 Change the Equation
This nonprofit, nonpartisan CEOled initiative aims to "solve America's innovation problem. It answers the call of President Obama's Educate to Innovate Campaign to move the U.S. to the top of the pack in science and math education," with science, technology,
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 Chaos at Maryland  The Chaos Group, the University of Maryland at College Park
Research in chaotic dynamics: the theory of dimensions, fractal basin boundaries, chaotic scattering, controlling chaos, and more. Read research papers, link to Daniel P. Lathrop's Nonlinear Dynamics Lab and the Pattern Formation Laboratory, learn about
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 Cmathématique  Téléfiction
Liens à consulter classés par sujet et par niveau; des problèmes du mois, un concours pour l'honneur dont les meilleures solutions de participants seront publiées sur le site; des capsules "crack" mathématiques offrant
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 Collaborative Mathematics  Jason Ermer
Videos for connecting "a worldwide community of mathematical problem solvers" and "cultivating a productive attitude toward challenging problems: one of creativity, resourcefulness, selfconfidence, and perseverance." Two and threeminutelong challenges
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 Colm Mulcahy
Blog by a recipient of the Mathematical Association of America's Allendoerfer Award for excellence in expository writing. Posts, which date back to October, 2012, have included "Weak Math? Try Math Week!" and "Oranges and Apples Comparisons: The Roots
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 comp.softsys.matlab  Math Forum
An unmoderated discussion group, available via the Math Forum's archive (from which you can view messages, search them, and register to post), or in mailing list or newsgroup format, providing an opportunity for users of the software package Matlab to
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 The Computational Geometry Impact Task Force Report  Jeff Erickson
In April 1996, Bernard Chazelle's Computational Geometry Impact Task Force published a report entitled "Application Challenges to Computational Geometry" about the relation between computational geometry and various application fields. The report is available
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 Confronting Technology  Lowell Monke
This site provides a variety of resources critically examining the relationship between human beings and technology, with specific resources on the way computers are used in education. They include: an annotated bibliography, a list of documents available
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 Connect Capture Game  Rick Nordal
This paper and pencil game combines chess with dotsandboxes. Completing a box "activates" the enclosed chess piece, which may then capture other activated chess pieces for points.
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 Consortium for School Networking (CoSN)  Information Institute of Syracuse
A community of organizations, government agencies, corporations, and individuals in important leadership roles formed to further the development and use of telecommunications in K12 education. Topics include legislative issues, conference participants
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 Constructing Math Instruction  Chris Robinson
Blog by teacher "averse to binary thinking that refuses to countenance all the complexities of the minefield that is the real classroom." Posts, which date back to December, 2012, have included "Number Sense and My Students"; "Analyzing Student Questions";
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 Continuous Everywhere but Differentiable Nowhere  Sameer Shah
Blog by a high school math teacher in Brooklyn (NY), beginning shortly before teacher training and orientation, upon realizing that the textbook "completely limits me as a teacher and as a creative person" and who subsequently sets out to "design clear,
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 Crewton Ramone's Blog of Math  Crewton Ramone
Ramone's blog, which dates back to July, 2009, has included posts  many with video  such as "Fractions Despite SPED," "Why Invert and Multiply," "4 Year Old Math Enrichment," "Fractions and Addends," "Fractions and Autism Do in Fact Mix," and "Fraction
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 Cryptoclub  Vera Pless, Janet Beissinger
This website includes tools to encrypt and decrypt messages, an
animated treasure hunt, a classroom message board to send and
receive encrypted messages, and a place to explore mathematics
topics related to cryptography, such as prime numbers and
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 Cryptonomicon.Net  Matthew S. Hamrick; PhPNuke
A community portal site for amateurs and professionals with an interest in cryptography. The site has some original content and news stories, but the Web links section (with over 1100 links to crypto and security related sites) is most interesting.
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 The CTK Exchange  Interactive Math Miscellany and Puzzles, Alexander Bogomolny
A page devoted to questions and answers concerning Bogomolny's pages and math in general. Postings are approved by Bogomolny, and usually answered by him, although they may be answered by the general public as well. Posting topics vary all the way from
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 CUNY Games Network  CUNY Academic Commons
Blog about the pedagogical uses of both digital and nondigital math games, how they improve student success, and how they encourage research and scholarship in the developing field of gamesbased learning. Posts, which date back to July, 2011, have included
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 Curmudgeon
Blog by a veteran math teacher in Vermont who "believes that math should be taught, not collaboratively explored; algebra and geometry are better than a vague course of Integrated Math; spiraling doesn't work nearly as well as learning it properly the
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 Cyberpapy  Boulanger
Posez votres questions des devoirs dans les forums; des "cyberpapys" répondent.
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 CyMath
Stepbystep typeset results in differential calculus, integral calculus, algebra, and trigonometry. Just key in your expression or equation — or modify one of CyMath's examples — then select from among eight actions in the pulldown menu:
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 Daniel Willingham
From the author of Why Don't Students Like School? and When Can You Trust the Experts? (subtitled: "How to tell good science from bad in education"). See, in particular, Willingham's articles, such as "Why transfer is hard," "Why students remember or
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 Data Envelopment Analysis (DEA) Homepage  Ali Emrouznejad
A resource site for DEA, an operational research tool for measuring technical efficiency. Includes a brief introduction, glossary, models, bibliography, dissertations, books, people in the field, tutorial, course, data sets, software, discussions, links,
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 The De Morgan Journal  London Mathematical Society
The De Morgan Journal aims "to encourage academic mathematicians to reflect on current issues in mathematics education at all levels, from primary school to graduate studies; to encourage them to explore links between higher mathematics and elementary
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 discretemath  Math Forum
A discussion group for subject matter concerning teaching and researching of discrete mathematics at all levels. It began as a closed list for the researchers and educators who participated in the Rutgers University Discrete Math and Theoretical Computer
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 Discussion Groups: Technology  Texas Instruments
Read, search, and post to groups about TI products: Scientific Calculators, TI10, TI73, TI80/81, TI82/83/83 Plus/Silver Edition, TI85/86, TI89/Voyage 200/TI92 Plus, CAS and Symbolic Math Guide, Graphing Calculator Comparisons, Derive, muLISP, TI
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 Discussions  Math Forum
The Math Forum's discussions include mathematics and math educationrelated newsgroups, mailing lists, and Webbased discussions. Read recent and older messages, find out how to subscribe to a mailing list that interests you, read an MAA Online article
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 Disfruta Las Matemáticas  Rod Pierce, mathsisfun.com
Spanish language version of Maths is Fun.
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 Division by Zero  Dave Richeson
A blog about "math, puzzles, teaching, and academic technology." Posts, which date back to September of 2008 and sometimes introduce original applets, have included "Volumes of ndimensional balls," "Albrecht Dürer's ruler and compass constructions,"
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 Doing Mathematics  Bryan Meyer
Blog by an eleventh grade math teacher at a projectbased learning (PBL) school pursuing a Masters Degree in Teacher Leadership. Posts, which date back to February, 2012, have included "What Bowflex Can Teach Us about Assessment," "Habits of a Mathematician,"
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 Domebook  Tom Camilli
Cardboard and transparent plastic geodesic domes built by children. Students start by constructing paper models, then apply scale factors to construct domes of any size using cardboard or wooden dowels and plastic sheeting. See pictures of classroom projects;
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 Dr. Alfred Posamentier  Education Update, Inc.
Blog by the Dean of Education at Mercy College (New York). Posamentier's Posts, which date back to August, 2010, have included "A Power Loop," "The Unusual Number Nine," "The Irrepressible Number 1," "Enriching Mathematics Instruction, Rather than Teaching
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 Drawing on Math  Tina Cardone
Blog by a public high school math teacher in Massachusetts who has participated in Boston University's PROMYS and the Institute of Advanced Studies' PCMI. Posts, which date back to August, 2011, have included "End of Year Reflections: Geometry Favorite
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 dy/dan  Dan Meyer
Meyer has taught high school math since 2004, and blogged about it since September, 2006, with two interests in particular: curriculum design (answering the question, "how we design the ideal learning experience for students?") and teacher education (answering
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 Early Algebra, Early Arithmetic  TERC and Tufts University
The Early Algebra Project examines young learners as they express general relationships among numbers and quantities through written notation, tables, and diagrams. Download PDFs of class materials such as lesson plans and student worksheets; discuss
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 Eat. Sleep. Math.
A Tumblr "repository for mathrelated links, anecdotes, code, and random thoughts" by a UCLA undergraduate. Posts, which date back to November, 2013, have included "Yesterday my friend and I passed Terence Tao in the MS building while I was explaining
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 Economic and Game Theory  David K. Levine, Department of Economics, UCLA
A site that uses the tools of modern economic theory and game theory to explore how the interaction of intelligent goalseeking individuals determines social outcomes. The site offers general interest material, undergraduate and graduate course material,
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 EDeafMath  Dawn Kidd
Vlog for anyone who teaches "at least one deaf or hard of hearing student." Posts, which date back to February, 2013, include "Texas Math Sign Language Dictionary" and "50 Plus Ideas for Using Document Cameras in the Classroom." Kidd teaches middle school
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 educating grace
A blog about mathematical thinking, teaching students to think, thinking about teaching students, and ending educational inequity, especially in math. The posts by this former high school math teacher who now develops teacher training date back to August,
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 Educational Aspirations
"Ramblings from a 21st century educator" who specializes in differentiating math and seeks to make the subject "more engaging and relevant to students' lives." Blog posts, which date back to July, 2011, have included "Measuring Student Growth," "Twitter
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 education.ti.com  Texas Instruments, Inc.
Texas Instruments calculator resources and educational solutions: product information; free program downloads; classroom activities, including both a test prep section and a free, collaborative forum for sharing favorite activities that use TI technology,
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 Edusolution.com  Levi Anthony
Edusolution.com's math center provides New York State Regents Math A, Math B, and Math Courses 1, 2, and 3 exams, with answer keys, dating back to 1999; as well as autoscoring online math quizzes, a discussion forum for teachers, and New York State standards.
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 Edward Tufte
The work of Tufte and Graphics Press. Read testimonials about his books and purchase them online: The Graphic Display of Quantitative Information, Envisioning Information, and Visual Explanations: Images and Quantities, Evidence and Narrative. In the
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 EdWeb: Exploring Technology and School Reform  Andy Carvin
A hyperbook designed to explore the worlds of educational reform and information technology. Hunt down online educational resources around the world, learn about trends in education policy and information infrastructure development, examine success stories
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 Egres Open  Tamás Király
A wiki forum for open problems in combinatorial optimization: colouring, cycles and paths, edgeconnectivity, integer polyhedra, matchings, matrices with indeterminates, matroids, nodeconnectivity, orientations, packing common bases, rigidity, stable
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 Electronics Library, Electronics Community
Thousands of links to R&D documents in electronics. Utilities, general electronics, components, circuits, digital signal processing, measuring, electromagnetics, electric effect, energy, communications, more on the Web. Community and forum.
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 Elementary Math Games and Activities  Math Lessons, Belmont Education
Games, newsletters, articles, and worksheets. Games are for sale, other items free with registration. The authors also post new ideas and receive feedback on the Teaching Math Blog, where past articles and videos have included "30 Tips for teaching Elementary
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 Elements of Abstract and Linear Algebra  Edwin H. Connell; Dept. of Mathematics and Computer Science, Univ. of Miami
A free online textbook in four formats: PDF, DVI, PS, and PSGZ, with six chapters: Background (equivalence relations, injective, surjective, and bijective functions, product of sets, unique prime factorization in the integers); Groups; Rings; Matrices
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 eMentoring Network  American Mathematical Society
A blog "designed to address relevant questions that students, postdoctoral researchers and junior faculty may have regarding their own advancement in mathematics," such as considering graduate school, choosing a graduate program, leveraging research experiences
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 emergent math  Geoff Krall
"Teaching math is difficult. Teaching math in an interesting, engaging, and effective manner is even more difficult. This blog is dedicated to brainstorming interesting and dynamic math problems and projects," with emphasis on Project/Problem Based Learning
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 Encouraging Mathematical Thinking, Discourse around a Rich Problem  Math Forum: Bridging Research and Practice Group (BRAP)
This videopaper by the Math Forum's Bridging Research and Practice Group (BRAP) of teacher practitioners and Math Forum Staff opens a conversation around the use of discourse as a basis for encouraging students' mathematical thinking and supporting teachers'
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