 Algebra Visualization Tools  Dennis Sullivan, Founder
Slide the controllers of these Java tools to change the parameters of these five types of equations  and see their effects on these graphs instantly: linear equations, absolute value, quadratic equations, vertex form, and rational equations. The applets
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 Algebra Worksheets  Ashley Nieves
Download free PDFs of worksheets for prealgebra, elementary algebra, algebra 1, algebra 2, intermediate algebra, and algebraic word problems.
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 Algorithmic Art  Fractal Art Gallery  Manfred W. Rupp
Unusual fractals with nonstandard algorithms  geometric patterns made using FRACTINT that rely on mathematical models.
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 Algorithms and Ice Cream For All (MegaMath)  Nancy Casey; Los Alamos National Laboratory
Solve a city planning problem using mathematical graphs and algorithms. Students use algebraic methods to explore, model, and describe patterns and functions involving numbers, shapes, data, and graphs in problemsolving situations and communicate the
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 Aligning and Articulating Standards Across the Curriculum (NCREL)  Cathy Cook; Pathways to School Improvement
Critical Issues in Mathematics. Students often do not see any connection between the mathematics they learn in school and the other subjects they study. As a result, many students do not see or understand the connection between mathematics and their daily
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 Alive Maths/Maths à Vivre  Nathalie Sinclair
Handson, interactive "microworlds," in which students investigate patterns and relationships, pose questions, play with the variables, and solve problems: Play with Lulu on a grid; practice triangle reflections; play with fractions and decimal patterns
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 All About Ratios  Cynthia Lanius
Activities designed to help students understand the concept of ratios, using the Internet. Activities may also be printed out if computer access is not available. Students are expected to: use multiplication and division of whole numbers to solve problems,
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 All Educational Software: Math Software  Kimball & Wood Enterprises, LLC
Math learning games, math help and software for kindergarten through high school. Educational software to help kids learn addition, subtraction, algebra, geometry, calculus, statistics and more.
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 allmath.com  Arbor Media, Inc.
Math tools (flash cards, a metric converter); games (magic square), and reference pages: biographies, a glossary, the multiplication table, metric conversion factors, and an ask an expert service.
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 ALLREALS+BLOG  Marty Romero
Blog about "effective educational reforms/policies and empowering students through equitable pedagogical practices." Posts, which date back to September, 2012, have included "Procedural Knowledge vs. Conceptual Understanding (A Dad's dilemma)"; "Obesity
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 All Star Review
A review site designed to help teachers and parents find out about software, audio, video and other educational products before purchasing them. Search for software and other materials alphabetically, by level, or by subject (see Math Audio and Software.)
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 All the King's Digits  Terry Trotter
Challenge: Using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, and the operations of +, , x, ÷, sqrt (square root), cbrt (cube root), ^ (raise to a power), and ! (factorial), along with grouping symbols, write expressions for the counting number 100.
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 All the News That's Fit to Math
Blog of mathematical questions that arise from news headlines. Posted by an Australian teacher since January, 2014, entries have included "The decline of cancer rates in the USA," "The Royal Family's Spending Habits," and "Are Super Bowl ads worth it?"
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 Alphabet Geometry  Jamie Tubbs, MisterTeacher.com
Learn about geometry by looking at letters. Included are interactive Flash movies on transformations, angles, and similar letters. Movies on parallel and perpendicular lines are planned.
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 Alphametics  Torsten Sillke
Cryptarithms are puzzles in which letters or symbols are substituted for the digits in an arithmetical calculation. If a cryptarithm uses letters in place of digits, and the letters form words or phrases, the puzzle is an alphametic. J. A. H. Hunter coined
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 alt.algebra.help
A newsgroup for asking and answering to algebra questions.
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 alt.algebra.help  Math Forum
An unmoderated newsgroup focused on algebra. Read and search archived messages; and register to post to the discussions.
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 Alta Vista
A major Web search engine, also offering major categories to browse (Automotive; Business & Finance; Computers & Internet; Health & Fitness; Hobbies & Interests; Home & Family; Media & Amusements; People & Chat; Reference &
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 Alternative Instruction and Alternative, PerformanceBased Assessment  Jane Ehrenfeld; Math Forum
Two annotated bibliographies designed to present ways in which assessment can be altered without drastic restructuring of class and curriculum. Some of the articles and books referenced have links to portfoliobased instruction and assessment, and can
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 Alternative Math Club
Interactive practice with problems typically found in Japan: exams for junior high school math, high school math, and college math; and entrance exams for high shool and for university. Also available in Japanese.
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 Alternative or Block Scheduling  Mathematics Education at The Math Forum
The Math Forum's suggested sites on block scheduling, including Web resources, articles and reports, and discussions.
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 alt.math.recreational  Math Forum
An unmoderated newgroup focused on recreational mathematics. Read and search archived messages; and register to post to the discussions.
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 A+ Math
A site developed to help elementary school students improve their math skills interactively, offering: educational math games (learn basic operations and geometry by playing MATHO  bingo and math combined; Hidden Picture; and Concentration), Web flash
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 AMATH  AMATH Systems, Inc.
Software for Building and Reinforcing Foundation Mathematics. AMATH is a simple, selfpaced, self grading, computeraided workbook created to combat the math literacy problem in the U.S. It covers 103 modules of foundation mathematics
including: arithmetic,
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 Amazeing Art  Christopher Berg
Free printable mazes of buildings, ships, ancient monuments, and more. The site features historical essays describing some of the mazes of ancient times, together with maze terminology and tips on drawing mazes. There are also maze products for purchase,
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 The Amazing Abacus  ThinkQuest 1996
An exploration of the abacus. Learn to use the abacus and what it is for, and to speak and write Chinese numerals and formulas.
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 The Amazing ABC Conjecture  Ivars Peterson (MathTrek)
In number theory, straightforward, reasonable questions are remarkably easy to ask, yet many of these questions are surprisingly difficult or even impossible to answer. Fermat's last theorem, for instance, involves an equation of the form x^n + y^n =
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 Amazing Math Tutor San Diego  Sam Mirs
Oneonone inhome tutoring for algebra, trigonometry, geometry, precalculus, calculus and college math students in San Diego county. Blog posts, which date back to January, 2013, have included "The 7 Steps to Succeed in Math Tests," "The 3 main Questions
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 An Amazing, Space Filling, NonRegular Tetrahedron  Peg Cagle and Joyce Frost, Park City Mathematics Institute
The rhombic dodecahedron derives its name from its twelve ("dodeca") faces, all of which are congruent rhombi, each formed by joining two tetrahedra. In this article, Cagle and Frost explore these related polyhedra, showing how to exploit their space
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 Amby's Math Instruction, Reinforcement, and Learning Activities  Amby DuncanCarr
Stepbystep tutorials, with autoscoring quizzes: order of operations, solving word problems, properties of numbers, prime numbers, prime factorization, greatest common factors (GCF), least common multiples (LCM), simplifying (reducing) fractions, changing
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 America Counts  U.S. Department of Education
In 1997 President Clinton issued a Presidential Directive to the Department and the National Science Foundation to work together to devise an action strategy for using Federal resources in support of improving student performance in mathematics. The result
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 American Institute of Mathematics
The American Institute of Mathematics (AIM) "expands the frontiers of mathematical knowledge through focused research projects, sponsored conferences, and the development of an online mathematics library." See, in particular, the nonprofit organization's
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 American Mathematical Society Committee on Education  EMath  Web Site of the AMS
The Committee charge, membership, contact information, annual reports for prior years, and links to education pages on the site are available.
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 American Mathematics Competitions  Dr. Walter E. Mientka, Executive Director
The American Mathematics Competitions (AMC) seek to increase interest in mathematics and to develop problem solving ability through a series of competitions for junior/middle (grades 8 and below) and senior high school students (grades 912). They include
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 American Pi  Lawrence Mark Lesser
Song lyrics by Lawrence Mark Lesser, approximately to the tune of Don McLean's "American Pie." Read a PDF of the Texas Mathematics Teacher article Slices of Pi: Rounding Up Ideas for Celebrating Pi Day, and see Lesser's "mathemusician" page for more lyrics
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 American Scholastic Association
Home of the American Scholastic Mathematics Association (ASMA) Annual Math Contest for junior, intermediate, and senior high schools. Read about the contest design and general information; see a list of the year's high performers and their school affiliations;
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 America's Favorite Number (Math Chat)  Frank Morgan, MAA Online
Math Chat invited each reader to send in a number. The most commonly submitted number, with the best explanation of why, wins. Answer: In a tight race between 7 and pi, pi wins by a single vote...
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 AmeriStat  Population Reference Bureau and Social Science Data Analysis Network
Graphical and textual summaries of the demographic characteristics of the U.S. population: marriage and family; population estimates and projections; education, race, and ethnicity; income and poverty; foreignborn population; migration; children; older
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 Amlon Tutors
Private tutoring service based in New York City, covering the NJNYCT area. Math topics covered include: Elementary, Algebra, Geometry, Trigonometry, PreCalculus, Calculus, Sequential I, II, II, Statistics.
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 AMOF: The Amazing Mathematical Object Factory  Frank Ruskey
Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is a combinatorial object. AMOF is part encyclopedia and part calculator, a teaching tool that generates
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 Amortization Schedule
JavaScript calculators for figuring out loan amortizations, investment fees, debt payoffs, savings, timesheets, and tips; for simulating investments; and for comparing savings rates and mortgages.
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 Amplify U Learning Centre  Ahmed Harb
Academic tutoring in math and physics, with mentoring, and peer networking, for grades 712.
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 amte  Association of Mathematics Teacher Educators, Math Forum
A mailing list for discussions concerning teaching standards and practices at the K16 level. Read and search archived messages up through the list's last activity, in September, 2000.
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 amtnys  Math Forum
The general discussion group of the Association of Mathematics Teachers of New York State. Use this service to discuss items of interest to math educators everywhere. Read and search archived messages; and register to post to the discussions.
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 Analysis & Knowledge  Sanford Aranoff
Download data analysis software, such as Patterns, which analyzes and charts trends in stock market using Andrews concepts. See also this former Rutgers University physics professor and current high school educator's thoughts on teaching and help file
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 Analyzing Numeric and Geometric Patterns of Paper Pool (iMath Investigations)  Illuminations; National Council of Teachers of Mathematics (NCTM)
An online, interactive, multimedia math investigation. The interactive paper pool game in this iMath investigation provides an opportunity for students to further develop their understanding of ratio, proportion and least common multiple. Students develop
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 Ancient Mathematics  SunSITE's Vatican Exhibit; Library of Congress
Math history: math and astronomy in the ancient world. Greek Mathematics, Ptolemy's Geography, Greek Astronomy. Scholarship supported science in this world where faith and science were not yet seen as two irreconcilable cultures. Euclid (Elements, Optics);
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 Ancient Writings Revealed!  The Exploratorium
Ancient ideas met modern science at the Exploratorium, San Francisco, CA, on August 4, 2006. Using stateoftheart scientific tools, oncehidden writings by the ancient Greek mathematician Archimedes were uncovered, revealing evidence of science not
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 ... and Math Tutoring  Stuart Raffeld
This oneonone tutoring service meets tutees throughout California's West San Fernando Valley, and also tutors online, overthephone, and by email. Posts in Stu's blog, which date back to February, 2011, have included "Ten Ways to Improve your SAT
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 Andy Norton's Web Page  Dept. of Mathematics Education, Univ. of Georgia
Illustrated essays and explorations of algebra and geometry using various technology, including TI85 calculators, CBL's and computer software such as Geometer's Sketchpad (with sketches to download), Algebra Expressor, and Excel, by a grad student in
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