 Geometric Loci
Pictures and animations of mathematical curiosities. Posts, which date back to January, 2014, have included Reuben Thomas iris, the trammel of Archimedes, Möbius hanger, polyhedron drilled pentagonal rotunda, and il triangulo Sierpinski secondo Dimitri.
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 The Geometry Center  University of Minnesota
The Center for the Computation and Visualization of Geometric Structures: an NSF Science and Technology Research Center. The Center has a unified mathematics computing environment supporting math and computer science research, mathematical visualization,
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 Girls' Angle
Girls' Angle is a math club for girls and a supportive community for all girls and women engaged in the study, use and creation of mathematics. By mentoring, publishing the bimonthly Bulletin, and solving math problems on commission, networking professional
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 Granular Volcano Group  Sebastien Dartevelle
The site aims to describe and understand granular flows, fluid dynamic, supercomputer modeling, grain features, and behaviors in volcanology. Includes descriptions of frictional, kinetic, and collisional rheologies of granular matter, and definitions
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 Graphing Stories  Dan Meyer and the BuzzMath Team
Videos, each 102 seconds in length, of stories for students to graph using the freely downloadable accompanying student template. Select from among constant, decreasing, increasing, linear, parabolic, periodic, piecewise, and step graphs; story subjects
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 Guaranteach  Alasdair Trotter and George Tattersfield
Thousands of very short video lessons, recorded by dozens of different professional teachers whose methods and styles of teaching math vary widely. The diverse perspectives and "bitesize" chunks in Guaranteach's video library let viewers stay focused
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 Handheld Geometry  Nevil Hopley
A dynamic geometry site offering lessons and challenges for handheld devices and graphing calculators, including the Cabri™ Jr. Application for the Texas Instruments TI83+ and TI84+, and the TINspire™. The author offers to make users' contributions
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 Hard Problems  George Paul Csicsery, and the Mathematical Association of America (MAA)
Hard Problems is a feature documentary about the students who represented the United States at the 2006 International Mathematical Olympiad (IMO). The film shows the dedication and perseverance of the six American high school students, the rigorous preparation
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 HegartyMaths  Colin Hegarty
Hundreds of narrated screencasts covering the UK's Key Stage 3, GCSE and ALevel curriculums, along with many past paper solution walkthroughs. Instructional videos — most for students; some for teachers — also available from the HegartyMaths
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 High School Projects (COMAP)  Consortium for Mathematics and Its Applications
Products developed in print, video, and multimedia formats, supporting the NCTM Standards, to bring mathematical modeling into high schools around the country, and present mathematics in contexts that are relevant to students. Curriculum: Mathematics:
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 High Speed Vedic Math Online DVD  The Vedic Maths Forum India
Learn to calculate 15 times faster than conventional methods. 15 Hours High Speed Vedic Math DVD. Books. Covers squares, square roots, multiplication, division, cubes, cube roots, algebra, equations, quadratic equations, Pythogoras' theorem, and more.
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 HippoCampus  Monterey Institute for Technology and Education
Video lessons in arithmetic, algebra and geometry, statistics and probability, calculus and advanced math. The Monterey Institute for Technology and Education also runs the National Repository of Online Courses (NROC) and NROC math.
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 HomeworkTV.com
Video lessons for grades 68 "presented by a live National Certified teacher who explains lessons in real motion." A topic list for each grade is available on the site.
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 Hooda Math  Michael and Teresa Edlavitch
Interactive games, math movies submitted by students, tutorials, and links for students and teachers.
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 How round is your circle?  Bryant, John; and Sangwin, Chris
These photos and QuickTime movies accompany the book How Round Is Your Circle? Where Engineering and Mathematics Meet. See, in particular, the illustrations of how to drill a square hole. Sections include Falling apart (the Pythagorean Theorem, Dudeney's
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 Hydroponics Project Page  Holtz, Cooper; Levering School, Philadelphia, PA
A project plan for a seventh grade class that involves growing different hydroponic gardens and measuring and graphing the results. Included on this site are: project summary reports, pictures of the kids and the gardens, results chart, movie, standards
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 IB Math Prep  Stan Rachelson; Distance Education Courses, Inc.; South Carolina Educational Communications
IB Math Prep contains video lessons designed for students to prepare for the IB Math Exam. The lessons address the topics found in the International Baccalaureate Math Standard Level (SL) curriculum including: Algebra/Functions, Circular Functions/Trigonometry,
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 The Ignite Show  Georgia Public Broadcasting
TV shows and blog that "raise respect and awareness of educators and education through the voices of teachers, parents and students" in studentcentered classrooms. Half hourlong videos that feature math teachers include episodes starring 2008 California
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 Illuminations  National Council of Teachers of Mathematics (NCTM)
Interactive resources for students and teachers based on NCTM's Principles and Standards for School Mathematics. The site is divided by grade band (PreK2, 35, 68, 912, and a crossband section). Each band contains the following topics: iMath Investigationsinteractive
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 Inside Mathematics
Classroom examples of innovative math teaching methods, insights into student learning, and instructional tools ready for immediate use. Adopt a schoolwide problemsolving theme with Inside Mathematics' Problems of the Month, each featuring video overviews,
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 Interior Point Methods  Steven Wright
Research into algorithms for linear programming which approach the solution through the interior of the feasible polygon, rather than moving around the boundary from vertex to vertex, as simplex methods do. Background; thumbnail sketch; zipped Postscript
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 International Numerical Relativity Group  NCSA/LCAPotsdamWashU
Physics at the National Center for Supercomputing Applications or its Potsdam/Germany mirror site, using supercomputers to study black holes, gravitational waves, and other phenomena predicted by Einstein's Theory of General Relativity. Search or browse
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 An Investigation of Subtraction Algorithms from the 18th and 19th Centuries  Nicole M. WessmanEnzinger
An exploration of different algorithms used during 18th and 19th century America, with discussion of implications for the modern teacher. This article, which originally appeared in the January 2014 issue of the Mathematical Association of America (MAA)
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 Is All About Math  Julio Cesar de la Yncera
Main site for a mathematical Video PodCast that will cover a big range of topics in collegelevel mathematics accessible to the majority of the students with some mathematical inclinations. The Video PodCast will also try to be inspirational for the nonmathematically
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 iSchoolPolymath  Sarah Prendergast
Video libraries, syllabi, Pinterest inspiration pages, and other materials for math courses taught at iSchoolPolymath, a public high school in New York City. Prendergast's Algebra I course incorporates gamification, handson projects, problem solving,
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 James Poon Online Classroom  James Poon
Online instructional mathematics videos; a discussion forum; and articles on study skills.
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 Jo Boaler
From the author of What's Math Got to Do with It?: How Parents and Teachers Can Help Children Learn to Love Their Least Favorite Subject. Watch a YouTube clip of Boaler teach using Inquiry Based Learning method, or click through her presentation entitled
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 Josh Hertel
Hertel serves the University of WisconsinLa Crosse as an assistant professor in the mathematics department. He completed his Ph.D. in Mathematics Education at Illinois State University with the freely downloadable dissertation "Investigating the Purpose
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 Juggling Drops and Descents (Organic Mathematics Proceedings)  Joe Buhler, Ron Graham
A discussion of the permutations f of the integers Z satisfying $f(x) \ge x$, with applications to juggling patterns. Demonstrations are included and the site includes QuickTime movies.
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 JustMaths  Seager, Christian; Khawaja, Faisal; Muldowney, Melanie
Video tutorials, practice exam questions, and other intervention resources created by three teachers practicing in the UK Midlands. Free resources include "trumps" and exam questions in algebra, data handling, geometry and measure, number, and more. Blog
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 Karismath  CLSO Learning Systems, Inc.
Math topics, including Algebra, are presented visually, through lessons (Flash animations that explain a target concept), demos (Flash animations that explain every exercise template to be used) and worksheets (PDF format) that can be downloaded. Each
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 Key Curriculum Press
Publisher of innovative texts and software applications for teaching mathematics including the Geometer's Sketchpad (dynamic geometry), Fathom (dynamic statistics), TinkerPlots (dynamic data exploration and analysis), Michael Serra's textbook Discovering
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 Khan Academy  Salman Khan
Salman Khan has recorded over 1400 YouTube videos on a variety of topics, largely math and finance. The Khan Academy, which Khan founded, is a notforprofit organization with the mission of providing a high quality education to anyone, anywhere. To keep
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 Kids First  Coalition for Quality Children's Media (CQCM)
The Coalition for Quality Children's Media evaluates children's media, and is a resource center and clearinghouse for children's media that helps parents and kids find good adultapproved and kidtested programming. A searchable video and CDROM database
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 The Latin School of Chicago Middle School Problem of the Week  Tom Canright
Math and logic puzzles  many original, some reproduced from sources such as NCTM journals  with solutions presented in accompanying videos.
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 The Learning Community  Stanley, Sarah; Allee, Angie; Mills, Connie; and Flanagan, Melissa
Dedicated to giving parents "... the information and resources they need to raise their children lovingly, supportively, and successfully." Since 1993, the nonprofit Learning Community has helped schools and families work together on behalf of children.
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 Learning in Motion
Learning in Motion creates and publishes innovative software for K12 education. Monthly listing of the Top 10 Educational Web Sites; Knowledge Forum, a student knowledgebuilding environment; Measurement in Motion, a math/science learning tool (demo
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 Learning Math is Fun  Kevin Cornell
Learn the order of operations by watching a video of the PEMDAS song. Before becoming an elementary school principal, singer "Mister C" taught 5th grade science and served as a math coach. See also Cornell's science site at http://www.learningscienceisfun.com/.
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 Learning Resources, Inc. (LRI)
LRI provides programs and services that support employers, colleges, technical institutes, secondary and adult schools and 1stops with assessment, training, curricula and consulting that: (1) assess, develop and document highperformance, employability
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 Learning Wave Communications  Human Relations Media
Learning Wave is a producer of videos, CDROMs and other supplementary materials for math education including interactive games such as Absurd Math. Under the name HRM Video it has created programs such as middle school math mysteries, applicationsbased
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 The Legacy of R. L. Moore  Educational Advancement Foundation
The Legacy of R.L. Moore Project promotes the study of inquirybased learning (IBL) and teaching methods that Moore propagated while teaching topology at The University of Texas. The "Moore Method" eschews textbooks; calls for only the briefest of lectures
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 Leigh Nataro  YouTube  Leigh Nataro
Brief narrated screencasts for algebra, geometry, AP Statistics, and other high school math subjects, often using Fathom software and TINSpire technology.
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 Lesson Study in Japan  U.S. Science Education  Education Department, Mills College
Research into Japanese "lesson study," a process in which teachers cooperatively develop and critique new lessons. The site focuses on possible applications and challenges of lesson study to U.S. science and math education. Read related articles and
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 Level Set Methods Applied to Microchip Manufacturing  J. A. Sethian
A paper and movies on microchip manufacturing. Part of the process of manufacturing a computer chip consists of digging holes in silicon wafers and coating them with materials. At various stages, level set methods can be used to track the evolution of
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 Level Set Methods for Shape Recovery  J. A. Sethian
Overview of a movie on medical imaging. Imagine that you are given an image, say a medical (MRI or CT) scan. Suppose you want to extract the important feature within the image of a digital subtraction angiogram (DSA); in this case, the outline of the
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 The Logo Foundation
A nonprofit educational organization devoted to informing people about Logo and supporting them in their use of Logobased software and learning environments. The site includes links for workshops and seminars; books and videos; Logo software (at discount
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 LSCNet  TERC, Inc.
Best practices, issues, and resources for the National Science Foundation's 72 Local Systemic Change (LSC) Projects across the country. Each of these projects provides teacher professional development and curriculum innovation in the areas of math and/or
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 MAA Bookstore  Mathematical Association of America
A searchable list of books, with descriptions, in the following categories: Algebra; Analysis; Applied Mathematics; Calculus; Career Information; Computing and Computers; Elementary Models; Games, Puzzles, and Popular Exposition; Geometry and Topology;
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 Maisonet Math  Shane Maisonet
This website provides math worksheets in pdf form for public download. Online quizzes also provide instant feedback to indicate level of mastery. Online videos of various math concepts are also available.
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 Making Learning Real  Nashville State Technical Community College and WGBH Educational Foundatio
Videos, professional development, and other resources for teachers already teaching ProblemBased Case Learning (PBCL) or considering such instruction grounded in realtime workplace situations. PDFs available for free download include a Need to Know
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