 125 Questions: What Don't We Know?  Science Magazine
Science celebrated its 125th anniversary with a look forward at the most compelling puzzles and questions facing scientists today. Accompanied by reader's forums and other online extras, this free news feature explores 125 big questions that face scientific
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 17Calculus
Concepts, examples, videos, and practice problems to help students better understand the concepts of precalculus, single variable calculus, multivariable calculus, and differential equations. Formerly known as MathZar.
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 17GoldenFish  Nathaniel Highstein
Blog by a high school math teacher and college art teacher. Posts, which date back to April, 2013, have included "Math, Art Education, and RiskTaking," "Triangle Centers and Student Empowerment," "'First Past The Post' And The Dreaded Disease 'Z,'" "Mountain
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 21st Century Educator  David Wees
Wees serves as the learning specialist for information technology at Stratford Hall (Vancouver, BC). His blog posts, which date back to November, 2008, have included "Creating a WiiMote interactive white board at my school for under $50," "Eight Videos
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 Actuarial Outpost  Glenn Cooke
Actuarial website with discussion forum, free study material, and job postings. Also available at http://www.actuarialoutpost.com/.
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 The Ada Project (TAP)  Carol Frieze and Women@SCS; Carnegie Mellon University
Tapping Internet Resources for Women in Computer Science, this site serves as a clearinghouse for information and resources relating to women in computing: conferences, projects, discussion groups and organizations, fellowships and grants, notable women
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 Adult Numeracy Network (ANN)
A community dedicated to highquality mathematics instruction at the adult level. ANN conducts preconferences at the annual NCTM national meetings; publishes the Math Practitioner Newsletter; sponsors the
Numeracy List, an adult electronic forum; and
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 AgentSheets  AgentSheets, Inc.
A combination of enduser programmable agents, spreadsheets and Java authoring tools. The new version of AgentSheets lets endusers build a wide range of applications that include interactive simulations, games, and intelligent web agents. Projects created
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 Alexandre Borovik
Borovik teaches and researches group theory at the University of Manchester (UK), where he is a Professor of Pure Mathematics. See his eightpoint teaching manifesto, read about his methodology, and download slides of selected talks, which include "Hidden
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 Algebra 4 All
A community of educators sharing resources and supporting one another in the practice of teaching algebra: lesson sharing, applets for students and teachers, discussion forum, blogs, media, and other content related to the functionsbased approach to
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 Algebrainiac  Jessica Bogie
Blog by a Chicagoland middle school geometry and history teacher with more than a decade of experience teaching algebra and prealgebra. Posts, which date back to August, 2012, have included "#MSSunFun: Teaching Students How to Study for Assessments,"
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 Algebra Nation  The University of Florida Lastinger Center
Free help for Florida students preparing to take the state's computerbased Algebra EndofCourse (EOC) Exam. Each video content review session includes two clips — one, taught by a male; the other, taught by a female — encourages students
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 Algebra's Friend  Beth Ferguson
High school math teaching experiences blogged by Ferguson, who for decades has served as a classroom teacher, a district consultant, a school principal, and an online university instructor in curriculum, instruction, and gifted education. Posts, which
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 ALLREALS+BLOG  Marty Romero
Blog about "effective educational reforms/policies and empowering students through equitable pedagogical practices." Posts, which date back to September, 2012, have included "Procedural Knowledge vs. Conceptual Understanding (A Dad's dilemma)"; "Obesity
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 All the News That's Fit to Math
Blog of mathematical questions that arise from news headlines. Posted by an Australian teacher since January, 2014, entries have included "The decline of cancer rates in the USA," "The Royal Family's Spending Habits," and "Are Super Bowl ads worth it?"
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 Almost Looks Like Work  Jason Cole
Blog of Matlab plots, animations, and other explorations by a PhD student "with a passion for physics, maths, and data visualization." Posts, which Cole describe as "lighthearted" and date back to July, 2014, have included "WiFi strife," "Antics," "Damp
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 alt.algebra.help  Math Forum
An unmoderated newsgroup focused on algebra. Read and search archived messages; and register to post to the discussions.
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 alt.math.recreational  Math Forum
An unmoderated newgroup focused on recreational mathematics. Read and search archived messages; and register to post to the discussions.
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 alt.math.undergrad  Math Forum
An unmoderated discussion forum for issues and problems pertaining to college undergraduate mathematics. Read and search archived messages; and register to post to the discussions.
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 amte  Association of Mathematics Teacher Educators, Math Forum
A mailing list for discussions concerning teaching standards and practices at the K16 level. Read and search archived messages up through the list's last activity, in September, 2000.
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 amtnys  Math Forum
The general discussion group of the Association of Mathematics Teachers of New York State. Use this service to discuss items of interest to math educators everywhere. Read and search archived messages; and register to post to the discussions.
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 Analysis of Algorithms  Flajolet, Prodinger
A research site with papers to download, links to researchers, a newsletter, etc. Analysis of Algorithms (AofA) is a field in computer science whose overall goal is an understanding of the complexity of algorithms. While much research is devoted to worstcase
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 Analysis WebNotes  John Lindsay Orr; Dept. of Mathematics & Statistics, Univ. of NebraskaLincoln
An extensive collection of analysis resources, including class notes, discussion boards, and homework assignments, with questions and answers from analysis labs, and techniques of proofs. There are interactive demonstrations of several central themes
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 Angles of Reflection  John Benson and P. J. Karafiol
A backandforth intergenerational blog on math education, begun in January, 2011, by two Presidential Awardees in Mathematics from the state of Illinois.
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 apcalc  The College Board, Math Forum
The Advanced Placement Calculus mailing list is hosted by The College Board and archived by the Math Forum. Designed for precollege students preparing for AP tests, the level of discussion and the explicit relation to the college sequence may also make
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 The Aperiodical  Steckles, Katie; Perfect, Christian; and Rowlett, Peter
"A meetingplace for people who already know they like maths and would like to know more." Posts, which date back to February, 2008, have included "Podcast: Episode 2  NoelAnn Bradshaw, Newton and Leibniz"; "9 is an experimental error"; "Wolfram Alpha
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 Applied Chaos Lab (ACL)  Dr. W. Ditto; Georgia Tech University
The ACL covers a broad range of analysis and application of chaotic behavior and related phenomena. Much of the research is done in conjunction with researchers at other universities and extends into biophysics and other interdisciplinary areas. Researchers
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 apstat  The College Board, Math Forum
A list for prospective teachers and others involved in the development of the Advanced Placement Statistics Examination. Read and search archived messages.
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 arbitrarilyclose  Annie Perkins
Blog by a secondary math teacher in the Minneapolis Public Schools for whom the phrase arbitrarily close "encapsulates the things I can control, the things I cannot, the impossibility of this craft [of teaching], and the beauty of the exploration despite
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 Area Of A Circle  Kuldeep Kaur
Lessons and worksheets to find the area of a circle. Kaur has posted stepbystep instructions through this blog, which dates back to December, 2011.
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 Arithmetic Village  Kimberly Moore
Arithmetic Village introduces number placement, addition, subtraction, multiplication, and division through storybook characters Polly Plus, Linus Minus, Tina Times, and King David Divide. arithmeticvillage.com, which accompanies the author's rhyming
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 The Art of Problem Solving  Richard Rusczyk
An online school and community, with a message board and widely used textbooks, e.g., The Art of Problem Solving by Sandor Lehoczky and Richard Rusczyk. See, in particular, the AoPS's Math Jams, guided improvisational problem solving sessions. Also, learn
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 Ask a Mathematician / Ask a Physicist
"Your math and physics questions answered." Blog posts, which date back to October, 2009, originate from questions posed via email, at the duo's stand at Burningman, in person by friends, or "this one time in Union Square": "How do I find the love of
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 Assignments and Mathematical Musings from Mr. Kirk  Benjamin Kirk
Blog by a math teacher at Ithaca (New York) High School and adjunct instructor at Tompkins Cortland Community College (Dryden, NY). Since February, 2010, Kirk has blogged "as my primary means of communicating with students and parents outside of class,"
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 Authentic Inquiry Maths  Bruce Ferrington
Blog by an Australian teacher who advocates Tedious Repetitive Activities Involving Number (TRAIN) for the Genuine Application of Mathematical Experience (GAME). Posts, which date back to April, 2012, have included "Top 10 Maths Songs," "Maths and Making
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 The Bad Maths Pool  Danny Nicholson
A UK teacher trainer's Flickr photo group "for all those images of crazy special offers and examples of things that just don't add up." Pictures, which date back to August, 2010, primarily consist of retail advertisements gone wrong with bulk discounting,
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 Barry Garelick, Author at Education News  EducationNews
Articles by Garelick, who teaches middle and high school math in California, have included "The Myth About Traditional Math Education," "Fran, Henderson & Pingry, and Me: A Tale of Problems vs Exercises," "Mathematics Education: Being Outwitted by Stupidity,"
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 Baseball Heat Maps  Jeff and Darrell Zimmerman
Heat maps, Loess curves, Pitch F/X and Retrosheet downloads: actual vs expected home runs; home run and fly ball distance leaders; total batted ball distance; ground ball and line drive pull percentages; batter swinging or looking strike zone; batter
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 Becoming the Math Teacher You Wish You'd Had  Tracy Zager
Blog by a math teacher in Maine. Posts, which date back to October, 2014, have included "The Structure of Popovers," "Elementary Teachers as Math Learners," "Making Sense," "The Same Amount of Tall," and "Maya and Daphne Find Math in Their World."
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 BetterExplained  Kalid Azad
Discover and share the "intuitive insights that make complicated ideas simple. Our 'ahha!' moments are different, and that's ok. There's no single way to explain an idea...." Preferring the construction of maps over the memorization of directions, the
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 Beyond TERC  Linda Moran
Share constructive ideas with other parents and seek advice from Linda Moran, a licensed math teacher and author of the Beyond TERC lens and the Beyond TERC blog.
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 Beyond Traditional Math
Blog by a teacher who "was appalled to be handed a math book in which all instruction was whole group," and who subsequently "went on a mission to change and move beyond that traditional model of math in the elementary classroom." Subtitled "Fostering
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 BizMo Diaries  Kirby Urner
"On the road with global data." This open source developer's blog, which dates back to January, 2005, has included posts on math education, such as "Python for GIS Experts," "Memo to Gnu Math Teachers," "Playing with Blocks," "Story Problems," "Mathematics
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 Blog of a Math Teacher
A newly minted math teacher reflects on going back to school, the first day of practice teaching, state certification, job hunting, the interview, and more. With archives dating back to July, 2003.
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 Blog of Science  Pierre Far
A blog started in December, 2005, by a bacterial geneticist to "write about the latest scientific discoveries, explaining them in terms everyone can understand." Far favors topics that "affect people," so blogsci.com tends to feature health and medicine
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 Blog on math blogs  American Mathematical Society
A blog by "two mathematicians touring the mathematical blogosphere." Posts, which date back to April, 2013, have included "Binary Bonsai and Other Mathematical 'Plants,'" "Building the World Digital Mathematical Library," "On Pregnancy and Probability,"
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 Bootstrap
Providers of formal CS education to girls and underrepresented students in grades 612. Bootstrap's free materials include a nineunit algebra course that applies mathematical concepts and programming principles to the creation of a simple 3character
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 BorschtWithAnna  Anna Blinstein
Blog by a Bay area middle and upper school mathematics teacher "working on problembased inquiry, collaborative learning environments, interdisciplinary connections, and rigorous, deep, mathematical understanding." Posts, which date to May, 2012 —
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 Bowman in Arabia  Bowman Dickson
Blog by a teacher of calculus and AP Calculus at King's Academy (Jordan) who "believes in optimism and enthusiasm above all else." Posts, which date back to August, 2009, have included "Maybe I'm starting to become more Jordanian"; "But my son told me
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 Bridging Math  Jennifer Bell
Blog by a K5 math coach in the Pacific Northwest. Posts, which date back to July, 2015, have included "#TMC15 Recap," "K12 Fraction Fun," "Choral Counting in Kindergarten," "#OML16 Recap," and "Number Talks and #ObserveMe." Elaborating on the name of
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