 At Right Angles  Azim Premji University
Journal of math pedagogy and educational technology published since 2012. Issues come out in March, July, and November, with sections such as "In the classroom" (ITC) and Problem Corner, as well as topical features, book reviews, pullouts, and more.
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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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 Automated Geometry Java Applet Generation  Saltire Software
Prototype automatic generation of Java Applets from a constraintbased geometry description. Examples: geometry applets (angles on a chord, similar triangles, angles between parallel lines, two right kites, perpendicular bisectors of a right triangle,
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 The Aztec Calendar: Math, Geometry, and Design  Charles William Johnson
A site that explores the relation between the mathematics of ancient reckoning systems, expressed in historically significant numbers (cited in the historical record), and designs within the geometry of ancient artwork. The complexity of design within
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 Azulejos Que Ensinam  Museu Nacional de Machado de Castro
Catálago sobre uma coleção de azulejos que mostram Os Elementos de Euclides e otras figuras de matemáticas.
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 Bagatrix Mathematical Software  Bagatrix Solutions, Ltd.
Commercial software that features stepbystep solutions to userentered problems, with prompting. Titles include: Solved! Studio (comprises Basic Math, PreAlgebra, and Algebra titles), Algebra Solved!, PreAlgebra Solved!, Basic Math Solved!, Graphing
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 Baker's Choice  Key Curriculum Press
An Interactive Mathematics Program (IMP) unit for replacing about three weeks of student practice with graphs and equations in a traditional algebra, advanced algebra, or even geometry or precalculus class. Purchase teacher's guide and student materials.
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 Basic Ideas in Greek Mathematics  Michael Fowler; University of Virginia
Lecture notes from a course entitled "Galileo and Einstein." Nailing down the square root of 2. Zeno's paradoxes: Achilles and the tortoise. Proving an arrow can never move  analyzing motion, the beginning of calculus. How Archimedes calculated Pi to
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 Basic Mathematics  Jetser Carasco
Short, instructive articles that explain fractions, ratio and proportion, number theory, basic geometry, graphs, decimals, percents, and some algebra. This site, created by a math major who has taught high school math since 2008, also offers free math
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 The Basic Math Quick Reference Handbook  Pete Mitas
This handbook, written by an experienced math teacher, lets you quickly look up definitions, facts, and problem solving steps. It includes over 700 detailed examples and tips to help someone improve
their mathematical problem solving skills. The web
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 Basic Terms  Mark Motyka, Math League Multimedia
Definitions and illustrations of basic geometric terms: lines, points, intersection, line setments, rays, endpoints, and parallel lines.
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 BasketMath Interactive  Robert Cummings, Science Academy Software
Science Academy Software's BasketMath online interactive application drill and practice site offers autoscoring questions in arithmetic, rounding and writing numbers, order of operations, factoring, adding or multiplying signed numbers, calculating perimeter
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 A B Cron Portal  Auston B. Cron
GeoGebra applets by a teacher who has taught high school and early college students since 1970, and uses his dynamic geometry animations and interactive sketches in his classes to teach angle sums; perimeters and areas of rectangles and squares; reference
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 Beacon Learning Center  Beacon Learning Center
Beacon Learning Center is an online educational resource and professional development center funded through a grant from the U. S. Department of Education, 20002005. The resources posted in the Beacon database are products of professional development
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 BeiupMathsBacBrevet  Davy Rigaux
Maths, exercises, lessons, forum, chat... all in French.
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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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 A Bibliography of Mathematics Education  Paul Ernest, University of Exeter, U.K.
A 1994 electronic bibliography prepared for students at the University of Exeter, U.K. Contents: Society, Diversity And Mathematics Education; The Learning Of Mathematical Topics; The Psychology Of Learning Mathematics; Teaching Approaches And Resources
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 Bicycle Tracks (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Students are to discuss passage from a Sherlock Holmes story, The Adventure of the Priory School (by Arthur Conan Doyle): 'This track, as you perceive, was made by a rider who was going from the direction of the school.'...
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 Biglearners  Biglearners LLC
Thousands of math worksheets, organized by grade. Subscribe for answer keys and unlimited access free of advertisement.
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 Billiards in the Round  Ivars Peterson (MathLand)
On a level, rectangular table, a practiced billiard player can return the balls to their original positions, repeat a shot, and obtain an identical result. The geometry of the table, however, can greatly influence the types of motion possible in a game.
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 BitArt  Robert J. Krawczyk
Illustrated introductions to spirolaterals and strange attractors. See a selfrunning demonstration of a variety of spirolaterals, or generate one of your own and see all the reversals. The link of current exhibits lists installations showing strange
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 B.J. Pinchbeck's Homework Helper  Bruce P. Pinchbeck and B.J. Pinchbeck
In 1996, when he was 10, B.J. (and his father) began compiling links to educational websites. The site has grown to conclude hundreds of sites that will help you with your homework, including a page of annotated sites for math and another for computer
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 Bookfill Publications  C. J. Davis
Algebra and geometry workbooks formatted to facilitate writing all answers directly onto the book. These books, for Year 10 and Year 11 students who require GCSE maths revision, cover general Foundation and Higher level topics.
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 Books: Professional & Technical: Professional Science: Mathematics  Amazon.com
Browse bestselling math books from the Professional and Technical Bookstore at Amazon.com, in such categories as Applied; Chaos & Systems; Geometry & Topology; Mathematical Analysis; Mathematical Physics; Number Systems; Pure Mathematics; Transformations;
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 Boomerang (SMILE)  Wilhelm L. Lilly, Kenwood Academy High School
A lesson for grades 412 designed to teach students to estimate angles in degrees and distances in feet or meters; collect data and analyze a histogram; and (optionally) study gyroscopic precession and aerodynamics. From the Recreational and Creative
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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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 Bottles in a Wine Rack  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Arranging wine bottles in a rack leads, under certain circumstances, to a curious mathematical problem discussed in books by S. Wagon and R. Honsberger. The site arouse out of an attempt to illustrate their solution. The dynamic illustration quickly
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 Bowland Maths  Bowland Charitable Trust
Case study problems and lessons designed to develop thinking, reasoning and problem solving skills in UK math pupils ages 1114. In particular, download series of standalone assessment items that challenge students to estimate the number of descendants
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 BrainBashers  Kevin Stone
Five math or logic challenges on a page, each with clickable hints and solutions. For games, visit http://www.brainbashersgames.com/.
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 Brain Boosters  Discovery Education
An archive of challenging puzzles, organized under: Categorization, Lateral Thinking, Logic, Number and Math Play, Reasoning, Spatial Awareness, Word and Letter Play.
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 BrainPOP Math  BrainPOP, LLC
Short animated films that are simple and easy to understand on elementary mathematics, as well as health, science, and technology. Films often accompanied by quizzes.
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 Brilliant
Weekly Olympiadstyle challenges that offer "rigorous, competitive, whimsical, and edifying" problem sets in math and physics. Register to explore the Brilliant Techniques Trainer's practice exercises; answer correctly to earn points redeemable for lanyards,
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 bugman123.com  Paul Nylander
Tessellations, gear spheres, hyperbolic geometry, fractals, hypercomplex fractals, minimal surfaces, and more original mathematical artwork. See also Nylander's simulations of physics phenomena such as the magnetic field of a solenoid, 2D waveparticles,
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 Build a Recreation Center Using Geometry  Gwen Neuberger, Community High School, West Chicago, IL
"Our geometry class is being asked to design a recreation center for the children of West Chicago. Money is no object. The class will be divided into groups of approximately four students." The site includes a lesson plan and scenario, as well as pages
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 Building Homes of Our Own  National Association of Home Builders (NAHB)
An interactive teaching tool for the middle and high school classrooms. The simulation presents a macro view of the entire home building process, from site selection to final sale. Students collect information, solve problems and make choices as they
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 Build Your Own Blocks  Mönig, Jens; Harvey, Brian
Turn, move, animate, and iterate figures with this visual programming language, which also lets you draw simple and complex fractals through recursion. Download Build Your Own Blocks (BYOB); watch tutorials; report bugs; and more. Originally designed
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 Butterfly Station  Manfred Ullman
Applets for exploring spirographs, pendula, the Mandelbrot set, and Lorenz attractors.
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 The Butterfly Theorem  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Ten proofs (and a few variations) of the beautiful Butterfly theorem, with illustrations and remarks. Links to some generalizations: A Better Butterfly theorem, 2NWinged Butterfly theorem, several pages on the Two Butterflies theorem. Several of these
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 Buzzmath  Scolab Inc.
Website and mobile application for learning and practicing middle school mathematics skills. Buzzmath promotes mastery through immediately detailed feedback and randomly generated values that allow learners to retry missed problems. Register for student
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 C26: Geometry  Scott Thatcher; Dept. of Mathematics, Northwestern Univ., Evanston, IL
Syllabus for a Geometry course, with some solutions to problems in PDF format; Maple worksheets (version 4) for multivariable calculus.
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 Cabri en Physique  Yves Cortial
Cabri en Physique propose près de 140 figures créées avec le logiciel de géométrie dynamique Cabri Géomètre dont une centaine d'animations en version CabriJava: d'illustrations de phénomènes
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 Cabri Geometry: Classroom Resources  The Math Forum
The Math Forum's page of links at the Forum and on the Web to dynamic interactive geometry classroom resources for Cabri Geometry. Books and Web sites; Frequently Asked Questions; exploring the basics; workshops; excerpts from the journal abraCAdaBRI;
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 Cabri Java Applets  Jenchung Chuan
Well over one hundred applets based on Cabri drawings.
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 CabriJava  JeanMarie Laugier; L'Université de Provence (AixMarseille I)
Optique, électicité, mécanique. CabriHop: Une série de constructions d'optique géométrique et physique, niveau lycée et un peu +, à visiter en premier pour les paramétrages de votre navigateur,
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 Cabri Java Project/Projet CabriJava
CabriJava allows you to create dynamic geometric figures using Cabri and publish them as Java applets. In English and French.
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 Cabri Jr.  Texas Instruments Incorporated
Interactive geometry for the calculator: construct, analyze, and transform mathematical models and geometric diagrams. Cabri Jr. imports and exports figures from Windows computers. Take a tutorial, preview and download weekly activities, or browse the
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 Calc3D  Andreas Greuer
Calc 3D is a free program for calculating 3dimensional vectors, matrices and
complex numbers with Windows 95/98/NT. Cartesian coordinates, spherical coordinates und cylindrical coordinates can be transformed into each other.
Distances, intersections,
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 Calculatorium  Nenad Mitrovic
JavaScript calculators for determining area, perimeter, surface area, volume, trigonometry, algebra, statistics, finance, conversions, health, and more. See also Calculatorium's timed, autoscoring tests and typeset formulas.
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 Calculators OnLine Center: Part II  Mathematics  Martindale's Reference Desk
Over 7,420 calculators for: Unit Conversion (Time, Distance, Length, Speed, Weight, etc.); Abacus; Basic Math; Complex Mathematics; Complex Math Education; Complex Math Calculators by Specialty: Algebra and Linear Algebra; Algorithms; Calculus; Central
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 Calculus in Motion  Audrey Weeks
Geometer's Sketchpad animations of mathematical concepts from middle school through high school. Three products are offered: Calculus in Motion (161 animations Including animations of 20091997 AP Exam AB & BC Free Response Questions); Algebra in Motion
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