 0h h1  Martin Kool
A "little logic game" related to Takuzu and Binario: complete grids of 4 × 4, 6 × 6, 8 × 8, or 10 × 10 so that all rows and columns have an equal number of each color, but none has three adjacent tiles of the same color or shares the
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 12 Times Tables  Debbie Wickens
Worksheets and online tests for 12 times tables.
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 17Calculus
Concepts, examples, videos, and practice problems to help students better understand the concepts of precalculus, single variable calculus, multivariable calculus, and differential equations. Formerly known as MathZar.
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 24 Theory
This "hobby website" offers JavaScript that calculates, enumerates, and displays all distinct solutions and solvable scenarios to the popular arithmetic card game, as well as interactive tables. 24theory.com also provides an online version of the 24 game
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 2Learn.org  Linda Blumenthal, Thinkwell Corp.
Offering a variety of products including a comprehensive learning plan, created online. Many free resources for teachers, parents, and students, as well. Math games and tools.
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 3.1415926...  TWON, INC.
This visualization of the first four million decimal digits of π shows each of the digits 09 as a different colored pixel. Slide the navigator down to see the numeric "snow" representing the digits 500,001 through 4,000,000; search for any number
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 3D Drawing and Geometry  Cathi Sanders
A Math Forum Summer 1998 Institute project that uses examples of paintings, architecture, etc. to analyze different types of 3D drawings, and teaches students how to create them. Careers in 3D drawing that use these techniques, from architecture to
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 3D Nauta
A threedimensional spatial, topological problem/game with Web interfaces in Spanish, French, and English. Of two versions of the game, one is accessible
to most people, while the other can be made difficult exponentially. You are invited to order your
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 5 x 5 Magic Squares  H. B. Meyer
An interactive page dedicated to the construction of 5 x 5 magic squares. You may move the numbers manually, watch the computer slowly create a magic square, or have the computer quickly generate a magic square. Requires JavaScript.
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 8 is Great: Math Games
Addition, multiplication, and division practice at the elementary level. Tips and tricks offered for 9 and 11 times tables, factoring a quadratic expression, and generating the Fibonacci sequence. Also includes a sudoku puzzle.
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 9th Grade Math Proficiency Test  NASA Lewis Learning Technologies Project
9th Grade Math Practice Questions to test addition, multiplication, wordproblem skills, and basic algebraic skills. Includes answers and explanations. From the Proficiency Building Activities of the NASA Lewis Research Center K12 Program.
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 AAA Math  John Banfill
Online interactive lessons, exercises, practice, and games about basic arithmetic concepts and methods, for grades K8. Topics include addition, comparing quantities, counting, decimals, division, estimation, factors, fractions, money, multiplication,
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 Aard 3D Puzzles  AardAsNails Software
Rubik's cubelike puzzles to solve online. Virtually twist and spin a pyramid, cube, diacube, or diamond, selecting solid or transparent views. Purchase the full version for up to ten levels of difficulty and preset problems.
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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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 AbakBot
Online calculators for determining an arbitrary number of the Fibonacci sequence; solving Diophantine equations; calculating the roots of a cubic complex equation; finding the area of intersection of the circles on the plane; calculating the shortest
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 ABCya.com  ABCya.com, L.L.C.
Free educational math games that introduce basic computer skills: Geometry Practice, Addition with Manipulatives, Subtraction Match Game, Math Facts Basketball, Interactive 100 Number Chart, Math Bingo, Place Value ShootOut, Fraction Tiles, Tower of
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 About a Line and a Triangle  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
An interactive page illustrating how the relation between the vertices and the sides of a triangle can be investigated by rotating the triangle.
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 About Rubik's Cube  Dan Knights
See the author's collection of Rubik's cubes, his solution and timing methods, thoughts on solving Rubik's Cube with your eyes closed, and suggestions for lubricating your cube and where to get them.
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 ABsurd MAth: Prealgebra from another dimension  Michael Cain; HRM Video; LearningWave Communications
An interactive problemsolving game series where the ultimate power consists of mathematical skill and knowledge. Many pages have hidden clues and areas; when players need help, they may email the staff for assistance. Teachers and parents may request
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 Academy123
From the creators of NutshellMath Homework Help. Prerecorded minilectures and ondemand homework help. Choose a major math textbook for tailored Flash chalkboard demonstrations that feature color ink strokes accompanied by a teacher's voice. Covered
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 A+ Click K12 Math Quiz
A+ Click is a free online math quiz. Assess your math skills from grade 1 to grade 12; you may move up a level if you give 5 correct answers in a row. Also available in Russian.
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 Active Algebra  David Womersley, Active Maths Limited
Interactive resources designed to enhance and enrich the teaching and learning of algebra. Free trial version available online; buy the CD and get a password which will remove the evaluation logo from those versions. All the activities can be used either
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 Active Elementary Number Theory: n^{2} + 1 and coprime increasing pairs of different parity  H. B. Meyer
An interactive study of coprime increasing numberpairs of different parity and their relations to divisors of n2 + 1. Requires JavaScript.
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 ActivePrompt  David Wees
"A different framework for gathering information about what your class understands": upload an image, key in a prompt (e.g., "Where does circle number 5 go?"), and ActivePrompt combines them into an interactive poll to canvas your students. By aggregating
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 Active Worksheets  David Womersley, Active Maths Limited
Formerly known as the Worksheet Factory, you can create worksheets online for an annual subscription fee: click on the "change" button and watch the numbers, angles, shapes or equations change; click on the "print" button to print a pupil worksheet and
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 Adding Feet and Inches  NASA Lewis Learning Technologies Project
If Sally places a 3 feet 6 inch tall rocket atop a 1 foot 8 inch tall launch pad, how tall will the entire unit (rocket and launch pad) be when she is done? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Addition and Multiplication Tables in Various Bases  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
An applet that combines addition and multiplication tables for bases from 2 through 36. In every base N, there are N digits. In the decimal system, for example, we have 10 of them: 0,1,2,3,4,5,6,7,8,9. In base 7, there are seven digits: 0,1,2,3,4,5,6.
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 Addition Flashcards  A+ Math
Elementary online flashcards for practicing simple addition.
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 Add It Up  CleverMedia
Combine tiles that sum to the target number. Earn extra points for combining more tiles or consuming less time; win a bonus for using up all the tiles; lose points points for every tile left on the board. Requires the Flash plugin.
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 ADIFF: Automatic Differentiation Utility  Juan Sanchez
Symbolic derivatives calculator, performs symbolic differentiation of common functions. Allows specification of arbitrary functions and their derivatives for evaluation.
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 Advanced Data Visualization  Principia Mathematica
PMVisualization Studio is a Microsoft Windows 95, 98 or NT application that takes the Visualization Toolkit (Vtk) data visualization architecture and extends it by providing a graphical pipeline editor. It also includes an Active X control that allows
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 Adventures in Statistics: Cartoon Learning Modules  Ralph Vacca
Available on CDs and online, this 80minute interactive supplement utilizes humor, animations, and engaging storylines to maximize students' understanding while eliminating the "statistics anxiety" that often interferes with learning. Demo available online.
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 Aesthetics of the Prime Sequence  Turpel Armand
A brief introduction to prime numbers, with a primality testing applet, a page on primes and music, primes and nucleotide bases, primes graphics, idiot savants and primes, primesrelated software, related links, favorite books, and a special page of Lyapunov
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 AgentSheets  AgentSheets, Inc.
A combination of enduser programmable agents, spreadsheets and Java authoring tools. The new version of AgentSheets lets endusers build a wide range of applications that include interactive simulations, games, and intelligent web agents. Projects created
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 Aha!Math  Learning.com
This K5 curriculum package, aligned to state and Common Core standards, supports differentiated instruction with multiple instructional models. Aha!Math provides students with immediate feedback in interactive story settings. Freely sample games and
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 AIMS Education Foundation
"Activities Integrating Mathematics and Science." A nonprofit, independent organization established to develop integrated math/science materials for grades K9. See, in particular, the AIMS Puzzle corner (a new puzzle each month), the AIMS@Kids Interactive
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 AJ Design Software  Jimmy Raymond
Provides various math, science, and engineering calculators. Calculators include geometric shapes, constant acceleration motion, ideal gas law, pipe flow, Reynolds number, venturi meter, and quadratic equation.
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 Alan Hensel's homepage  Alan Hensel
Instantaneously convert from decimals to fractions, as you type, with this JavaScript calculator. Hensel, a software developer, also offers a Java version of Conway's Game of Life, as well as interactive Twixt Quarterboard puzzles (Ajax) and a Twixt commentator
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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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 Algebra1: Graphing Linear Equations  Tim O'Brien
A Master's Degree project designed to provide an understanding of the graphing of linear equations at the Algebra 1 level. Use Java applets to learn about ordered pairs, graphing equations, horizontal lines, vertical lines, slope, equations and slope,
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 Algebra Calculators  Wanja Hemmerich
Online calculator that solves, simplifies, and factors, showing each step with formatting.
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 Algebra Equation Worksheet Generator  David Craft
A free Webbased tool for making customized algebra worksheets. It includes linear equations, systems of linear equations, and quadratics; the teacher can choose whether or not to include fractions and negatives.
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 AlgebraLAB: Making Math and Science Connections  Mainland High School (Daytona Beach, FL), Georgia Southern University
Created by mathematics and science teachers, AlgebraLAB is designed to focus on topics and skills from high school mathematics that students must be able to draw upon in their introductory college science courses. AlgebraLAB focuses on lessons and practice
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 Algebra Lineal  Juan M. Olazabal
Material suplementario al curso reglado de la Facultad de Ciencias de la Universidad de Cantabria, España. Mira, en particular, el formulario para eliminación Gaussiana. In Spanish: an introduction to Linear Algebra: matrices, rank, echelonforms,
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 Algebra matricial  Cristina Díaz Sordo y Luis Vaamonde Portas
Disfruta del álgebra usando la calculadora matricial y los generadores de
prácticas, ejemplos, ejercicios y tests de autoevaluación
diseñados en Javascript.
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 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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 Algorithms  National University of Ireland
Web interfaces that provide steps for moving the disks of the Towers of Hanoi, calculate the Euclidean greatest common divisor (GCD) algorithm using recursion, and compute maximum profit from the knapsack problem using dynamic programming. Also, generate
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 Alice begegnet der 4. Dimension  Stefan Scheller
(Alice encounters the 4th dimension) Einige faszinierende 3DAnimationen hat diese Homepage zu bieten. "Alice begegnet der vierten Dimension" ist hauptsächlich eine umgeschriebene Kurzversion der bekannten skurilen Kindergeschichte aus England. Der
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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 Addition (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering addition facts and
addition of whole numbers, decimals, and fractions.
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