 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. Selfguided lessons, with glossaries and selfassessments, 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: K5 Math Software
Developer of elementary mathematics software for students in grades K5. 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 autoscoring, randomlygenerated 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, CDROMs 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, applicationsbased
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 LEDA Research  Michael Seel
LEDA is a library of the data types and algorithms of combinatorial computing. Try the OverTheNet 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 (Lineups)  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 lineups.
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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 differentsized 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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 The Let's Make a Deal Applet  West, Street; Dept. of Statistics, Univ. of South Carolina
As a motivating example behind the discussion of probability, this applet allows students to investigate the Let's Make a Deal Paradox (also known as the Monty Hall Problem, or The Three Doors). This paradox is related to a popular television show in
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 Levitated  Jared Tarbell
"Visual poetry and science fun narrated in an object oriented graphic environment." See, in particular, the generators in sketches and applications; and "open source," a library of fractals, cellular automata, spacefilling algorithms, "autofixing words,"
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 Lewis Carroll's Logic Game  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Discussion of an invention of Lewis Carroll's that competes with Venn diagrams for solving logical problems. Topics include the bilateral and trilateral diagrams, syllogisms, two Java applets, sample soriteses, and Carroll's Game of Logic.
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 Lezioni ed Esercizi di Matematica, Statica e Scienza delle Costruzioni  Y Studio
In Italian: Corsi di supporto per la preparazione di esami di matematica. Compiti di esame svolti, tanti esercizi e lezioni online.
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 The Lial/Hornsby Algebra Series Web Site  Addison Wesley Longman, Inc.
A site supporting the Lial/Hornsby Algebra series with additional practice, quizzes, tutorials, exercises, and information about the textbook supplements. For every chapter of each textbook, the site provides a glossary; InterAct plugin tutorial exercises;
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 The Lighter Side of Dr. Paulsen  William Paulsen
A collection of online games and puzzles: blackjack, The NonZero Difference Game, No Alibi (a mystery detective game), a haunted mansion labyrinth, sliding tile puzzles, and The Prime Maze.
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 Light Mixer  Cary and Michael Huang
Type "c" for cyan, "m" for magenta, or "y" for yellow, then click and drag in the grey box to draw a path of pigment in that color. Toggling the switch lets you "draw" in light on a black background: "b" for blue, "r" for red, or "g" for green. Regions
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 Lightning Reflex  Jason Lowe
Online math competitioncompete with people from all over the world. Every month features a different
area, such as timestables or addition. Requires Flash 6 or higher.
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 Linear Algebra Calculators  Marcus Kazmierczak
Java applet and scripts: Matrix Calculator (calculate the determinant, adjoint, inverse, transpose, and more of an 'n x n' matrix), Linear Algebra Calculator (calculate the determinant, adjoint, and inverse of a '3 x 3' matrix), and Linear System of 3
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 Linear Algebra Toolkit  Przemyslaw Bogacki; Old Dominion University, Norfolk, VA
A Web "toolkit" intended to help a student of linear algebra to learn and practice a basic linear algebra procedure, such as GaussJordan reduction, calculating the determinant, or checking for linear independence. Includes systems of linear equations
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 Linear Diophantine Equations  Stanley N. Burris; University of Waterloo
A calculator for solving Diophantine equations of the form ax + by = c.
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 Linear Equation Solver  Mark Chamness
A Java applet that solves three equations with three unknowns.
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 Line Designs for the Computer  Jill Britton
Line designs are created by connecting points on lines or curves with straight line segments. When carried out on cardboard with sewing needle and thread, the process is referred to as Curve Stitching or String Art. If the family of straight line segments
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 Line Graph Applet  James Brennan
An interactive applet: move a straight line and see the coefficients m and b of its equation.
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 Lines, Circles and Beyond  Cut the Knot!, Alexander Bogomolny
Third in a series of columns that draw on Frank Morley's fundamental paper On the Metric Geometry of the Plane nLine. Bogomolny's initial intention was to expose the simplicity of and the motivation behind Morley's original proof of his famous theorem.
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 LiveGraphics3D Homepage  Martin Kraus
A noncommercial Java 1.1 applet for displaying and rotating threedimensional graphics produced by Mathematica in HTML pages. The applet can show animations, calculate stereo graphics, integrate hyperlinks, and display bitmap backgrounds.
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 LiveMath  Theorist Interactive, LLC
WebShareable computer algebra and graphing software (formerly MathView/Expressionist / Theorist / MathPlus). LiveMath notebooks may be shared via the Web. They are similar to spreadsheets in that a change in one value will ripple throughout the calculations.
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 Live School Math  Mr. Ragle
Online math classes from PreAlgebra to Calculus, and tutoring. Based on the Saxon textbooks.
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 The Living Mathematics Project  Mathematics Department, Univ. of British Columbia
A project that is working to apply recent advances in computer programming languages and the technology of the World Wide Web to construct a new medium for creative visualization and the communication of mathematics. Applets on this site include: Copycat
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 Liz's Research Interests  Liz Bradley, Department of Computer Science, University of Colorado
Artificial intelligence projects include Chaography, a pair of tools that use mathematics to generate choreographic variations: Chaographer, which uses a chaotic mapping to generate variations on a musical piece; and MotionMind, which uses machine learning
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 Loan Amortization Calculator
Enter a loan amount, annual interest rate, and term of a loan in years or months to calculate payment information and an accompanying amortization schedule.
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 Loci  Mathematical Association of America (MAA)
Loci is a peerreviewed journal publishing articles, modules, applets, and reviews continuously as they are ready to be posted. Loci takes advantage of the World Wide Web as a publication medium for materials containing dynamic, fullcolor graphics;
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 Logicville
Anagram, chess, cryptarithm, cryptogram, doublet, logic, mathematical, magic word square, and tangram puzzles. Select a puzzle at random; solve the puzzle of the week. Interactive puzzles require Java.
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 The Long Island Consortium for Interconnected Learning (LICIL)
The Long Island Consortium for Interconnected Learning in Quantitative Disciplines is a comprehensive, interdisciplinary project aimed at improving how faculty teach and how students learn in mathematically based subjects. It combines change in modes
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 Lorenz Attractor: Simulation/Plotter  John Brecht
This program is a threedimensional plotting package and a numerical integrator. As an example, it is set to integrate the Lorenz Attractor problem. The applet features userdefined rotations of the coordinate system, depthbased shading of the colors,
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 LP Explorer  Hall, Baird; Univ. of Edinburgh, Scotland
A Java applet that enables the (standard) simplex method to be applied to a linear programming (LP) problem and allows the sensitivity of the solution to changes in the problem data to be examined. LP Explorer is of particular value for problems with
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