 GIFsmos  Lusto, Chris; Luberoff, Eli; and Merrill, Jason
Takes any animated Desmos plot and converts it into a dynamic graphic. GIFsmos lets you determine the size of the resulting gif animation, and toggle its frame interval from 0.1 to 1.0 seconds.
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 Global Institute of Mathematics  Jim Stone, Global Institute of Mathematics
A traditional high school curriculum of Algebra, Advanced Algebra, PreCalculus and Calculus, delivered online via email and the Web. Sample lessons available.
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 Glossary  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A glossary of terms that also serves as an alphabetical index to Bogomolny's site. Each term is linked to an illustrated essay.
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 Glossary of Mathematical Formulas  Keiichi Suzuki
This glossary of math terms and formulas, succinct enough for viewing on handhelds and other smaller screens, covers geometry, set theory, algebra, abstract algebra, trigonometry, vectors, matrices, calculus, complex functions, special functions, orthogonal
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 GoodQuestions Project  Dept. of Mathematics, Cornell University
The GoodQuestions project seeks to improve college calculus instruction by adapting two methods developed in physics instruction — ConcepTests and JustinTimeTeaching. GoodQuestions is a pedagogical strategy that aims to raise the visibility of the
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 Got Math?  Dave Radcliffe
Blog by a community college math instructor and selfdescribed "GeoGebra fanatic." Posts, which date back to December, 2010, have included "Stacking cannonballs," "Counting with Integrals," "A Paradoxical Dissection," "Gelfand's Question," "Imagining
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 Graphe Easy  Olivier Ansquer
Featurerich yet easytouse 2d graphplotting Windows software. Demo version available. It allows users to draw many graph types (Cartesian, polar, parametric coordinates) and many other graphs such as conics, integrals, inequalities, or sequences. It
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 Graph Explorer  Alan Cooper, Dept. of Mathematics & Statistics, Langara College
A JAVAbased graphing utility. This applet is designed to allow you to zoom in and out smoothly, or to pan across the graphs of functions that you define. Use it to display the graphs of functions that you want to study, either individually or in families
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 GraphFunc: Sketch Graphs Online
GraphFunc is a Java applet used to plot mathematical functions in two or three coordinates. Instructions and examples available.
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 Graphics for the Calculus Classroom (Java version)  Douglas N. Arnold; Institute for Mathematics and its Applications
Excerpts with Java animations from a collection of graphical demonstrations developed for first year calculus. Includes: Differentials and differences, computing the volume of water in a tipped glass, Archimedes' calculation of pi, how the ball bounces,
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 Graphing Applets for Calculus  Eric A. Carlen
A collection of calculus applets, two packages of Java classes used for writing such applets, and full documentation of the packages and their use, with source code for all the sample applets. Applet topics include: the basins of attraction for Newton's
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 Graphing Calculator 3D  Runiter Company
Makers of visual, tutorial, and computational software such as Smart Math Calculator, Graphing Calculator 3D, A&G (algebra and geometry) Grapher, Statistics Problem Solver, and Calculus Problem Solver.
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 Graphing Cubic Polynomials  Jim Carlson, University of Utah
A Java graph with changeable coefficients. Draw the graph, zoom in or out, click on any point to get approximate coordinates. Arc length and rise/run calculated.
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 Graphmatica  Keith Hertzer, kSoft, Inc.
An equation plotter with numerical and calculus features. Graph Cartesian functions, relations, and inequalities, plus polar, parametric, and ordinary differential equations. Up to 25 graphs on screen at once. Offers copy to clipboard (bitmap and WMF),
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 GraspMath  Summit Interactive
Interactive CD and Video Courses to purchase: Elementary Math, Algebra, Geometry, High School Exit Exam Prep, Trigonometry, Calculus, TI Calculators and more. Stand alone math courses with assessments and guides; remedial math program supplements; tutorials
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 GSP Files  Nate Burchell
This website includes GSP files that can be freely downloaded for educational use. The author has used these files in his classes to illustrate certain concepts in Precalculus, AP Statistics, and AP Calculus AB/BC.
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 Hacktastic  Laura Taalman
Blog about "design, mathematics, and failure" by Taalman, a professor of mathematics at James Madison University, as she learns JavaScript, three.js, and WebGL. Posts, which date back to October, 2014, have included "Menger Menagerie," "Trigonometry Style,"
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 Handheld Software Applications  Texas Instruments, Inc.
Software applications and programs made available for downloading as a noncommercial service to benefit TI graphing calculator owners. Programs are offered for each of Texas Instruments' graphing calculators, CBL, and CBR, as well as calculator program
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 Harold Reiter's Home Page  Harold Reiter, Department of Mathematics, University of North Carolina at Charlotte
Freely downloadable puzzles and problems from the founder of teachers circles and math clubs in Charlotte and Mecklenburg, longtime writer of MathCOUNTS questions, and member of the ETS/College Board CLEP (CollegeLevel Examination Program) Precalculus
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 HarvardMIT Math Tournament  Early, Owen
The HarvardMIT Math Tournament is an annual math tournament for high school students. Categories of tests typically include algebra, calculus, combinatorics (formerly "advanced topics"), geometry, general, oral, team, and guts; minievents include Buzz
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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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 Helena A. Verrill  Department of Mathematics, Louisiana State University
Notes, links, handouts, and other materials from the courses that Verrill teaches, such as Solving Discrete Problems, Calculus, Elliptic Curves, and Modular Forms. She also provides a Java applet for a wallpaper drawing program and stepbystep illustrations
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 Helmer Aslaksen
A mathematics professor at the National University of Singapore. Research involves abstract algebra, including the trigonometry of symmetric spaces, and calculations for the Chinese, Islamic, and Indian calculators. Papers about these topics may be
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 Higher Bitesize: Maths  BBC Scotland Learning
"Tasty chunks of revision goodness..." Revision means studying, and this site aims to help students study, with online illustrations and materials, and interactive tests.
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 High School Homework
Highschoolhomework offers homework help in the following subjects  algebra, geometry, trigonometry, calculus, biology, chemistry, physics and economics.
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 High School Mathematics  Cem Giray
Site contains lecture notes, exams, quizzes, assignments, challenging problems, curricula (in this case meaning topics of study), and olympiad materials of high school level for teachers and students. Some materials are web pages, some are in PDF format,
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 High School Math Lessons  Joe Mercer
Lessons, worksheets, quizzes, and tests for high school algebra 1, algebra 2, geometry, precalculus, and AP Calculus AB written by a retired math teacher. Some of the resources, composed in SoftChalk's LessonBuilder, include Flash animations or download
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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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 Historical Tidbits  Paul Golba
Biographical and mathematical information (from an online interactive textbook on Real Analysis by Bert G. Wachsmuth) on Niels Abel, Archimedes, Johann Bernoulli, Bernard Bolzano, Georg Cantor, Augustin Cauchy, Augustus De Morgan, Euclid, Leonhard Euler,
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 History of Mathematics  Carl Eberhart; Dept. of Mathematics, Univ. of Kentucky, Lexington, KY
Information and Maple worksheets on Egyptian fractions and geometry, Babylonian numeration, Hippias and his Quadratix, cubic equations, trigonometry until Ptolemy, curves, and more. Also examples of student projects. A spring 1999 course on the history
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 Holistic Numerical Methods Institute  Autar Kaw
Open courseware, books, primers, journal abstracts, PowerPoint presentations, multiple choice tests, and other resources supporting a typical course in Numerical Methods for undergraduates majoring in science, technology, engineering and mathematics (STEM).
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 Home Page for Laura Taalman  Laura Taalman
Course materials, mentored projects, publications, and more from Taalman, a professor of mathematics at James Madison University. Taalman's interests range from singular algebraic geometry and knot theory to games, puzzles, and 3D printing. The Puzzles
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 Homework Help  Homeworkhelp.com, Inc.
Over 1000 tutorials, indexed for searching, for help with math, English, science, and ESL. Middle School math (grades 68) covers fractions, decimals, percents, graphing, functions, geometry, etc. High School math offers prealgebra, algebra I and II,
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 HomeworkSpot  StartSpot Mediaworks, Inc.
Designed to help students start homework assignments that require online resources, HomeworkSpot also provides reinforcement activities in a variety of subject areas including mathematics. Math sections provide links organized as general sites, topics,
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 Hotmath
Tutorial solutions for the oddnumbered homework problems in many U.S. math textbooks, algebra through calculus. A site designed to provide students with help in doing homework directly from their own books, and teachers with a resource to use in the
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 Hyperbolic Angle  Robert G. de Boer
Exposition of a new presentation of the hyperbolic angle, together with hyperbolic functions sinh x and cosh x. The Cognitive Foundation section explains the rationale for this presentation order.
The author writes:
"The argument of hyperbolic functions
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 HyperMath  Carl R. (Rod) Nave; Georgia State University
HyperMath uses concept maps to explore mathematics ideas and applications to physics and astronomy. Originally developed in HyperCard, HyperMath covers the topics of algebra, trigonometry, geometry, vectors, linear algebra, logarithms, exponents, calculus,
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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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 iCoachMath.com  HighPoints Learning, Inc.
iCoachMath.com coaches students online; and provides teachers with student performance reports, customized test papers, and math resources such as lesson plans aligned to state and national standards. The site freely offers an illustrated dictionary of
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 iFigure
Links to online calculators and worksheets that provide information to help in planning, solving and making decisions for problems and tasks such as buying a home, investing money, figuring business profits, making statistical comparisons, or calculating
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 I Hope This Old Train Breaks Down...  Mimi Yang
Blog by a high school algebra, precalculus, and calculus teacher in Seattle, by way of teaching positions in New York City, El Salvador, and Germany. Posts, which date back to March, 2009, have included "Math Projects," "The magic of teaching; El Trifinio,"
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 I Love Calculus  Cynthia Lanius
"It's hot and it's fun and it's a challenge." A list of good beginning Web links for calculus.
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 ILoveMath.org  Shelli Temple
ILoveMath.org is a comprehensive site for middle and high school math teachers full of "readytouse" lesson plans, worksheets, activities, and more. The site also features an active message board for math teachers to collaborate.
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 Images and Mathematics (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
A large collection of images based on or related to mathematical principles, many purely mathematical abstractions, such as fractals; others of natural objects whose shape is explained by equations and mathematical models (for example, a drum vibrating).
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 Images des Mathématiques  Fabrice Planchon, EditorinChief
Des articles sur la recherche mathématique contemporaine — en particulier, française — et le métier de mathématicien. Hébergé par le Centre National de la Recherche Scientifique (CNRS).
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 Indian Ocean Monsoon  Earth Space Research Group (ESRG)
A scenario developed by the Dept of Geography at UCSB and the EarthSpace Research Group, part of the Institute for Computational Earth System Science. Includes sections useful for firstyear Calculus students. The monsoon, one of the most dramatic climates
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 Infinite Tangents  Ashli Black
This "secondary mathematics education podcast for teachers," begun in March, 2013, invites other high school math teachers to respond to prompts such as "How do you start your teaching day?" and "What would you like to get done in the times between classes?"
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 Insert Clever Math Pun Here  Meg Craig
Blog chock full of original classroom assignments and handwork samples. Posts by the Birmingham (Alabama) math teacher, which date back to July, 2014, have included "Equation Editor Awesomeness," "#mtboschallenge 123 Sunday Summary," "The Bagel AwardWinning
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 Integral Calculator  David Scherfgen
The Integral Calculator calculates definite and indefinite integrals (antiderivatives) of functions. This free online calculus tool, powered by the computer algebra system (CAS) Maxima, also dynamically typesets the user's input as a LaTeX formula using
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 Integrated Calculus with Precalculus  Ann Marie Murray
A oneyear course that covers the topics of Calculus I, taught as a twocourse sequence with the same credit as a separate Precalculus and Calculus I course. It includes, on a justintime basis, all precalculus topics needed to understand and to solve
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