 Addition and Subtraction of Signed Numbers (SMILE)  David Drymiller, Morgan Park High School
A lesson designed to help students master the addition and subtraction of signed numbers, and learn to recognize linear equations of the form x + a = b and their solutions. From the Arithmetic section of a collection of almost 200 single concept lessons
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 Addition Flashcards  A+ Math
Elementary online flashcards for practicing simple addition.
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 Add It Up  CleverMedia
Combine tiles that sum to the target number. Earn extra points for combining more tiles or consuming less time; win a bonus for using up all the tiles; lose points points for every tile left on the board. Requires the Flash plugin.
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 The Addventures of Plusman  Michael Cherry
Math puns, wordplay and illustrated concepts, all in a comic book format. The first of the Plusman series introduces Adam Tegetter, Aidee DeGrangle, Hex A. Hedron, the evil Dr. Nein and the origin of Plusman and the Permutation; the second tells of the
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 ADIFF: Automatic Differentiation Utility  Juan Sanchez
Symbolic derivatives calculator, performs symbolic differentiation of common functions. Allows specification of arbitrary functions and their derivatives for evaluation.
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 Adult Literacy and Lifeskills (ALL) Survey  National Center for Education Statistics (NCES), U.S. Department of Education
The Adult Literacy and Lifeskills (ALL) Survey is an international comparative study designed to provide participating countries, including the United States, with information about the skills of their adult populations. ALL measured the literacy and
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 Adult Numeracy
A collection of resources on adult numeracy, from a group devoted to statistical literacy. Key websites, conferences, publications, organizations, and surveys.
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 Adult Numeracy Core Curriculum  The Basic Skills Agency, via Count On
The U.K. adult literacy and numeracy core curriculum in PDF format. "It sets out the entitlement to learning for all adults who have difficulties with literacy and numeracy. It describes the content of what should be taught in literacy and numeracy programmes
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 Adult Numeracy  Math Forum
Selected articles about adult numeracy compiled for the Math Forum's Adult Education Teachers' Place: the GED; Mailing List; Organizations, Newsletters, and Other Resources.
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 Adult Numeracy Network (ANN)
A community dedicated to highquality mathematics instruction at the adult level. ANN conducts preconferences at the annual NCTM national meetings; publishes the Math Practitioner Newsletter; sponsors the
Numeracy List, an adult electronic forum; and
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 Adult Numeracy @ TERC  TERC
Information about and materials from TERC's adult numeracy projects, including EMPower (Extending Mathematical Power), TIAN (Teachers Investigating Adult Numeracy), and Statistics for Action. The published EMPower curriculum fills the need for a math
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 Adults Learning Mathematics (ALM)
An international research forum bringing together researchers and practitioners in adult mathematics/numeracy teaching and learning in order to promote the learning of mathematics by adults. Biannual listing for researchers, practitioners in adult mathematics/numeracy
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 Advanced Algebra Through Data Exploration: A Graphing Calculator Approach  Key Curriculum Press
An allnew text that combines data exploration, handson activities, and the power of graphing calculators to enhance the content of advanced algebra.
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 Advanced Calculus and Analysis  Ian Craw; University of Aberdeen
Lecture notes and other material provided for a course taught by Ian Craw at the
University of Aberdeen: List of Figures; Introduction; Sequences; Monotone Convergence; Limits and Continuity; Differentiability; Infinite Series; Power Series; Bibliography.
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 Advanced Continuous Simulation Language (ACSL)  The AEgis Technologies Group, Inc.
A modeling, execution, and analysis environment for continuous dynamic systems and processes. With readytouse code blocks, powerful analysis capabilities, and industryspecific toolkits. View case studies in the pharmaceutical, automative, military,
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 Advanced CSS Rendering: Embedding Mathematical Content in HTML  George Chavchanidze
Discussion of a crossbrowser method of rendering mathematical content using HTML and cascading style sheets (CSS). A set of CSS style sheets for online scientific publishing is available.
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 Advanced Data Visualization  Principia Mathematica
PMVisualization Studio is a Microsoft Windows 95, 98 or NT application that takes the Visualization Toolkit (Vtk) data visualization architecture and extends it by providing a graphical pipeline editor. It also includes an Active X control that allows
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 Advanced Discrete Mathematics  Math Forum
Links to some of the best Internet resources for advanced discrete mathematics: Web sites, software, Internet projects, publications, and public forums for discussion.
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 Advanced Geometry  Math Forum
Links to some of the best Internet resources for advanced geometry: Web sites, software, Internet projects, publications, and public forums for discussion.
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 Advanced Grapher  Serpik Soft
Graphing, curve fitting and calculating software. Graphs Cartesian (Y(x) and X(y)), polar and parametric functions, graphs of tables, equations (implicit functions), inequalities and systems of inequalities and slope fields, with up to 30 graphs in one
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 Advanced Learners Math Tutors  advancedlearners.com
This company provides inhome private math tutoring, at the K12 or collegiate level.
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 Advanced Technology Council in Mathematics (ATCM)  ATCM, Inc.
ACTM promotes and facilitates the use of technology for the learning and appreciation of mathematics, supports and enhances research and development in mathematics, and disseminates new and updates information of mathematics to the global community.
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 Advanced Topics in Mathematics  Anthony Beckwith
Page for a high school course exploring fractals, the Global Positioning System, number theory, topology, chaos theory, and the history of mathematics. Syllabus and brief description of each topic.
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 Advances in Applied Clifford Algebras  Jaime Keller, Ed.
A journal that publishes research papers and notes, expository and survey articles, book reviews, and reproduces abstracts, and also reports on conferences and workshops in the area of Clifford Algebras and their applications to other branches of mathematics
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 Advancing Student Achievement: Math Mentoring Grants  The Actuarial Foundation
A school grant program that provides funding to develop math enhancement materials and brings qualified professional actuaries from the community into schools as math mentors to share their enthusiasm, expertise, and love for math. The Actuarial Foundation
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 Adventitious Geometry  Tony Davie; School of Mathematical and Computational Sciences, Univ. of St Andrews, Scotland
A brief illustrated page about a seemingly simple problem involving an isosceles triangle with some angles given. Under what circumstances are all the angles in the diagram rational multiples of pi? Further discussion of adventitious quadrangles and concurrent
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 AdventureOnline.com  Learning Outfitters, Inc.
Interdisciplinary curricula that use the Web to connect students to expeditions from around the world, creating motivating, realtime materials for K12 classrooms. Thematic content includes traditional and online lessons, games, quizzes, research stations,
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 Adventures in Statistics: Cartoon Learning Modules  Ralph Vacca
Available on CDs and online, this 80minute interactive supplement utilizes humor, animations, and engaging storylines to maximize students' understanding while eliminating the "statistics anxiety" that often interferes with learning. Demo available online.
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 Adventures in Statistics  Scavo, Petraroja
A Web unit preprint of a paper by teachers Tom Scavo and Byron Petraroja that describes a mathematics project involving fifth grade students and the area of classrooms, including measurement, graphing, computation, data analysis, and presentation of results;
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 Adventures in the MathZone  Ivars Peterson (MathTrek)
Ivars Peterson and his wife, Nancy Henderson, have written "a book that introduces children to a variety of ideas also of interest to today's mathematicians: knots, map coloring, Möbius strips and topology, prime numbers, chaos, fractals, and more. Our
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 A. Einstein: Image and Impact  American Institute of Physics
All about Albert Einstein. Essays, photographs, and stories; hear Einstein explain his famous equation E=mc^2. Contents: Formative Years; The Great Works; E=mc2; World Fame; Public Concerns; Quantum and Cosmos; The Nuclear Age; Science and Philosophy;
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 Aepryus Software
Aepryus is a developer of math, physics, and evolutionary biology software for Microsoft Windows computers. Download, purchase, or obtain information about programs such as Aepryus Graph, a function plotting application capable of 2D and 3D shaded plots
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 AERA Special Interest Group: Research in Mathematics Education  Jeff Shih
Research in Mathematics Education is a Special Interest Group of the American Educational Research Association. The purpose of SIG/RME is to promote and to disseminate research, development, and evaluative efforts in mathematics education, and to promote
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 The Aerobie^{®} Flying Ring  Alan Adler
A scientific paper by the inventor of the Aerobie® flying ring: "The most difficult aspect of the design task is that the disc must fly over a wide range of α (angle of attack).... A conventional Frisbee disc partially accomplishes this by employing
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 Aeronautics Resources  NASA Lewis Learning Technologies Project
This section of the Learning Technologies Project at the Glenn Research Center includes guides on various aeronautic principles, activities to teach students by example, and Webbased simulations with pre and postsimulation exercises. Topics include:
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 Aesthetics of the Prime Sequence  Turpel Armand
A brief introduction to prime numbers, with a primality testing applet, a page on primes and music, primes and nucleotide bases, primes graphics, idiot savants and primes, primesrelated software, related links, favorite books, and a special page of Lyapunov
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 aeyoung.mathematician  Andrew E. Young
Papers from a Mathematics graduate from The University Of Sussex at Brighton: Number Theory: GCD and Prime Factorisation; Molien's Theorem, Invariant Theory and Gregor Kemper; A History of Equality.
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 The Af2 Proof Assistant  Christophe Raffalli et al., France
A type system based on second order intuitionistic logic. The major design goal of this program was to make as easy as possible the formalization of
mathematical proofs on machine.
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 Affiches dans le métro  Centre de recherches mathématiques
Campagne d'affiches dans le métro de Montréal (celebration de l'Année mondiale des mathématiques). Voyez aussi la série d'affiches de Stéphane Durand, qui a remporté le premier prix du concours international
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 Africa  Mathematics and the Liberal Arts  Todd Hammond
Notes on published articles: a resource for student research projects and for teachers interested in using the history of mathematics in their courses. Many pages focus on ethnomathematics and on the connections between mathematics and other disciplines.
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 African Diaspora Journal of Mathematics
An international journal for mathematical research, emphasizing the contributions of African mathematicians and the rich connections between African Universities and those of other continents. The site offers submission guidelines, contact and subscription
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 African Mathematical Union (UMA)  Dr. Scott W. Williams
The African equivalent of the International Mathematical Union. An interim site with details of the Union's activities; the official webpage of the AMU will be operated from the Al Akhawayn University in Ifrane, Morocco (www.alakhawayn.ma).
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 Against All Odds Video Series: Timings  Gordon Smyth
Gordon Smyth has timed each and every segment of the Against All Odds videos. A great timesaver if you want to show only segments of a particular video. Videos on statistics and probability concepts.
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 AG Algebraic Geometry (Front for the Mathematics ArXiv)  Univ. of California, Davis
Algebraic Geometry preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 AgentSheets  AgentSheets, Inc.
A combination of enduser programmable agents, spreadsheets and Java authoring tools. The new version of AgentSheets lets endusers build a wide range of applications that include interactive simulations, games, and intelligent web agents. Projects created
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 Agents of Cooperation  Ivars Peterson  Science News Online
Researchers are exploring how to enhance the usefulness of computer programs called intelligent agents by making them autonomous, mobile, and capable of learning.
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 Age Word Problems  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
A problem with one variable: Al's father is 45. He is 15 years older than twice Al's age. How old is Al? But what if we can't express all the information in the problem using only one variable? Sometimes we must use two variables to express the given
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 AGMath  Jason Batterson
Though no longer updated, this site still provides puzzles, competition materials, resources for algebra and geometry, PDF worksheets, transparencies, and problem sets. AGMath's creator has since moved on to Art of Problem Solving.
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 Agora Financial for Families  Group 3  GMU EDIT 730/752
Money management articles, lesson plans, and activities for selfstudy or teaching children and tweens about using money responsibly, budgeting, spending, and saving.
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 Agree or Disagree?  Tim McCaffrey
Twenty secondlong video scenarios to motivate math students to "choose a side, start a fight, justify, ask questions, ask for information." Prompts, which date back to October, 2014 and come with sets of accompanying Microsoft PowerPoint clips, have
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