 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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 Aloha Gujarat
Courses for children of India's Gujarat state: abacusbased mental arithmetic, and speed calculations grounded in Vedic mathematics.
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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 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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 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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 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 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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 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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 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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 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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 Angela Andrews  District 86
Files shared during a Common Core State Standards (CCSS) Mathematics workshop by Andrews, host of the DuPage Children's Museum's Aunty Math site: Comparing Ordering Sequencing and Rounding, Dangers of Touch Math, Emergent Learner Activities, Experiences
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 Angles of Reflection  John Benson and P. J. Karafiol
A backandforth intergenerational blog on math education, begun in January, 2011, by two Presidential Awardees in Mathematics from the state of Illinois.
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 Animated Educational Software  FLIX Productions
Shareware for PC platforms, including programs designed to teach children about money, timetelling, shapes, math (counting, addition, subtraction for preK through 1st grade), and multiplication and division (for 1st3rd graders).
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 Animated Math Glossary  Math Advantage  Harcourt Brace School Publishers
A K8 glossary of common mathematical terms, categorized by grade. Each entry has an example, most of which are animated. An "other" section at the end of the alphabet gives tables of metric and customary measurements, time, formulas, and symbols. You
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 Ankhor  Ankhor Inc.
This online peertopeer tutoring service connects elementary and middle school students with nearby high school math tutors through their schools. Founded by Tanmay Rao while a junior in high school, the nonprofit's name combines "ankh," a Hindi word
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 Anna Stokke
Teaching, research, and other activities of the cofounder of the nonprofit Archimedes Math Schools and of the advocacy group WISE Math. See, in particular, the "advocacy & math education" tab for the mathematics professor's editorials and interviews
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 Annenberg Institute for School Reform (AISR)  Brown University
The Annenberg Institute develops, shares and acts on knowledge that improves outcomes of schooling in America, especially in urban communities and in schools serving disadvantaged children. Institute Projects: Rethinking Accountability; Building Capacity;
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 Annual Pi Day  The Exploratorium, San Francisco, CA
"Founded by the the Exploratorium's own Prince of Pi, physicist Larry Shaw, Pi Day has become an international holiday, celebrated live and online all around the world." Read a brief history of pi; find activities for cutting π and wearing π; and
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 APlusStudent Online Learning
Interactive math lessons with graphics, animation, and audio, based on Micromedia Flash technology. Teacherdesigned, standardsbased lessons. Parents can monitor the progress of their children. There is also homework help and an online gallery where
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 Appetizers and Lessons for Math and Reason  Alan Selby
Logic Appetizers to test or or improve reading, writing and thinking skills, with definitions, concepts and proofs in many subjects (Chains of Reason; One or TwoWay Implications; Islands & Divisions of Knowledge; Deception); Advice (How to Study
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 Apples4theteacher.com  Judy Miller
Free interactive early math learning games in JavaScript. Activities reinforce measurement, telling time, shapes, counting, tangrams, and counting money; and some have a specific holiday theme. Counting in Spanish, Polish, and Gaelic also offered.
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 Applications and Misapplications of Cognitive Psychology to Math Education  Anderson, Reder, Simon
A critical view of constructivism by three leading cognitive psychologists at Carnegie Mellon University. Decomposition and decontextualization; situated learning; constructivism; recommendations for research and instruction; overall conclusions; references.
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 Aquí Matemàtiques (Catalán)  Carlos Romero
Web and interactive materials in Catalán designed to facilitate and improve teacher training in mathematics. Goals: to provide curricular incentives for integrating technology into primary and secondary level teaching; facilitate access to curricula;
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 Arabic Mathematics  David Joyce; Dept. of Mathematics & Computer Science, Clark University
Resources on the history of Arabic mathematics, with a map, a list of mathematicians, sources, and a Bibliography.
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 Arabic Numerals (Islam and Islamic History)  Nawwab, Speers, Hoye; Arabian American Oil Co.
The system of numeration employed throughout the greater part of the world today was probably developed in India, but because it was the Arabs who transmitted it to the West, the numerals it uses have come to be called Arabic. This page shows the early
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 Archimedes' Laboratory  Gianni A. Sarcone and Marie J. Waeber
Archimedes' Laboratory invents, creates, and develops handson thinking games which help teach mathematical applications. They also create and manufacture original educational manipulatives and puzzles to support promotional activities. The resources
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 Archives of American Mathematics  The Dolph Briscoe Center for American History, The University of Texas at Austin
The only archival repository in the United States solely dedicated to collecting, preserving, and providing access to the records of American mathematicians and mathematical organizations for use by historians, mathematicians, educators, and others interested
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 Area and Diameter  NASA Lewis Learning Technologies Project
Mrs. Bosley wants a big round piece of plastic to throw over her little boy's round sandbox to keep the sand clean. The sandbox has a diameter of 3 meters. Approximately how big will the round piece of plastic need to be? A detailed answer is provided.
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 Area Under Curves: The Integral  Don Cohen (The Mathman)
Area on the geoboard; Plotting points on a computer or programmable calculator to find the area under curves; Finding the area under curves on graph paper. Sample problems with some answers and a program to plot points  from Chapter 13 of Don Cohen's
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 Are You Better Than Average?  Todd Curtis
Dice game developed to quickly demonstrate some of the basics of probability. You'll need one pair of dice, a throwing tray or other flat surface, and a score sheet.
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 ArithmaClick  J. D. Brown
Practice addition and multiplication while keeping score.
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 Arithmemouse  Tinman Learning, Inc.
Arithmemouse Times Tables is a multiplication game that facilitates teaching children multiplication factsnot just a drill. It is nonviolent, with light puzzles, and without life meters or punishment for failure. A free demo is available. Arithmemouse
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 Arithmesticks  Michael Varma, Magical Concepts
Simple equations made out of sticksmove one stick to make the equation correct. This site has example problems in each of the four basic operations, and sells kits of sticks and equations cards.
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 Arithmetic and Algebra Review Problems  Alan Selby
Arithmetic and algebra review problems to help people check or diagnose arithmetic skills and other calculation or algebra skills. Includes a 20x20 times table.
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 Arithmetic CD  John Banfill
The Arithmetic CD contains over 1700 basic arithmetic lessons for K8 students. Each lesson has an explanation, some interactive practice, and challenge games. The lessons on the CD consist of interactive html files and require a web browser to operate.
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 Arithmetic  Math Forum
Links to some of the best Internet resources for arithmetic: classroom materials, software, Internet projects, and public forums for discussion.
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 Arithmetics WARM UPS  Cornick, Jonathan; Guy, G. Michael; Russell, Andrew S. H.; and Holt, Robert J.
This free, open, online supplement to the Arithmetics WARM UPS Textbook provides practice with place value, arithmetic, order of operations, word problems, and more. Rendered in MathJax, each "lab" in this "no calculator zone" instantly scores multiple
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 Arithmetiles: Speed Math Skills
Online game to warm up your brain with fairly easy math challenges. Downloadable versions available for purchase.
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 Aritm  Mikael Bonnier
A Java applet for simple mental calculation, drilling on basic arithmetic (addition, subtraction, multiplication, or division, with 1 or 2digit terms), in digits, words, or Roman numerals. It will tell you when your answer is wrong, and how many problems
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 Articulation in Mathematics Education  EXTEND  Perspectives in Mathematics Education
Links to articles on creating smoother transitions between education and work, between school and college and within sectors of higher education, and about preparing teachers to facilitate these transitions and students to respond to new environments.
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 The Art of Asking Thought Provoking Questions in the Mathematics Classroom  Carmen Bellido, Uroyoan Walker, Keith Wayland
A position paper in PDF format: a "How To" guide for developing higherlevel conceptual questions that provoke students to think. Several techniques for modifying traditional questions are illustrated with examples ranging from elementary to high school
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