MAA)
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 Investigations in Number, Data, and Space (TERC)  Testbed for Collaboration, Eisenhower Regional Consortia
A K5 mathematics curriculum with four major goals: to offer students meaningful mathematical problems; emphasize depth in mathematical thinking rather than superficial exposure to a series of fragmented topics; communicate mathematics content and pedagogy
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 iPracticeMath
Type in your responses to iPracticeMath's online multiplechoice questions, and press the orange "submit" button to check your answers: addition, subtraction, multiplication, division, algebra, "word to number" (interpreting writtenout quantities), and
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 I Support the Common Core  McCallum, Bill; and Zimba, Jason
Blog "for people who want to be active in support of the Common Core State Standards" (CCSS). Posts, which date back to August, 2013, have included "Cathy Kessel critiques the critiques," "A mathematician on the rigor of the Common Core," "The Coming
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 It's a Small World  Guillermo E. Pedroni, L. D. Brady Elementary School. Aurora, IL
A collaborative learning project combining email penpals with Internet research and bilingual (English/Spanish) writing projects. The site contains a project summary (with assessment rubric and list of standards addressed), scenario, student pages (find
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 I Used To Believe  Mat Connolley
A collection of childhood beliefs, such as thinking that cats are female dogs, that seeds swallowed will sprout fruit from your ears, and a primal fear of toilets. "Some of the beliefs come from overactive imaginations, but a lot are the result of parental
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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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 Jamit Fractions  JAMIT Software
Software for learning fractions, for students from 8 years old to adults. Topics are presented in short lessons, each with references, examples, and a practice game that generates problems to be solved. A free version is on the Web; Part One may be purchased
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 JAN (Job Accommodation Network)  President's Committee on Employment of People with Disabilities
An international tollfree consulting service that provides information about job accommodations and the employability of people with functional limitations. JAN's mission is to assist in the hiring, retraining, retention or advancement of persons with
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 The JASON Project
A yearround scientific expedition designed to excite and engage students in science and technology, and to motivate and provide professional development for teachers. The project mounts a twoweek scientific expedition each year. The team conducts research
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 JAVA Gallery of Interactive OnLine Geometry  The Geometry Center
Applets illustrating geometry concepts. WebEQ, Hyperbolic Triangles, Lorenz Simulation, OneDimensional Iteration, Tetris, Leap Fractal, Fractals from Iterated Function Systems, Kali: Wallpaper Patterns. Created by The Geometry Center.
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 Javascript School Math Toolkit  Jeff LeMieux
JavaScript Pythagorean solver, proportion problem solver, percent proportion problem solver, chord to circumference calculator, denominator to repeating decimal checker, subtraction worksheet generator, addition worksheet generator, multiplication worksheet
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 JEST  The Journal of Extraneous Scientific Topics  Russel and Rebecca Carlson
A newsletter for children: puzzles and an archive of past articles, Ask Dr. Iva (how does a banana work?), and the Homepage of Quadrant NQ.
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 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 Jerrim
Publications, blog, and other resources by a University College London Reader in Educational and Social Statistics who has worked extensively with the OECD Programme for International Student Assessment (PISA) data. Jerrim has organized publications into
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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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