 MathWorld Interactive  Carolynn S. Mortensen
Openended word problems and some answers from this nowdefunct project. MathWorld began as MathMagic FidoNet in 1991, and was dedicated to helping educators and parents motivate their students to solve openended word problems, communicate mathematically,
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 MathXL  Addison Wesley Longman
A Webbased tutorial system based on Addison Wesley math texts. For PCs running Windows 95, NT, 98, or 2000. MathXL offers practice tests correlated to the chapter tests in your book; personalized study plans, based on your test results, that list the
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 MathXpert: Software to Help You Learn Mathematics
MathXpert helps students learn algebra, trigonometry, and onevariable calculus by supporting their development of stepbystep solutions. For Windows or Windows emulators. Also available from http://www.mathxpert.com/.
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 Mathy McMatherson  Daniel Schneider
Blog by a public high school teacher in Tucson, Arizona, who graduated from the University of Arizona Secondary Mathematics Education Program. Posts, which date back to July, 2011, have included "Teaching as Creation," "Fixing Bugs Part 2: Algebra &
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 matthen  Matthew Henderson
"Things of interest in maths & science" created by a PhD candidate in Statistical Dialogue Systems who majored in mathematics as an undergraduate. Posts date back to March 2011, and routinely feature Henderson's original animated gifs: "Orbits around
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 Maxima: a GPL CAS based on DOEMACSYMA
Free, opensource computer algebra software. Extensive notes for users and programmers, and a bugreporting system, available here.
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 McSquared  Audrey McLaren
Blog of "a teacher's realtime journey into Web 2.0" for "anyone who loves to teach, loves technology but feels easily overwhelmed by it, nevertheless feels compelled to learn how to use it, needs things explained real slow like, is not afraid to ask
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 Media4Math
Free algebra and geometry videos, PowerPoint presentations, Promethean Flipcharts, critical thinking activities, workedout examples, and other media resources. An initiative of Emmy awardwinner Edward de Leon, executive producer of "Greatest Inventions
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 Median  Don Steward
Blog by a maths teacher influenced by Hans Freudenthal. A fan of unicase, Steward teaches 1016 yearolds in Shropshire (UK). His posts, which date back to November, 2007, have included "loooooong multiplication  grid method," "two reversal problems,"
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 MERLOT Mathematics Portal  MERLOT (Multimedia Educational Resource for Learning and Online Teaching)
Free highereducation online teaching materials, and a user community centered around those materials. Free registration allows users to create, contribute, collect, and comment on resources, or become a peer reviewer or guest speaker. The site offers
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 MiLearn High School Course Complements
Curriculumbased high school level math resources in an interactive, "concept, example, application" web design. Courses contain over 500 web pages of stepby step examples and solutions; free demos are available on the site. MiLearn also provides consulting
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 Modern Math  Taoufik Nadji, Malek Physix Inc.
Mr. Taoufik Nadji's precalculus students at Interlochen Arts Academy introduce modern mathematical topics: fair division (methods: dividerchooser, lone divider, lone chooser, last diminsher, markers, sealed bids); graph theory (applications, terms,
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 Modules de mathématiques  Gilles Desbiens; Centre collégial de formation à distance (Québec, Canada)
Révision des notions acquises au secondaire, avec la collaboration du Groupe Vidéotron ltée. Ensembles et fractions; exposants et factorisation; équations et inéquations; fonctions algébriques, équations
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 Mr. Hoffman's Home Page  Jim Hoffman
Assignments, notes, exams and interactive vocabulary quizzes (with answer keys) from Hoffman's own math and twodimensional computer animation high school classes. These materials are based on Saskatchewan Provincial Curriculum, and include Math 9, Math
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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. Cantey  Susan Cantey
Resources for precalculus and calculus, from a teacher at Walnut Hills HS in Cincinnati, Ohio. Advice, information, practice problems, quizzes, and more.
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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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 Mr. Talbot's Mathematics Page  Roger Talbot; Detroit Catholic Central
Problem of the week (Algebra 2, Precalculus and Calculus), solutions to the 1999 AP Calculus BC Exam, and a selection of sample tests, quizzes, worksheets, labs, and links.
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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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 National Curve Bank  Gray, Venit; California State University, Los Angeles
Animation and interaction, and geometric, algebraic, and historical aspects of curves. Topics include Calculus, PreCalculus, History of Math, Limits, and Fractals. Submissions are encouraged.
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 NCTM San Diego Sessions on Calculus Reform  The Math Forum
A selection of summaries of presentations from the 74th Annual NCTM Meeting, 2528 April 1996, San Diego, CA: The NSF Math Modeling/Precalculus Reform Project: Functioning in the Real World, by Sheldon P. Gordon and Florence S. Gordon; Derive, Powerpoint
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 NCTM Standards (Standards 2000)  National Council of Teachers of Mathematics (NCTM)
NCTM's Principles and Standards for School Mathematics is the compilation of the lessons learned and experiences gained over the years since the 1989 Standards were released. The site features include: an online version of the Standards (including illustrations,
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 NECTAR Foundation: New Era Classroom, Technology and Research
A nonprofit foundation specialising in the development and marketing of educational software in the kindergarten to grade 12 program with a focus on mathematics software programs. It also develops and markets print, video, and audio materials for students
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 New York Regents Exam Prep Center  Oswego City School District
A site dedicated to assisting high school students in preparing for the "new" New York State Math A Regents Examination. Covers Algebra, Geometry, and Algebra II/Trig. The materials featured for each topic include: general review/formula sheet, Regents
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 The North Carolina State High School Mathematics Contest  John Goebel
Download PDFs of recent contest questions and solutions, and see test statistics and item analysis. Read brief and detailed histories of the contest, rules, and more. The State Mathematics Contest was initiated in 1979 to provide state level competition
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 NSDL Middle School Portal: Math Pathway  NSDL; the Ohio State University
A middle school portal into NSDL's math resources, browsable by topic, or choose a preselected set of resources on given subjects.
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 The Nuffield Foundation
Math teaching and learning resources include freely downloadable Freestanding Mathematics Activities (FSMAs) and Applying Mathematical Processes (AMP) activities, a mix of investigations and practical explorations. The Nuffield Foundation works to improve
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 Numb3rs Math Activities  Cornell Department of Mathematics
Notes and activities on the mathematics behind each CBS television broadcast of the FBI crime series NUMB3RS, from the pilot episode through season five: Uncertainty Principle, Sniper Zero, Dirty Bomb, Assassin, Toxin, Backscatter, Two Daughters, Burn
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 The Numerist  Shaun Klassen
Math tutorial posts by Klassen, who majored in biochemistry and holds a Master of Science degree specializing in medicine. "Explanations of as many math concepts that I can think of" include Finding the Slope of a Line," "Introduction to Functions," "The
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 Nummňlt  Maurici Carbó Jordi
Java applets: an area "workshop," which explains area and division by converting numbers in area units; an architect's toy blocks, with gravity; connecting and programming elementary logic (in the form of pipes with light bulbs signifying true sentences);
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 Nummòlt  Maurici Carbó Jordi
Math teaching resources built by architects include base 10 block manipulatives; a block construction toybox; a logic construction toybox; an area workshop; and MathCats balance. See, in particular, Nummòlt's openended obbl & math toys: adding
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 One Mathematical Cat, Please! A First Course in Algebra  Carol J.V. Fisher Burns
This is a complete online Algebra I curriculum, along with lessons in geometry, algebra II, and calculus. Over 150 web exercises, all typeset in MathJax and some of which use GeoGebra, with printable randomlygenerated worksheets and solutions, offer
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 One, Two.. Infinity  Marian Small
PDFs of presentations from the professional development consultant and author of Making Math Meaningful to Canadian Students K8, More Good Questions: Great Ways to Differentiate Secondary Mathematics Instruction (9  12), Eyes on Math: A Visual Approach
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 Online Function Grapher  David Bloom
Interactively plot trigonometric functions, inverse and hyperbolic trigonometric functions, logarithm and natural logarithm (ln), square root, and other special functions such as min, max, absolute value.
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 Online Lessons Using Streaming Video  Your Other Teacher.com
Tutoring via streaming video and online tutors (using whiteboards). Free samples available. The math section includes arithmetic, prealgebra, factoring for algebra students, algebra 1 and 2, word problems, CAHSEE (California High School Exit Exam), introduction
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 Online Math Calculator
This collection of free online calculators includes a scientific calculator that accepts inputs of entire matrices and equations, calculates derivatives, and plots functions. Onebutton unit conversion calculators convert between Celsius and Fahrenheit,
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 Online Math Help for All  Ramachandran Seerangan
Primers and problems, a math dictionary, worksheets organized by grade and concept, and more. See in particular Seerangan's YouTube channel, where he posts narrated whiteboard videos of stepbystep solutions to specific problems.
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 Online Math Tests Home Page  Elias Saab
This site has problems that help sutudents get ready for College Alegbra or Calculus. It also has problems in Geometry and Trigonometry. All the problems have complete solutions that are given when one hits the submit button. Tests covered include: MPE410,
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 Online Tutor: Math, Science, Computers, Etc.  Morris Roth
Online tutoring in math, physics, chemistry, biology, computer languages, English, and French. Inperson tutoring in Tulsa, OK.
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 .oO worksheeps  Felix Heckert
Generate worksheets of customized math exercises, complete with solutions: basic operations with integers, negatives, and fractions; binomial and quadratic formulas; partial roots; percent calculation; curve sketching; metric; derivations; antiderivatives;
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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 Middle  Johnson, Nanette; and Kaplinsky, Robert
"Open middle" problems, hints, and answers, all aligned to the Common Core State Standards (CCSS). Introduced by Dan Meyer, these kinds of math challenges have a "closed beginning," meaning that they all start with the same initial problem; a "closed
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 The Oxford Math Center  Emory University
Searchable notes, practice and review exercises with solutions, proofs, technology tips for TI graphing calculators, connections, examples worked at a virtual chalkboard with narration, and more resources for learning precalculus, calculus, statistics,
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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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 PBS Teachers: Math  PBS Teachers
The Public Broadcasting System's Math Service, combining computing and telecommunications technologies to offer interactive data services and interactive video and voice services for education based on the NCTM Standards. The site features: resources,
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 Personalized Programming Service Inc.
Educational software for teachers and students. Topical software in Math, English, Social Studies, and Science, as well as Quizmaker and Testmaker programs. Download demos and upgrades, browse the products, or order on site.
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 Physicscatalyst
Study notes, videos, formula sheets, solved examples, solutions from India's National Council of Educational Research and Training (NCERT), and more for middle and high school maths.
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 Planetcalc  Anton Egoshin
More than a hundred free calculators on math topics ranging from area of a triangle by its coordinates to total squares (the number of squares in given rectangles). Categories of others include date and time, health, computers, engineering, finance, navigation,
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 Plot Graphs  Philipp Wagner
Plot multiple two or threedimensional graphs, including of parameterized functions and derivatives, in one and the same graph. Key in equations with the WYSIWYG formula editor.
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 Polynomials Calculator  Xavier R. Junqué
These online and downloadable calculators for basic math and polynomial operations handle matrices and output their inverses, determinants, eigenvalues, eigenvectors, cofactors, adjoints, transposes, Jacobians, and Jordan forms; calculate derivatives
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