- KenKen @ the Math Forum - Nextoy, LLC and the Math Forum @ Drexel
A collection of KenKen puzzles ranging in size from 3x3 to 9x9, at four difficulty levels, with many combinations of arithmetic operations. The site offers an introduction to KenKen, lesson plans, rules, discussion, and tutorial. KenKen is a number puzzle
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- Ken Monks's Software - Ken Monks; University of Scranton
Links to some programs written by the author, as well as by others, that have been useful in his mathematics courses. Ken Monks's software includes RevSolid, a Maple program for making animated plots of solids of revolution; STEENROD, a Maple program
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- Ken Shirriff
A researcher at Sun Microsystems. Annotated bibliographies on fractals and cryptography, and related papers, which may be downloaded in PostScript format. Graphics of Voronoi fractals (dividing the plane into regions closest to a given point) and fractals
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- The Kepler Conjecture - Thomas C. Hales, Samuel P. Ferguson
The authors claim to have proved the Kepler Conjecture, that no packing of equal-sized spheres in space can have greater density than that of the face-centered-cubic packing. The full proof is included in over 250 pages of postscript format, with in addition
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- Key Curriculum Press
Publisher of innovative texts and software applications for teaching mathematics including the Geometer's Sketchpad (dynamic geometry), Fathom (dynamic statistics), TinkerPlots (dynamic data exploration and analysis), Michael Serra's textbook Discovering
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- Keyed-In Magazine - nelsonthornes.com
Weekly puzzles, quizzes, features of great mathematicians, fun with numbers, and strategy games. An Internet quest and "the serious stuff" offer self-scoring problems. Teacher resources provide links and ideas for each chapter of the Nelson Thornes Key
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- Keynesian IS-LM Model of the Canadian Economy - Elmer G. Wiens; Egwald Web Services Ltd.
Macroeconomics model of the Canadian Economy based on the Keynesian IS-LM
model. Illustrated article with interactive supplemental page.
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- KidsBank.Com - Sovereign Bank
A tutorial site in the form of an animated storybook that teaches about money, from the penny to the transfer of electronic funds. Children join characters on a tour of Money, Savings, Interest, Checking, and Electronic Banking, five chapters each hosted
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- Kids Corner - Hope Paul Productions
Games to play online, and a demo to download: Solid Geometry (make your own 3-dimensional shapes), and a store where you can order math toys and games.
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- Kids Math
Elementary and intermediate drill exercises/games (timed, with answers shown correct or incorrect) for learning addition, subtraction, multiplication, division, fractions, decimals, measurement, graphs. In English, Spanish, and Chinese. Also pre-algebra
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- Kids Math Games Online - Rene Smith
Free interactive games on addition, counting, division, geometry, money, multiplication, number (including mean median mode), problem solving (bridge crossing, hourglass time, wolf and sheep), and subtraction. Logic games include a 3D puzzle cube, Mastermind,
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- KidsNumbers - The KidsKnowIt Network
KidsNumbers' most popular single-player games count down against a clock: Add It Up, Lake Mathatobie (addition), Turkey Terminator (fractions), Number Drop (basic operations set to a Tetris-like challenge), St. Pat's Math Adventure (basic operations).
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- KidsPsych - Magination Press
Flash games to help young children develop cognitive thinking and deductive reasoning: Oochina on the Farm, Rotating Faces, Oochina in Space, I Spy, Oochina the Archeologist, Oochina's Doughnut Dilemma, Oochina the Treasure Hunter, Oochy's Cube Adventure,
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- Kinetic Books
A line of interactive textbooks that take advantage of computers by including simulations, animations, audio, video, multiple self-assessment tools for students, scoring, and much more. Digital Algebra I textbook offers online demo, trial version, or
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- Kirigami - Kevin S. Whitley
Kirigami is the Japanese art of making figures out of paper by cutting. This applet lets you create similar figures on your computer by cutting a polygonal wedge from a virtual piece of folded paper. You can change the regular polygon, your wedge, and
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- KitchenMath.com - MotionNET.com
Submit fraction or decimal amounts for conversion into pinches, dashes, teaspoons, tablespoons, fluid ounces, cups, pints, quarts, and liters. Scale quantities using the "multiply values by" field.
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- Kitchen Table Math - Catherine Johnson
A collaborative weblog that began when Johnson's son "... finished out the school year with a 39 on his Unit 6 test, Fractions and Decimals.... Later on I discovered that fractions are the 'bottleneck' in elementary mathematics; lives are lost in the
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- Knight's Tour - Gunno Törnberg
Describes two methods for finding Knight's Tours (paths for a chess knight to visit every square on a chessboard), backtracking and Warnsdorff's Rule. Java applets demonstrate both methods.
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- Knowhere - Rick Engel; Polymorf, Inc.
Lesson on how the structure of space determines the
shape of things in geometry and chemistry. The
principles of solid geometry are related to their real life
embodiment in the crystal structures of elements and
minerals using Polymorf, a new math/science
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- Knowledge Online Services - Knowledge Online Services
Online tutoring services for all the subjects in grades K-12 and undergraduate college level. Free trial session.
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- Kognitia - Kognitia
Through games such as K Tycoons, Kognitia offers classrooms challenging competitions with other classrooms. Take a guided tour; register online.
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- The komplex plane - Travis Kowalski
Kowalski's problems, animations, tutorials, and other "mathlets" focus on calculus. See also the jokes collected by this professor at South Dakota's School of Mines, and his blog of math musings that wonder at the mathematics in everything from quilts
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- Kostur's Postulate - Don Kostur
A Shockwave tool designed to teach numbers to toddlers and preschool age children.
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- KRN Software
Free online games for Java-enabled browsers. Java Edutainment games require matching shapes and colors in Space Cargo and Cargo Bay, simple addition in Numeric Defenders, and odd and even number identification in Even Steven, Jr.
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- Krypto - The Making People Happy Games Company
Krypto game play begins by dealing five cards, each with a positive integer. Use any of the four basic operations to arrange the first four numbers into an arithmetic equation that yields the fifth "objective" quantity. Play online with a Java-enabled
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- Kumo - Joseph Goguen et al.; University of California at San Diego.
A Web-based proof assistant that assists with proofs in first order hidden logic, using OBJ3 as a reduction engine. The most important inference rules in first order logic and hidden equational logic are implemented, including induction and coinduction.
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- kwizNET Learning System - kwizNET Learning
Automatically generated quizzes and worksheets, based on widely recognized curricula. Includes progress indicators and award certificates to keep students motivated.
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- Labyrinth - Peter Kishalov
An online puzzle: choose the correct door to advance through the labyrinth, based on logic puzzles similar to those published by Raymond Smullyan in his book The Lady or the Tiger?.
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- Lammas - Peter Fox
A simple game of logic using a number of differently coloured tiles arranged in a grid. The object is to convert the complete grid to tiles of a single colour. The rule for conversion is given by the four tiles at the top left corner as a template. A
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- Latitude/Longitude Distance Calculation - Chris Michels
Calculate the distance between two points on the earth given their latitudes and longitudes. Choose the units for results: statute miles, nautical miles, or kilometers. With links for determining the latitude and longitude of places using a GPS, of a
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- Latitude/Longitude Position Finder - Juggling Information Service
Identify the latitude and longitude position of any point within the contiguous United States by clicking on the map to zoom in on the area.
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- Learn.co.uk - Guardian Education Interactive Ltd.
Interactive resources for learners to support Great Britian's national curriculum. Self-guided lessons, with glossaries and self-assessments, for key stage 2, key stage 3, or key stage 4 cover numbers; shape, space, and measurement; handling data; algebra,
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- The Learning Box: K-5 Math Software
Developer of elementary mathematics software for students in grades K-5. Featured titles include The Manipulative Math Series: Logic Blocks, Base Ten Blocks, and the Peg Board (learning about sets). Shockwave Flash activities include Flowering Fractions
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- Learning Epipolar Geometry - Sylvain Bougnoux
A discussion of camera angles, using demonstration applets that allow the user to manipulate lines of sight and planes of vision. With two views, things become interesting: if we know m and the projection of a point M onto a camera, its corresponding
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- LEARNINGlover - AfterMath
Resources to understand "the interactions between mathematics, computer science and probability." JavaScript flash cards and implementations -- each with auto-scoring, randomly-generated problems, some with pseudocode -- include the a priori algorithm,
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- Learning Math - Annenberg Media
The Annenberg Foundation and the Corporation for Public Broadcasting (CPB) use media and telecommunications to advance excellent teaching in American schools. Video programs with coordinated Web and print materials are offered for the professional development
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- Learning Planet - Michael Schipper
A site that offers online interactive learning games, in Shockwave, stressing basic math (and other) skills for preschool to sixth grade. Games include Number Train, 123 Order, Count Your Chickens (all number learning games); Spacey Math (four basic operations);
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- Learning to Reason - Nancy Rodgers, Hanover College
"When we reason within a logical framework, words must be manipulated according to the rules of the game...." Learn about the terms "not," "and," "or," "implies," "is equivalent to," "for all," and "for some"; logical reasoning and expressing it in writing;
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- Learning Wave Communications - Human Relations Media
Learning Wave is a producer of videos, CD-ROMs and other supplementary materials for math education including interactive games such as Absurd Math. Under the name HRM Video it has created programs such as middle school math mysteries, applications-based
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- LEDA Research - Michael Seel
LEDA is a library of the data types and algorithms of combinatorial computing. Try the Over-The-Net Demo which allows you to play with some computational geometry algorithms provided by LEDA; download commercial or research packages and licenses; read
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- Lee's Roman Numeral Converter - Lee K. Seitz
Convert a number into Roman numerals and back again online. Site also includes a brief introduction to Roman numerals, a FAQ, and some comments on the structure of the converter program.
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- Les Files d'attente (Line-ups) - D. Thiery, S. Jaeger
Une modélisation des files d'attente dans la vie quotidienne, avec une simulation. This site is in French, but the Java applet allows anyone to simulate line-ups.
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- Les quatres opérations sur les nombres entiers - Gilles G. Jobin, Projet Diderot
An interactive course, with extensive use of the Geometer's Sketchpad. Sommaire: Introduction générale; Conseils techniques; Une définition des nombres entiers; L'addition; La soustraction; La multiplication; La division; La priorité
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- Lessonopoly - Silicon Valley Education Foundation
A free tool that lets teachers manage their classrooms, find and share lesson plans, and connect with other teachers.
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- The Lesson Plans Page - Kyle Yamnitz, Univ. of Missouri
A searchable archive of over 300 lesson plans in math, science, social studies, music, art, language arts, etc., written by Yamnitz and other members of the University of Missouri. Lesson plans are separated by subject and grade level, and users can add
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- Lessons on Regression at Hessian - Web Feats Workshop II
Use the applet and the geese at Hessian Lake, located in Bear Mountain, New York, to find the line of regression. This workshop was supported by the National Science Foundation through a grant to Duke University for the PostCALC Project and by the The
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- Letopweb.org
Des jeux éducatifs pour mathématiques au primaire: connait les chiffres de 0 à 9; pratique le carré des tables de multiplication; retrouve la figure qui correspond à celle de gauche; fait des exercices de calculs; apprend
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- Let's Count! - Cynthia Lanius
Colorful, busy (sometimes too busy for adults, but children are drawn to them) activities for learning to count. The activities can be done either on computers with Internet access (optimally), or they can be printed out and used as a paper and pencil
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- Let's Do Math! - Cynthia Lanius
Maria and Cassie love doing math. The first problem they solve together is counting all the squares on a checkerboard - not just the individual squares, but all the different-sized squares that could be counted. Other Do Math problems include probability
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- Let's Graph! - Cynthia Lanius
Canga Rue Middle School conducted a survey of all its students to determine some of their interests. A graph illustrates the results of one of the questions. From the information provided, answer the following questions: - How many students are at Canga
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