 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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 Database of Number Correlations  James Barton
Partitionings, prime factorizations, polygonal numbers, and other data about each of the numbers one through one thousand, as well as connections to "various material and occult phenomena." See also Barton's magic square that has interesting prime factor
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 David Royster's Home Page  Dept. of Mathematics, Univ. of North CarolinaCharlotte
Research and Scholarly Interests  Papers: Algebraic and Differential Topology; Use of Computer Algebra Systems in Mathematics Education. See also MAED 3103, a course for Secondary School mathematics teachers covering material drawn from Algebra I and
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 Davitily Math Problem Generator  Nguyen, Ly; and Pardue, David
Create worksheets and tests, including options for multiple choice, printable versions, and answer keys. Click to insert preworded questions in basic math, algebra, and geometry, the parameters of which vary randomly. Requires JavaScript. Also available
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 Demos with Positive Impact  David R. Hill and Lila F. Roberts
A collection of classroom demonstrations that use some form of instructional technology. The authors invite others to submit demos and provide them with feedback on the demos already collected. Demos are organized under the levels of Pre Calculus, Calculus
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 Desafios Matemáticos  Paulo Ferro
Cinco desafios novos cada mês. Ferro, um professor de matemática licenciado pela Universidade de Coimbra, tambem oferece demonstracões de geometria dinâmica, jogos matemáticos, biografias de matemáticos, exames
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 Descriptive Geometry  Petr Plavjaník
Software for creating and printing drawings, including conic sections, color fillings in Monge's projection, and axonometry. In English and Czech.
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 Developing Geometry Concepts Using Computer Programming Environments (iMath Investigations)  Illuminations; National Council of Teachers of Mathematics (NCTM)
An online, interactive, multimedia math investigation. Computer programming environments can be used to help children understand geometric concepts. The interactive tool in this iMath investigation illustrates how LOGO can be used to foster creative
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 The Diamond Theorem  Steven H. Cullinane
Finite projective geometry explains the surprising symmetry properties of some simple graphic designs  found, for instance, in quilts. Links are provided for applications to sporadic simple groups (via the "Miracle Octad Generator" of R. T. Curtis),
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 Digital Mathematical Performance  Gadanidis, George; Borba, Marcelo; Hughes, Janette; et al.
Watch video, liveacted dramatic storyboards, and animations of how people "perform" mathematics: Flatland, "Help Me, Fermi," Should Parallel Lines Never Meet," "The Pleasure of Making 10" (linear equations), "The Waiter" (the missing dollar problem),
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 Digital Math  Santa Barbara County Education Office
A site to assist Algebra I, Grade 7, and Grade 6 students, their parents, and educators with the California State Mathematics Content Standards. Log in for Quicktime that provides stepbystep instruction to solve problems aligned with the mathematics
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 Discovering Geometry Newsletter  Key Curriculum Press
A free biannual publication providing information and teaching techniques for The Geometer's Sketchpad software package, the Discovering Geometry Newsletter is a resource for those interested in geometry and technology education. Download PDFs of past
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 Discovering the Art of Mathematic  Fleron, Julian, et al.
Resources to help mathematics faculty teach the subject to liberal arts and humanities undergraduates by actively involving them in authentic mathematical experiences that "provide meaningful cognitive and metacognitive gains, and nurture healthy and
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 Disfruta Las Matemáticas  Rod Pierce, mathsisfun.com
Spanish language version of Maths is Fun.
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 Dividing The Plane  Jim Loy
A line divides the plane into two pieces (regions). Draw another line. The plane is now divided into three or four regions. It is three regions if the lines are parallel, four if they intersect. A third line divides the plane into seven regions. Find
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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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 donalduncan's Channel
Narrated paper and pencil instructional videos  some, specific to British Columbia's Foundations of Math and Precalculus exams  on number, line segments and lines, rational expressions, factoring, quadratic functions, functions, exponents, polynomials,
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 Downloadable Articles, Papers & Materials  Michael de Villiers; Mathematics Education, Univ. of DurbanWestville, South Africa
Articles by Villiers related to geometry and geometry education some in PDF format, including: An Extended Classification of Quadrilaterals; A Mathematical Treasure Hunt; Place Kicking Locus in Rugby; Sketchpad Solutions and Results; A Dual, and Generalizations,
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 Downloads  Mac  Mathematics  CNET Download.com
Search this site to find a particular piece of software for the Mac, or browse their mathematics listings.
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 Downloads  PC  Mathematics  CNET Download.com
Search this site to find a particular piece of software for the PC, or browse their mathematics listings.
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 DPGraph (Dynamic Photorealistic Graphing)  David Parker
Software that allows you to: display multiple simultaneous dynamic photorealistic 3D implicit equalities and inequalities, and intersections of their volumes; spin, slice, and view timedependent (moving) photorealistic surfaces in real time; and construct
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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 a Crop Circle  IES Ramon Cabanillas (Cambados, Pontevedra, Spain)
To draw a crop circle, the high school students at IES Ramon Cabanillas (Cambados, Pontevedra, Spain) calculated ellipses and discovered the pentagram's relation to the golden mean. This website details their designs, practice, calculations, and final
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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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 Dr. Genius  Hilaire Fernandes
Dr. Genius: "Geometry Exploration and Numeric Intuitive User System." The successor of the Dr. Geo Project, this GNU interactive geometry software allows the construction and manipulation of geometric figures. Read documentation, subscribe to the mailing
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 Dr. Math Books  the Math Forum @ Drexel
Featuring Internet references, glossaries, indexes, illustrations, and questions written by actual kids, each can be purchased from Amazon.com via links on this page. The page details the contents of each book: Dr. Math Gets You Ready for Algebra, Dr.
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 Duke University Math Union  Jadrian Miles
The Duke University Math Union (DUMU) writes and hosts the annual Duke Math Meet. Download PDFs of problems and solutions from meets dating back to 1998.
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 Dynamic Mathematics Visualization for Young Learners
Sketchpad in Grades 38  a working conference, held at the University of Illinois at Chicago in February, 2003. Researchers, curriculum developers, and educators began developing a curriculum and software structure around The Geometer's Sketchpad technology
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 EasyCalculation.com
Free online mathematics converter, calculators, and other tools for numbers, unit conversions, hexa conversions, decimal conversions, binary conversions, area, trigonometry, analytical geometry, algebra (e.g., group work, Bernoulli inequality, Venn diagrams
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 EdPlace Maths  EdPlace
EdPlace Maths is a is a registered Curriculum Online subscription website that offers over 2000 interactive and printable maths worksheets for KS1 through KS4. Free samples available; paid subscriptions allow users to generate new problems for each worksheet
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 Educação Matemática e Novas Tecnologias  Gravina, Barreto; Universidade Federal do Rio Grande do Sul (UFRGS)
Discusses new technologies as resources for the learning of Mathematics:
software descriptions, lesson plans, articles. In Portuguese.
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 Education: Mathematics  The Mining Company
Web resource lists of sites: see sciences  physical/computer and, beneath, mathematics by Kristin Matherly, with links to sites "in the spotlight" and topics: Algebra; Applied Math; Books; Business Math; Careers; Calculus; Communities; Competitions;
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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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 Eduss  Eduss Broadcast & Media
A commercial tutoring program in Math, English, and Phonics for grades 17. It features randomlygenerated exercise sets and questions; subject testing; evaluation and reporting to student, parent, or teacher; and feedback on performance and achievement.
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 EduWare  EduWare, Inc.
Eduware Software lets teachers create exams for any subject or from test banks of Regents questions for Science, Social Studies, Foreign Languages, and Math, using the Wizard Test Maker program. Math subjects include logic, algebra, geometry, the coordinate
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 EduWizardS
Math tutoring and homework help service. Review the educational background, experience, fees, and ratings of tutors, then book a session with voice chat, whiteboard, and textchat. Tutors adjust lesson pace "to a student's ability and guide them where
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 Edwards  Clayton Edwards
Problems, lessons, units, and "starters" by a middle grades math teacher who believes in differentiation and "using a mixture of traditional and reform methods to solidify understanding and engage mathematical minds": integer operations, order of operations,
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 Eggbrain Productions  John P. Perna
A Flash website where young people can test themselves on a variety of subjects,
especially mathematics. Interactive quizzes on basic operations, basic algebra, fractions, simple geometry, etc.
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 Eighth Grade (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering basic arithmetic concepts and methods, for eighth grade.
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 Ejercicios Resueltos de Matemáticas  Sergio De Los Santos
Ejercicios resueltos para bajar (en forma Excel): Fórmulas, Aritmética; Álgebra; Trigonometría; Geometría analítica; Cálculo, Estadística, y Física.
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 Ejercicios y Problemas de Matemática  Pablo Mateus
Ejercicios y problemas de números (natural, entero, racional, real), estadística, ecuaciones, funciones, análisis combinatorio, probabilidad, trigonometria, geometria, y más. También, um glosario y consejo sobre pruebas
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 Elementary Math Enrichment  Beth Schaubroeck
Free mathematics enrichment materials for accelerated 4th and 5th graders. The 70 lessons, grouped into 12 different units, include solutions and teacher guides: Ancient Mathematics (Mayan math, in base 20; and Egyptian math, which lacks zero), Baseball
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 Elementary Problem of the Week  Department of Mathematics, Southwest Missouri State University (SMSU)
Word problems in number patterns, algebra, geometry, and other topics. Read the solution to the most recent problem, and archives of previous problems and their answers.
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 Elementary Problem of the Week  Math Forum
A project designed to challenge elementary students with nonroutine problems and to encourage them to verbalize their solutions. From 1995 to 2002, solutions submitted from students for the Elementary Problem of the Week were answered by Visiting Math
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 Elementary Resources: Math  Iram Khan and James Horner, CanTeach
CanTeach was created to assist teachers in finding and using resources online. The authors have emphasized lesson plans, resources, and links which have a Canadian focus. The elementary math resources are organized into these categories: numbers, patterns
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 Elevated Math  Elevated Lab Press
Instructional math videos, aligned to the Common Core State Standards (CCSS), enlivened with multiple voices as well as graphic and cartoon animation. This iPad app, which includes a whiteboard for working out math problems, comes with two lessons and
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 eMathHelp
View worked solutions to problems, or submit your own to WyzAnt.com tutors. See also eMathHelp's notes on prealgebra, algebra, calculus, differential equations, and more.
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 Emaths.Info  Vinod Sebastian
Math tools, formulas, tutorials, videos, tables, and "curios," such as the unusual properties of 153, 1729, and 2519. See in particular Emaths' interactive games, which include the N queens problem, Towers of Hanoi, and partition magic, which finds a
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 The EMPower Project  TERC
Extending Mathematical Power: A Math Curriculum for Adults, extends school mathematics reform to currently underserved populations so that they more effectively engage mathematical demands at work, at home as parents and caregivers, in the community,
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 Entersoft
Instructional videos and slides for sale: Central Board of Secondary Education (CBSE) 10th maths, Vedic mathematics, and more.
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