 Middle School Math Rules!  Sherrie Nackel
Blog by a seventh grade math teacher for "sharing ideas with other teachers and hopefully networking with other dedicated and creative middle school math teachers." Posts, which date back to July, 2011, have included "Number activity for first day," "First
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 mikesmathpage  Mike Lawler
Blog by a former math professor "writing about math with my kids." Posts, many with videos of Lawler and his children at a whiteboard, date back to November, 2013: "Day in the life of a home school dad," "Family Math and paper folding," "Fun with James
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 misscalcul8
Blog by a high school teacher of algebra and geometry who "expects to be the best teacher that has ever lived, to change the world, and to live wealthy." Posts, which date back to February, 2009, have included "This, My Friend, Is Learning," "7 Country
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 Misunderstood Minds  PBS
The science behind learning difference, and strategies to aid success in school, are available on this companion Web site for the Misunderstood Minds PBS documentary. The site includes profiles of the students in the documentary, as well as sections on
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 More than a Geek  Lois Burke
Blog by a high school math teacher in Philadelphia who participated in the Emerging Communities for Mathematical Practices and Assessment (EnCoMPASS) institute. Burke, who began blogging in June, 2013 about life in and out of the classroom, describes
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 Mr. Orr is a Geek.com  Jon Orr
Blog by a Chatham, Ontario (Canada) secondary school math teacher. Posts, which date back to February, 2009, have included "Gr. 11 Quadratics Functions in the real world," "Grade 12 – Mind Map for Project," "Grade 9 Pentominoes," "Grade 11 – Exponential
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 Mrs. Glosser's Math Goodies  Gisele Glosser
Interactive math lessons that work online and offline in a Web browser, and provide immediate feedback to students, with in addition Worksheets (on circumference and area; exponents; expressions and equations; integers; Ocean Math; order of operations;
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 mrs. tinashe blanchet  Tinashe Blanchet
Courses, collaborations, and other content by Blanchet, who teaches high school math in Marrero, Louisiana. Freelyaccessible Moodle classes have included International Baccalaureate (IB) Math Studies and Advanced Math/PreCalculus; professional development
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 mrstko  Teresa Orpen
Blog by a high school algebra teacher. Posts, which date back to January, 2014, have included "Perfect 10" and "Plickers, with a 'P.'"
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 Mr. Vaudrey's Class  Matt Vaudrey
Blog by a secondary educator who "wears costumes, plays loud music, stands on desks, and shows pictures and video — all to make math meaningful for his students." The contents of mathematical posts, which date back to January, 2008, have included
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 Musing Mathematically  Nat Banting
Thoughts from a high school mathematics teacher on the teaching of mathematics, and the learning of mathematics. Posts, which date back to May, 2011, have included "Playing with Mean, Median & Mode," "Attaching a 'Why' to the 'How," "The Mathematics
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 Musings from Mrs. Galvan  Regan Galvan
Blog of "thoughts on teaching math and on promoting social, emotional wellness among my students and colleagues" by a selfdescribed fan of students creating digital portfolios in math. Posts, which date back to February, 2013, have included "Geometry
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 My Math Forum  Julien Santini
Discussion forums that concentrate on college and high school mathematics. Santini posts PDFs of two Weekly Problems, one intended for advanced high school students, the other for college students. See also his "250 Solved Problems," with downloadable
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 My Reckonings  Ron Doerfler
Doerfler's book Dead Reckonings: Calculating without Instruments "describes techniques of computation and approximation that can be used to rapidly and mentally calculate mathematical quantities." Other sections of the site discuss sundials; astrolabes
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 Nathan Selikoff
Works, publications, blog, and more from a "fine artist playing at the intersection of interactivity, math, and code." Works have included "Beautiful Chaos" (interactive software art), "Intersect"
(a public art installation), "Four Dimensions" (a realtime
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 National Center to Improve Practice (NCIP)  Education Development Center, Inc. (EDC)
The National Center to Improve Practice in Special Education Through Technology, Media and Materials promotes the effective use of technology to enhance educational outcomes for students with sensory, cognitive, physical and social/emotional disabilities.
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 National Commission on Mathematics and Science Teaching for the 21st Century  U.S. Department of Education
A Glenn Commission plan to ensure that every American student receives excellent instruction in math and science  instruction critical to maintaining the U.S. edge in the competitive global economy. The report sets three goals: to establish an ongoing
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 NationMaster.com  Luke Metcalfe
A website for generating graphs and correlations based on numerical data extracted from the CIA World Factbook, United Nations, World Health Organization, World Bank, World Resources Institute, UNESCO, UNICEF, OECD, and other sources of indicators that
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 Natural Math  Maria Droujkova
Read about Natural Math research projects, publications, conference presentations, seminars, classes, workshops, and consultations. Download Word documents of research articles such as "Girls on track with information technology," "Using XP with children
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 The nCategory Café  John Baez, David Corfield, and Urs Schreiber
A blog devoted to "that heady interface between physics, mathematics and philosophy." Read posts, many with MathML, that date back to August, 2006.
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 NCTM Standards 2000 Discussion Area  NCTM/Math Forum
Discussions devoted to public input on the NCTM Standards 2000 project. Questions posted by the moderator include such concerns as areas of mathematics deserving of emphasis, mathematical thinking skills, philosophies and practices, basic skills and conceptual
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 Newtechtimeline  Tom Riley
Blog by a teacher of mathematics and New Technologies Coordinator at the de Ferrers Academy, Burtonon Trent, UK. An Apple Distinguished Educator (class of 2013), Riley has posted since January, 2012: "How not to use Google Sites for your (Maths) classes,"
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 Nix the Tricks
Problematic vocabulary, notation, mnemonics, and other shortcuts reconsidered and "fixed" by teachers who "want to put a stop to the superficial, cheap tricks that have infected the teaching and learning of math." Submit your own trick, or debate and
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 The NODE Learning Technologies Network  The NODE Learning Technologies Network
theNode.org provides networked support for instructors, trainers, designers and administrators with a professional interest in teaching with technology. Register for membership online. Internet resources for the study and teaching of mathematics include
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 NumberADay  The Mathematical Association of America (MAA)
Every working day, a new positive integer, with a selection of its properties and an illustration or photograph.
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 Number Loving Beagle  Megan Schmidt
Blog by a high school teacher in Minnesota who also serves as the head of her math department. Posts, which date back to September, 2013, have included "Aha for patient problem solving"; "Creating Mathematically Curious Students"; "A Speedy Makeover for
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 Number Loving  Laura ReesHughes and Sharon Derbyshire
Freely downloadable PDFs, Microsoft Word documents, and PowerPoint presentations, organized by UK key stages, strands, and topics. The Number Loving blog offers new approaches for teaching maths and tips for classroom makeovers. Posts, which date back
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 A Number of Things  Karyn Vogel
Blog where a K5 Math Coach in Burlington (VT) "shares ideas and resources related to mathematics and education." Posts, which date back to October, 2011, have included "Math and Image," "A new way of problemsolving," "Sugar and Ice book review," "Plus
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 Numberplay  The New York Times
Mathematical, logical and scientific puzzles, with solution "recaps." The posts, by Gary Antonick and Pradeep Mutalik, have included "Surreal Hat Tricks," "The Puzzles of Pickover," "Prime Rib at Hogwarts," "Nim for (a) Change," "Phi  The Magic and the
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 Numbers  Kirsten Silverman
Blog by a Massachusetts middle school math teacher who "loves number theory and thinks sixth grade is the perfect place to share this." Posts, which date back to August, 2012, have included "Flipping"; "Cogs"; "LCM, GCF, and Fractions"; "Ordering Fractions";
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 The Number Warrior  Jason Dyer
Blog by an algebra and calculus teacher. Posts, which date back to January, 2008, have included "The Educational Problem with Teaching Multiplication as Repeated Addition," "Nonlinear lesson design (Giant Ants of Doom)," "The design of mathematical notation,"
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 numeracy  Adult Numeracy Network, Math Forum
A mailing list for those interested in the discussion of educational issues around adult mathematical literacy (ABE/GED/ESL, workplace, and literacy teachers, tutors, and adult learners), maintained by the Adult Numeracy Network (ANN). Read and search
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 nyscollmath  Math Forum
The college level mathematics discussion group of the Association of Math Teachers of New York State. Anyone interested in math education beyond high school is welcome to join. Read and search archived messages; and register to post to the discussions.
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 nysmath48  Math Forum
The discussion group of the Association of Math Teachers of New York State dedicated to the "Grade 4" and "Grade 8" Math Assessments. Teachers, administrators, NYSED personnel, and anyone interested in this NY statespecific topic are encouraged to take
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 nysmathab  Math Forum
The discussion group of the Association of Math Teachers of New York State dedicated to the "Math A" and "Math B" Assessments. Teachers, administrators, NYSED personnel, and anyone interested in this NY statespecific topic are encouraged to take part.
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 nysmhs  Math Forum
The discussion group of the Association of Math Teachers of New York State's Math Honor Society. All NYSMHS members are encouraged to join this group, as are others who wish to converse about statewide math honor societies. Read and search archived messages;
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 nysmmn  Math Forum
The discussion group of the Association of Math Teachers of New York State's Math Mentor Network. This list is specifically for Elementary Math Mentors in the state, but welcomes all who have an interest in elementary math education. Read and search archived
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 OER Commons  Institute for the Study of Knowledge Management in Education
An open learning network for teachers and professors to access their colleagues' course materials, share their own, and collaborate. The Open Educational Resources site features tags, ratings, comments, reviews, and social networking functions, as well
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 Off The Hypotenuse  Glenn Kenyon
Kenyon started this blog in pursuit of "a good discussion of resources, ideas, and innovative ideas for teachers of Algebra." Humorous videos, comic strips, and posts, which date back to March of 2007, have included "Math Lessons learned from Karate,"
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 one good thing
Blog by a group of "dedicated, fascinated, hardworking, inspiring" secondary teachers who believe that "every day may not be good, but every day there is (at least) one good thing worth sharing. Here are our stories." Posts, which date back to January,
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 One on Epsilon  One on Epsilon Pty Ltd
Blog of "exploratory, curiositydriven mathematics." Posts, which date back to October, 2016, have included "Designing Square Root Marbles for iOS"; "The Number Game and the Silent Version"; "All, None and Forever"; "A Formula for the Personality of a
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 Online Math Education  Yordan Petrov Petrov
Math tutorials and quizzes, with some math history information as well. Includes a discussion forum. Available in English or Bulgarian.
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 OpenMathText.org  David A. Santos, Alain Schremmer
OpenMathText.org is a depository of free, downloadable texts and is primarily dedicated to the specification, development, and dissemination of free, editable and downloadable mathematical texts aimed, mainly, at "just plain folk." OMTo invites registrants
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 Open Problem Garden  Matt DeVos and Robert Šámal
A collection of unsolved problems  mainly, graph theory, combinatorics, and number theory. A wiki for each open problem includes relevant bibliographical citations, importance rating, and recommendation for undergraduates. Navigate by math subject,
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 Orig4mi  Jorge C. Lucero
Origami na ciência, tecnologia e design. Desde outubro, 2008, este profesor da Universidade de Brasília tem escrito neste blog artigos diversos sobre origami, inclusive abrigos dobráveis de bambu, origami com moléculas de DNA,
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 Overthinking My Teaching  Christopher Danielson
Blog by a community college math teacher "interested in hard questions about teaching." Posts, which date back to July, 2009, have included "Wump hats," "An unnoticed rule for number language," "The end of word problems," "Cubeyness," "Cardinal and ordinal
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 The Pai Intersect  Jimmy Pai
Blog by an Ottawa (Canada) secondary mathematics teacher and graduate student in education. Posts, which date back to August, 2012, have included "Understanding Fraction Division #2  Part 1," "$100 Tablet Project," "Spiraling through the curriculum,"
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 Palmer's Ponderings  Christina Palmer
Blog by a high school math teacher in Massachusetts. Posts, which date back to June, 2013, have included "I wonder...... (Cheerios in a chimney box)," "Four = Eight (almost)," "Today I Shut Up," "State Test Questions That Make Me Angry," "TMC14," "Compounding
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 Park School Math  Park School of Baltimore
The math teachers at The Park School (Baltimore, MD) agree that "learning how to think is at least as important a part of a good mathematics education as is the core content.... However, we are all in constant friendly mutual disagreement about how best
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 Pearson Learning  Dale Seymour Publications
A leading publisher of educational materials, emphasizing math, science, and the arts. The site contains: an online catalog; math curricula include: CMP (the Connected Mathematics Project) and Investigations (Investigations in Number, Data, and Space,
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