 Aha!Math  Learning.com
This K5 curriculum package, aligned to state and Common Core standards, supports differentiated instruction with multiple instructional models. Aha!Math provides students with immediate feedback in interactive story settings. Freely sample games and
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 Aid for Calculus  John Taylor
Tutorials and practice questions for Calculus 1 and review topics.
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 AIGEOSTATS  information server about spatial statistics  Gregoire Dubois
AIGEOSTATS is the central server for GIS and Spatial Statistics (geostatistics, spatial interpolation, sampling strategies, ...). It has its own forum of around 1000 researchers. Site contains a mailing list, discussion/FAQ features, software, papers,
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 AIMMS  Paragon Decision Technology
This optimization software for advanced modeling concepts features solvers for major mathematical programming types and a full graphical user interface both for developers and endusers. Read about features and licensing options; see industrial applications,
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 AIMS Education Foundation
"Activities Integrating Mathematics and Science." A nonprofit, independent organization established to develop integrated math/science materials for grades K9. See, in particular, the AIMS Puzzle corner (a new puzzle each month), the AIMS@Kids Interactive
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 Ainsworth Computer Seminar  Dick Ainsworth
Sample programs, flowcharts, and hypertext illustrating how software works. Select the desired level, from a quick overview of software to a detailed look at how these programs are developed. A special section for programmers and other curious people
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 The Air Force Collaboratory  U.S. Air Force
The Collaboratory poses military challenges for students to tackle with a community of peers — and alongside real Airmen. Experience science, technology, engineering and mathematics (STEM) in action with projects such as "Search and Rescue 2.0,"
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 Airplane Weight and World Population (Math Chat)  Frank Morgan; Christian Science Monitor
J. Henry asks whether, on a sinking boat, it helps to make parakeets in the hold fly around. K. Reinecke asks whether an airplane gets lighter when the passengers eat a meal. What causes an airplane to get lighter during flight?
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 Air Pollution: A Local and Global Problem  Karen Bardeen
Students investigate the problem of air pollution in a given location and research possible solutions using a variety of tools (laboratory technology, Internet resources, multimedia technology, etc.). Mathematics goals include estimating, making, and
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 AJ Design Software  Jimmy Raymond
Provides various math, science, and engineering calculators. Calculators include geometric shapes, constant acceleration motion, ideal gas law, pipe flow, Reynolds number, venturi meter, and quadratic equation.
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 The A. J. Pappanikou Center for Developmental Disabilities  University of Connecticut
A University Affiliated Program (UAP) sponsored by the Federal Administration on Developmental Disabilities through the U.S. Department of Health and Human Services. The Pappanikou Center UAP works with others to create opportunities that improve the
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 Akalu Tefera's Electronic Headquarters  Department of Mathematics and Statistics, Grand Valley State University
A mathematician whose research interests include computer algebra, automated theorem proving, and combinatorics and their "derivatives" or "equivalence classes." The site contains Maple packages for multiple integration of hyperexponential functions.
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 Akustische Täuschungen/Acoustic illusions  Stefan Scheller
Endlos ansteigende Melodien: Der ShepardEffekt. Endlessly rising melodies: The Shepard effect. (Illustration: M. C. Escher: Treppauf, treppab  ascending, descending.) Besides the wellknown optical illusions there are acoustic ones, too. Perhaps the
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 Alan Hensel's homepage  Alan Hensel
Instantaneously convert from decimals to fractions, as you type, with this JavaScript calculator. Hensel, a software developer, also offers a Java version of Conway's Game of Life, as well as interactive Twixt Quarterboard puzzles (Ajax) and a Twixt commentator
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 Alan H. Schoenfeld  Graduate School of Education, University of California, Berkeley
Download PDFs of publications on mathematics education and curricular considerations such as "Mathematics Teaching and Learning"; "The Math Wars"; "Learning to Think Mathematically: Problem Solving, Metacognition, and SenseMaking in Mathematics"; "Toward
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 The Alan Turing Home Page  Andrew Hodges
A gateway and guide to a large site dedicated to Alan Turing (19121954); 25 pages of biographical information on this computer scientist, mathematician, and cryptographer, from the author of Alan Turing: the Enigma.
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 Albanian Journal of Mathematics  Tanush Shaska, Founding Editor
A peerreviewed mathematical journal for the publication of original research articles of excellent quality in mathematics. The journal aims to reflect the latest developments in mathematics and promote international academic exchanges between Albanian
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 Albert Einstein Online  S. Morgan Friedman
Information about Einstein, pictures, organizations that bear his name. Biographies, Hong Kong Baptist Univ. and MacTutor History of Mathematics Archive; Einstein's History; Obituary; Information, David Joyce; Einstein's interview with the FBI; Why Socialism?
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 ALEKS  UC Regents and ALEKS Corporation
An allJava, Webbased oneonone math tutor on the Internet that adapts continuously to the student, maintaining a map of each student's knowledge state. Try a free 48hour demo.
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 Alexandre Borovik
Borovik teaches and researches group theory at the University of Manchester (UK), where he is a Professor of Pure Mathematics. See his eightpoint teaching manifesto, read about his methodology, and download slides of selected talks, which include "Hidden
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 Alexandru Suciu  Alexandru I. Suciu
Teaching resources such as quizzes, homework assignments, Mathematica solutions, qualifying exams, and syllabi for undergraduate courses in integral calculus, honors calculus, and linear algebra; and for graduate courses in geometry and topology. Also,
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 Alex Bateman's Origami Page
Models by Alex Bateman, Dino Andreozzi, Nick Robinson, and a duck by Edwin Corrie. Includes directions for folding some origami tessellations: square dance, honeycomb, linked circles. Spirals based on Voderberg's tilings, tessellations based on 6.3.6.3
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 Alex Vinokur's Home Page  Alex Vinokur
Links to resources of interest to computer scientists: Huffman Coding (an nary Huffman Template Algorithm, Arbitrary Huffman trees), Fibonacci numbers (computing very large Fibonacci numbers, computing Fibonacci numbers on a Turing Machine, the connection
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 The Algae Programming Language  Scott Hunziker, Mike Brennan
A free (GNU GPL) highlevel interpreted language for numerical analysis.
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 Algebasics  Algebasics.com
Watch free Flash tutorials about algebra, organized under the following topics: Basics of Algebra, Equations, Ratio & Proportion, Inequalities, Absolute Value, Exponents, Polynomials, Factoring, Rational Expressions, Rational Equations, Linear Equations,
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 Algebra1: Graphing Linear Equations  Tim O'Brien
A Master's Degree project designed to provide an understanding of the graphing of linear equations at the Algebra 1 level. Use Java applets to learn about ordered pairs, graphing equations, horizontal lines, vertical lines, slope, equations and slope,
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 Algebra 4 All
A community of educators sharing resources and supporting one another in the practice of teaching algebra: lesson sharing, applets for students and teachers, discussion forum, blogs, media, and other content related to the functionsbased approach to
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 Algebra, Abstract and Concrete  Frederick M. Goodman
An undergraduate textbook (Prentice Hall, 1998). The book is intended to be useful for a course in modern algebra for beginners or a slightly more advanced course, or an undergraduate course on geometric aspects of group theory or Galois theory. Interactive
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 Algebra: A Complete Course On Video  VideoText Interactive
A complete Algebra course on videocassette to purchase for home use or the calssroom: video lesson tapes, course notes, worktext, solution manuals, and progress tests. A free video sample is available onsite.
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 Algebra and Calculus Sketches  Ruth Carver
See how the graph of y=mx+b changes as m or b changes; how the graph of y=ax^2+c changes as a or c changes; how the graph of y=a(xh)^2+k changes as a,h and k change; and examine five Geometer's Sketchpad sketches showing how to find equations of tangent
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 Algebra and Discrete Mathematics  Dr. Josip Hendekovic, Contact
Symmetries and Ordered Structures under the Influence of Model Theory and Combinatorics, a conference in Hattingen (near Essen), Germany, 26–31 July 2003.
Part of the Euresco programme and open to researchers worldwide, whether from industry or academia.
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 Algebra and Trigonometry Web Site: Semester 1 (MQ5)  Gary Jaye, Department of Mathematics, Stuyvesant High School
Algebra and trigonometry exams, dating back to 1995, given by a Stuyvesant High School mathematics teacher. Answers accompany all the tests, making them suitable for practice, review, or selfassessment.
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 Algebra Class  Karin Hutchinson
These free Algebra lessons are written by a Math teacher for students who are having difficulty with Algebra 1. Each lesson is presented with several detailed examples, many practice problems, and an answer key. A perfect solution for students in need
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 Algebra Coach  Eric Hiob
Freeware (but please register) for use on Windows 95 and higher. The Algebra Coach shows the user stepbystep how to solve any equation or simplify any expression that they enter. It also shows how to solve any system of linear equations by substitution
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 Algebra Equation Worksheet Generator  David Craft
A free Webbased tool for making customized algebra worksheets. It includes linear equations, systems of linear equations, and quadratics; the teacher can choose whether or not to include fractions and negatives.
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 Algebra for Athletes.com  Cameron Bauer
Excerpts from the Nova Science Publishers, Inc., book Algebra for Athletes: algebraic laws illustrated in a variety of sports scenarios; exponents and weight room mechanics; linear equations and speed; vectors and golf; quadratic equations and parabolas;
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 Algebra Funsheets
Algebra worksheets that integrate Algebra skills with sudoku, riddles, games, word finds, etc. Created by an algebra teacher. Browse topics covered, see sample worksheets, or subscribe for complete access.
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 Algebra  Fun with Calendars  Cynthia Lanius
Take any calendar. Tell a friend to choose 4 days that form a square. If your friend tells you only the sum of the four days, you can tell her what the four days are. How does the puzzle work? Includes a extension page for designing your own puzzle, teachers
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 Algebra Glossary of Terms  Annie Nielson
A glossary of algebra terms taken from Houghton Mifflin's Algebra Structure and Method Book 1.
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 Algebra Help Hub
This website offers explanations of concepts in algebra at the high school level.
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 Algebra.Help  John Traker
Algebra.help is an online resource designed to help people learn algebra. It offers lessons to teach or refresh old skills, calculators that show how to solve problems stepbystep, and interactive worksheets for testing skills. To be notified of updates
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 Algebra Help  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How do I help students learn algebra?
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 Algebra Help Tutorials
HelpAlgebra.com provides free algebra tutorials, glossaries, calculators, software reviews, and general algebra help.
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 Algebra Homework Help  Math.com
A site for practicing algebra and measuring your level. Units include The Language of Algebra; The Basics of Algebra; Equations and Inequalities; Graphing Equations and Inequalities; Tables and Formulas. Includes unit quizzes.
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 AlgebraHouse.com  Mr. Sims
Algebra 1 and 2 notes in stepbystep PowerPoint form—with a Microsoft Viewer for download, as the files are passwordprotected otherwise. Also, a variety of Algebra 1 and 2 questions with answers on various topics.
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 Algebraic Addition (SMILE)  Alex Junievicz, Kelly High School
A lesson that uses play money and IOUs to reinforce concepts around negative numbers. From the Algebra and Trigonometry section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 Algebraic Combinatorics Via Finite Group Actions  A. Betten, H. Fripertinger, A. Kerber
An Internet book with chapters on Actions: Actions of Groups; Bilateral classes, symmetry classes of mappings; Finite symmetric groups; Complete monomial groups; Enumeration of symmetry classes; The involution principle; and Special symmetry classes;
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 Algebraic Curves  Silvio Levy; The Geometry Center
Curves that can be given in implicit form as f(x,y)=0, where f is a polynomial, are called algebraic. This site provides an overview, with illustrations.
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 Algebraic Factoring  Suzanne Alejandre
A Math Forum Web Unit. Vocabulary, objectives, materials. Students use algebra tiles to explore algebraic factoring.
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 Algebraic Geometry 
Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to algebraic geometry, which combines the algebraic with the geometric for the benefit of both. Thus the recent proof of "Fermat's Last Theorem"  ostensibly a statement in number theory  was proved
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