 Noise Removal from Images  J. A. Sethian
A paper and movie on noise removal. Level Set Methods exploit the fact that curves moving under their curvature smooth out and disappear. The idea is to view the pixel values as a topographic map; the intensity (somewhere between white and black) at each
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 Nonlinear Physics Group  Technical University, Darmstadt, Germany
A research group whose research areas include sonoluminescence, levitated drops, and acoustic and optically induced cavitation (view MPEG movies of bubbles!) A Java applet, Nonlinear Dynamics Online, provides visualizations of data sets: you may use
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 Nonlinear Systems Laboratory  Massachusetts Institute of Technology
A group dedicated to the analysis of nonlinear systems: list of publications (some abstracts are available online) and animations of a robot arm catching a ball and a paper airplane.
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 NOVA Online: Hunting the Hidden Dimension  Public Broadcasting System (PBS)
The PBS television series NOVA has produced a program about fractals, their impact on the world of mathematics, and the way they're shaping our understanding of nature. In addition to the program itself (in five chapters), the website offers a program
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 NOVA Online: The Proof  WGBH, Public Broadcasting System (PBS)
For over 350 years, some of the greatest minds of science struggled to prove what was known as Fermat's Last Theorem  the idea that a certain simple equation had no solutions. This site includes an interview with Andrew Wiles (the man who spent seven
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 NOVA Teachers: Featured Teacher  PBS
Teachers' featured stories of a lesson plan using one of the NOVA films. Lesson titles include: Students Inclined to Study Galileo, Exploring Research Bias, Placing Value on Maya Math, Teaching with Trebuchets, Bridges Form Foundation for Geometry Unit,
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 The Novel Polyhedra of Albert P. Carpenter  Albert P. Carpenter
A series of videos of slides exploring Exploded, Crown, Open and Lattice Polyhedra.
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 NUMB3RS  CBS Broadcasting Inc.
NUMB3RS depicts how the confluence of police work and mathematics helps solve criminal questions. Watch video clips of actors Rob Morrow and David Krumholtz on the set, as well as trailers of the television show and previews of upcoming episodes.
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 Numbercrunch  Simon Pampena
Through school assemblies and other shared learning experiences, Numbercrunch "inspires students by combining energetic standup comedy with mathematics." Believing that "doing maths takes a lot of heart (and a sense of humour)," writer and performer
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 Number Loving  Laura ReesHughes and Sharon Derbyshire
Freely downloadable PDFs, Microsoft Word documents, and PowerPoint presentations, organized by UK key stages, strands, and topics. The Number Loving blog offers new approaches for teaching maths and tips for classroom makeovers. Posts, which date back
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 Numeracy Works  David Hartmann, Numeracy Works LLC
Numeracy Works is a commercial software company which sells Tabula, a new tool for math education. Use Tabula to create, construct, cut, tape, fold, and transform. Make fold patterns, tiling patterns, tessellations, and perspective drawings. Also on
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 OberPrima Mathematik  Olaf Hinrichsen
Instructional German language math videos, browseable by klasse or searchable by keyword.
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 Off The Hypotenuse  Glenn Kenyon
Kenyon started this blog in pursuit of "a good discussion of resources, ideas, and innovative ideas for teachers of Algebra." Humorous videos, comic strips, and posts, which date back to March of 2007, have included "Math Lessons learned from Karate,"
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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 Help & Learning Resources
Learn basic concepts behind arithmetic, algebra, geometry, statistics and set theory. Includes some SAT test preparation help, math games, math worksheets, math riddles, math quotes, math mnemonics and math trivia.
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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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 Optical Data School Media
A publisher of math and science programs, including Windows on Math, an activitybased laserdisc and videotape curriculum built around the NCTM standards. Most products are for levels K8. Find Correlations for Optical Data products to a wide range of
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 Oranges Project Page  Debbie Lewis; The Levering School, Philadelphia, PA
An eighth grade project. Students use measurement to investigate the proportional relationship between the edible part of an orange and the peel or inedible part of a orange. They investigate different types of oranges such as navel, blood, and clementines
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 Organic Mathematics Workshop: The Proceedings  Borwein, Borwein, Corless, Jörgenson, Sinclair, eds.
Proceedings of a 1996 workshop held at Simon Fraser University, Vancouver, Canada. Speakers (top experimental and computational mathematicians); their articles, with equations, code, photos, videos, and annotations; and related resources and links. Invited
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 Past Lectures  Gresham College
Dozens of video lectures by Robin Wilson, Gresham Professor of Geometry and former Visiting Professor in the History of Mathematics: "The Great Mathematicians," "Early Mathematics Day," "Lewis Carroll in Numberland," "Topics in the History of Financial
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 PDK Poster Project  Pamela Davis Kivelson
"Using Visual Means to Challenge Stereotypes." Posters for scientific literacy, humanizing the image of research science and scientists, and increasing the number of women and girls who choose to pursue and maintain careers in the physical sciences and
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 Pearson Learning  Dale Seymour Publications
A leading publisher of educational materials, emphasizing math, science, and the arts. The site contains: an online catalog; math curricula include: CMP (the Connected Mathematics Project) and Investigations (Investigations in Number, Data, and Space,
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 Perimeter Institute for Theoretical Physics
An independent, nonprofit, scientific research organization working to advance our understanding of physical laws and develop new ideas about the essence of space, time, matter, and information. Located in Waterloo, Ontario, Canada, Perimeter also provides
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 The Physics of Baseball  Alan Nathan
Read about the benefits (or not) of corked bats, the differences between aluminum and wood bats, the issues involved with characterizing the performance of bats from a physics point of view, and a description of the collision between a wooden bat and
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 The Platonic Solids Information Site  Dan Radin
Information, computer graphics, a computeranimated video, teaching tools, and links pertaining to the threedimensional geometry of the polyhedron in its many forms. Radin focuses particularly on the five Platonic solidsthe tetrahedron, the cube, the
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 Plimpton 322: The Ancient Roots of Modern Mathematics  Laurence Kirby
A video documentary of our mathematical ideas from ancient cultures in the Middle East, Asia and Africa, and how they remain relevant in modern society and technology. The 33minute film includes footage of a 4,000yearold cuneiform tablet known as Plimpton
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 Polynomials  Project MATHEMATICS!, California Institute of Technology
A videotapeandworkbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Animations show how the Cartesian equation changes if the graph of a polynomial is translated or subjected
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 Powers of Ten  Bruce Bryson
A series of images based on the book Powers of Ten, by Philip and Phyllis Morrison and the Office of Charles and Ray Eames. Each picture's subject is ten times wider or narrower than the next. Images range from quarks at 1016 meters to groups of galaxies
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 Powers of Ten  Eames Office
An "adventure in magnitudes" that depicts the relative scale of the universe in factors of ten, originally written and directed by Ray Charles Eames in 1968. Starting at a picnic by a Chicago lake, every ten seconds this nine minutelong documentary short
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 Principles of Calculus Modeling, an Interactive Approach  Donald Kreider and Dwight Lahr, Department of Mathematics, Dartmouth College
Web pages that correspond to each section of the book Principles of Calculus Modeling: Modeling Discrete Data; Modeling Rates of Change; Modeling with Differential Equations; Modeling Accumulations; and Culminating Experience. With quizzes, applets, worked
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 The Private Eye  Kerry Ruef
A handson, investigative teaching approach that attempts to stimulate the wonder of looking closely at the world, thinking by analogy, changing scale, and theorizing. It uses everyday objects, a jeweler's loupe, and a series of simple questions, which
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 Professora Karolina Barone Ribeiro da Silva  Karolina Barone Ribeiro da Silva
Aulas de geometria incluem geometria esférica e geografia, geometria não euclidiana e a física, uma guia com atividades simples sobre geometria euclidiana plana, e "de Euclides a Poincaré." Veja tambem as coleções
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 Project MATHEMATICS!  Apostol, Blinn, Corrigan, California Institute of Technology
Videotapeandworkbook modules that explore basic topics in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. The
tapes use live action, music, special effects, and imaginative computer animation, and are distributed
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 Pythagorean Theorem Animated Voice Demo  Chris Beall
Animted deerivation of the Pythagorean Theorem.
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 Rebecca Newburn
Links to this California teacher's Math 7 blog, and to her professional blog, a "fusion of best teaching practices, integrating technology and increasing compassion in and outside of the classroom." See also Newburn's select compilation of explanations,
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 Recursos de Matemáticas para 2º de Bachillerato y 1º de Carrera de Ciencias  Matemáticas de Bachiller
In Spanish: Libros que puedes hojear; videos que puedes ver introducción al Álgebra de lo Lineal, introducción al Cálculo Diferencial, introducción al Cálculo Integral, ejercicios de examen de Selectividad, Know How; Detector de Pardillos Matemáticos;
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 Reflections  National Council of Teachers of Mathematics (NCTM)
Reflections, NCTM's videobased, professional development Web site, is designed to help teachers—individually and collectively—examine their teaching of mathematics. By integrating lesson videos, pre and postlesson discussions, student work, and reflective
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 Resampling Stats
Resampling is a statistical method of drawing repeated samples from the given data to determine the value of a parameter of interest. Resampling Stats is a computer program offered for sale (30day free trial, discount for personal or academic use). The
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 Research Ideas  George Gadanidis
Disseminating math education research through performance, and studying the process and impact of research performance. Funded by the Fields Institute, Random Acts of Math brings math ideas to young children and their parents. Music videos of the Math
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 Research in Geometric, Symbolic and Scientific Computing  Dept. of Computer Science, Univ. of North CarolinaChapel Hill
Research projects: Geometric and Solid Modeling, Interactive Collision Detection for Simulated Environments, Immersive Design, Rendering Curved Models, Symbolic and Numeric Manipulation of Polynomial Systems. Also recent papers and technical reports,
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 Revision Universe  Arnav Rawat
Downloadable worksheets with questions on cumulative frequency; line graphs; mean, mode, median and range; pie charts; curved graphs; expanding brackets; graphical solution of equations; ratio; trial and improvement; area and perimeter; density, mass
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 The Ri Christmas Lectures  The Royal Institution of Great Britain
Register to watch the demonstrationpacked, funfilled videos that have formed a part of the British Christmas tradition for generations: "The natural history of a sunbeam," by George Porter; "Mathematics into pictures," by Christopher Zeeman; "Crystals
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 Right Brain  Tom Biesanz, Mister Numbers
Biesanz offers a system for learning times tables through worksheets and a CD. The site offers sample worksheets as well as videos that give an experience of the visual patterns in numbers.
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 Rinus Roelofs
Geometric sculpture, animation, structures, and "rhinoceros" (knots) by Roelofs, who exhibited as part of the Escher Centennial celebrations. After studying Applied Mathematics at the Technical University of Enschede (Netherlands), Roelofs earned a degree
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 Robotic Navigation with Constraints  J. A. Sethian
A paper and movie on robotic navigation. Finding the Shortest Path: The equation that describes the arrival time of this expanding front as it depends on the possible speed at any point and direction is the Eikonal equation. The fast marching method is
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 RU4Math
Games and events for elementaryaged students from Pulaski and Montgomery counties, and Radford City schools, who participated in the RU4Math Fest of March 22, 2003, held at Radford University. Shockwave games about logic and simple equations, currency
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 SAT Free Math Practice  Roland Mfondoum
Download free SAT prep math worksheets, take autoscoring quizzes online, and watch videos on algebra and functions, factorization, polynomial expression expansion, linear equations and inequalities, quadratic equation solving, numbers and operations,
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 SAT Math Pro  Colleen King
Interactive video lessons, timed quizzes, and other instruction for SAT math preparation, categorized into assess, practice, and strategies.
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 SAT Prep Plan  Wendlink
Free SAT study content including streaming video, a custom study plan creator, and many practice problems.
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 ScienceMakers Video Archive  The HistoryMakers®
Thousands of stories from life oral history interviews of dozens of contemporary African Americans at the forefront of science, technology, engineering and math (STEM): Shirley Ann Jackson, chairman of the Nuclear Regulatory Commission (NRC) and president
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