 11 Plus Exams  Nick George
Interactive math tests, with detailed explanations.
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 123math.ca  Math Made Easy
A program that supplies flash cards, number lines, learning lessons, audio material, emails, and telephone contacts with parents to help students master basic facts of addition, subtraction, multiplication, and division. Cost is $30 Canadian registration
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 12 Times Tables  Debbie Wickens
Worksheets and online tests for 12 times tables.
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 5 Numbers  Simon Singh and Marcus du Sautoy, BBC Radio 4
Web pages and Real Audio Music downloads of fifteen minutelong radio broadcasts that take a "quirky look" at zero, pi, the golden ratio, i, and infinity. "Hear about the stark reality behind the imaginary number, try a slice of pi, find out about the
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 The ABACUS International Math Challenge  Tivadar Divéki, Grace Church School
The ABACUS International Math Challenge is open to students in three categories (grades 34/ages 910; 56/ages 1112; 78/ages 1314), with 8 problems posed each month. The challenge begins in September and ends in April. It originated with the ABACUS
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 Abacus in Various Number Systems  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A Java simulation of the traditional abacus. Allows calculations in various number systems. The base ranges from 2 to 20. The tool inforces carry helping students grasp the idea of the positional, decimal in particular, number system.
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 About Zero  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about zero, such as whether it is even or odd, prime or composite, positive or negative, and different from nothing.
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 The Academic Advantage
Oneonone instruction in the convenience of your own home that focuses on academic improvement and building confidence. Math topics tutored range from basic arithmetic to trigonometry, from prealgebra to precalculus, from algebra to geometry, and also
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 Adding Integers (SMILE)  John Charles Thomas, N. F. Simeon Vocational High School
A lesson designed to teach students to add and subtract integers, and define terms (additive inverse, identity element of addition, associative property of addition, addend, sum, magnitude). From the Arithmetic section of a collection of almost 200 single
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 Adding/Subtracting Fractions  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about adding and subtracting fractions, including how to find common denominators.
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 Addition Flashcards  A+ Math
Elementary online flashcards for practicing simple addition.
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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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 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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 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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 The Algebra Project  The Algebra Project, Inc.
The Algebra Project seeks to impact the struggle for citizenship and equality by assisting students in inner city and rural areas to achieve mathematics literacy. Read about the project's teacher training and support programs such as MUSIC (MultiUser
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 All About Percents (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering finding, converting, and using percents.
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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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 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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 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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 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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 Answer Ace  MathSupport Co.
A Windows 95/98/NT math problem solver that helps students learn or review arithmetic, prealgebra, and basic algebra skills. Students enter specific problems and the software provides answers along with stepbystep help. A free trial is available for
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 Ant Math (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
Imagine stepping into a pitchblack room. How might you figure out the room's size in the dark? You could, for example, carefully follow the walls and count how many steps you took going from one corner to the next all the way around. That would give
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 Arbelos Internet Math Society  Bert Liberi and William F. Widulski, Westchester Communtiy College
A mathematics society dedicated to the pursuit of elegance in problemsolving. Every month, solve challenging problems that require "more imagination than memorization." Also, access old problems and solutions; and study a list of heuristics of problemsolving,
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 Arcademic Skill Builders
Online educational JavaScript arcade games that teach automaticity and fluency with the four basic arithmetic operations. Single player math games include Meteor Multiplication, Demolition Division, Alien Addition, and Minus Mission. Drag Race (division),
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 Arithmagic (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
Prof. Arthur Benjamin amazes audiences by multiplying numbers in his head faster than someone using a calculator. Benjamin says that anyone  young or old  can learn to do the same feats of mental arithmetic. All it takes is a memory for numbers and
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 ArithmAttack  David Baurac, Argonne National Laboratory
How many computergenerated arithmetic problems can you answer in 60 seconds? Choose an operation (add, subtract, multiply, divide, random operator) and high and low numbers (012). Enter an answer and check it; after 60 seconds the program will tell
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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 for Home Schooling  Bill Hemmer; Hemmer Publishing Company
A traditional program covering math from basic arithmetic through prealgebra, for grades 37, focusing on six subject areas: whole number, fractions, decimals, percents, measurement, and prealgebra. The order and format of the topics allow flexibility
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 Ask A Science/Math Expert  Stevens Institute of Technology, Center for Improved Engineering and Science Education (CIESE)
Links to science and math askanexpert services, organized into general science, astronomy and space science, biology and life sciences, physics, oceanography, geology, and weather.
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 Ask Jeeves for Kids  Ask Jeeves, Inc.
An easy question&answer site where kids can ask questions and find more questions on the topic to choose from. Example: Where can I find information on division?
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 Asymptopia Software  Charles Cossé
Free math games include TuxMathScrabble, which challenges players to construct compound equations in the manner of Scrabble; Multiplication Station, which provides practice in addition, subtraction, and multiplication; and MakeItTrue, a web application
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 Audiblox  Susan du Plessis
Audiblox is a system of cognitive exercises, aimed at the development of the skills foundational to reading, spelling, and writing. A resource for dyslexia, dysgraphia and other learning disabilities.
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 Bar Chart Applet  Robert Scott Mitchell
Enter values for the ten bars; control their orientation, and the scale of the chart at runtime.
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 Base Ten and Fraction Activities  Mike Gralish
Online math manipulatives for understanding fractional parts and
base ten operations
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 Basic Mathematical Operations Using Mathtiles (SMILE)  Claudia R. Jones, Farragut Career Academy
A lesson that uses manipulatives to teach students addition, subtraction, multiplication, and division. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 BEATCALC Archive  Math Forum
An archive of B. Clay's BEATCALC weekly mailing list. Amaze your friends by memorizing a few simple rules and doing mental math tricks faster than they can do them on a calculator. Squaring, multiplying, dividing, adding, and subtracting numbers; finding
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 ÜberFan  UberFan, LLC
"The fan's electronic baseball card," UberFan.com gives each fan ownership of Major League Baseball statistics by collecting them from the games he or she watches. Satisfy your curiosity for how many home runs you've seen your favorite batter hit, for
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 Big Daddy's Freeware  Vincent DiCarlo
Small, simple DOS programs to download for effective drilling of basic addition, subtraction, and multiplication.
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 The Biggest Story Problem  Scott Laidlaw and Jennifer Harris, Imagine Education
This independent documentary examines the "sudden drop in math scores and competency seen as students in the U.S. transition from primary to secondary schools." The film interweaves the stories of former teacher Scott Laidlaw, those participating in a
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 BizWorld: Real World Math
BizWorld is a real world math program in which students apply their schoolwork to the world of business. Handson activities correlated to National math, economic and social studies standards, lead students through the steps of starting and running businesses.
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 BLOSSOMS  Massachusetts Institute of Technology Learning International Networks Consortium (MIT LINC)
Video modules that enliven existing curricula with clips and support materials for inclass teachers to intersperse in active, goaloriented exercises. Each module includes a teacher's guide, downloadable handouts, and a list of additional resources;
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 Borrowing/Regrouping  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about borrowing, regrouping, and carrying, such as "When doing subtraction problems like 10099, why do the zeros become nines?" and "When you are subtracting a fraction, do you always take one away from the whole number?"
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 Bricks Activity  Suzanne Alejandre
A classroom activity (also called the Masonry Problem; a variation on polyominoes) aligned to the NCTM and California Standards, to be explored through manipulatives (dominoes). Students explore different possibilities of making brick walls with and without
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 Building Big  WGBH Educational Foundation
Explore great feats of engineering and the ingenuity of the engineers, architects, and builders who designed and built them. Learn about bridges, domes, skyscrapers, dams, and tunnels; use Flash interactive engineering labs to experiment with forces,
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 Candy Byte Software  Nily Aharon
Mathamagica, for ages 711, provides rigorous math skill practice within an animated, interactive setting with colourful graphics and characters. Concepts include addition, subtraction, multiplication, division, sequences, greater than/less than, telling
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 Can i play this at home  Greg Pallis
Free online math drill games set in the soccer context of the 2010 FIFA World Cup. Select any of the 32 participating nations, then convert goalscoring chances before time expires in your group matches and elimination brackets by correctly answering
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 Casting Out Nines
This essay explains the technique of casting out nines, a method of checking one's answers in arithmetic problems by eliminating groups of numbers that add to nine.
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 Chameleon Graphing: The Coordinate Plane  Ursula Whitcher
A Web unit that introduces the coordinate plane, for elementary and middle school students. With the help of Sam the Chameleon, learn to find points on a number line and graph points in the coordinate plane. See also Whitcher's companion units on Lines
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 Chasing Arrows (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
The reycling symbol looks like three bent arrows chasing each other around a triangular loop. You often find it printed on cardboard cartons, envelopes, greeting cards, packages, and trash containers. It's also an intriguing mathematical object. Imagine
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 Chess Math (SMILE)  Louis C. Jackson, Lincoln Elementary School
A lesson designed to reinforce students' knowledge of angles as they become chess
pieces on a floor chess board. From the Patterns and Logic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning
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