 Kakuro Puzzles  JAKRO Soft LLC
Free printable crossword puzzles that use sums instead of spellings, offered at difficulty levels of easy, medium, hard, and "evil." See also JAKRO's apps and page of tips for solving kakuro.
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 Kids First  Coalition for Quality Children's Media (CQCM)
The Coalition for Quality Children's Media evaluates children's media, and is a resource center and clearinghouse for children's media that helps parents and kids find good adultapproved and kidtested programming. A searchable video and CDROM database
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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 singleplayer games count down against a clock: Add It Up, Lake Mathatobie (addition), Turkey Terminator (fractions), Number Drop (basic operations set to a Tetrislike challenge), St. Pat's Math Adventure (basic operations).
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 The Kid's Pages  Rob Rogoski and Bill Pierson
Online "worksheets," each with 30 randomly generated problems in addition, subtraction, multiplication, or division. After submitting answers, get back a page of results that diplays your name, individual answers checked right or wrong, overall percentage
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 Kids SyvumBook Series  Syvum Technologies, Inc.
Interactive educational software for English, Knowledge, and Math, targeted for kids ages 612. Each Kids SyvumBook offers multimedia strips and main activity frames. Four levels of Math SyvumBooks help improve arithmetic, algebra, and basic number skills
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 KIDware Educational Software  Lou Tylee, KIDware
Educational math software for Windows. Elementary programs, programming tutorials, and realworld math tutorials for higher grade levels. Commercial site, with some free programs.
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 King of Mnemonics  Anton Prasolov
Prasolov's Hermes tables, alongside poems such as "fact dense fogs warm suns defy," help you remember mnemonics for determining large cubic roots, weekdays from dates, and more. Demo or purchase his King of Mnemonics (KoM) Windows software. Inspired by
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 Knowledge Adventure
A developer and publisher of interactive multimedia products for kids and educators. Products include the Blaster Series (Math, Spelling, Writing, Reading), FisherPrice Ready for School, JumpStart activities for elementary grades, and Kaplan Higher Scores
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 The Knowledge Tree, Inc.
3D modelling and mathematics software, for a wide range of educational levels. Dealers for Aspex Software, Greygum Software, and the Math Circus programs.
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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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 Komodo Math  Komodo Learning Ltd
Adaptive learning software for maths fluency through home practice on the iPad. Children start Komodo by taking a diagnostic test; then a UKqualified maths teacher assigns a personal learning plan. During "little and often" sessions of animated lessons
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 Ko's Journey  Scott Laidlaw and Jennifer Harris, Imagine Education
A webbased middle school math game, animated in 3D, for school or home use. Track student progress through this NCTM Standardstabled, storybased adventure. Try a demo; purchase licenses tailored for individuals, classrooms, schools, or homeschooling.
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 LatticeWork Software, Inc.
Shareware for Windows, both educational and entertainment. Includes three math programs, plus various familyoriented strategy/logic games. Available for personal or school use.
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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 Clip  Learning Clip Ltd
Primary maths whiteboard activities, worksheets, Activexpression resources, games, and more. See, in particular, Learning Clip's free resources.
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 Learning Games Lab  New Mexico State University Board of Regents
Designers of educational games such as MathSnacks, Ratio Rumble, Gate, Game Over Gopher, Monster School Bus, and several on food preparation, water conservation, kitchen safety, and health science.
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 Learning in Motion
Learning in Motion creates and publishes innovative software for K12 education. Monthly listing of the Top 10 Educational Web Sites; Knowledge Forum, a student knowledgebuilding environment; Measurement in Motion, a math/science learning tool (demo
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 Learning Jolt  Robert Croisant
"Quick and repeatable" mathematics problems for students, who gain points at specific milestones which they may then use to choose their own rewards in the Learning Jolt store. With statistical reports and other tools for parents and teachers to track
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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 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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 Learn Math 3D on Orbital One  Peter Richards
A software math course set within a real time 3D environment. Topics covered include counting, the number system, addition, subtraction, multiplication, division, 2D and 3D shapes, simple fractions, and telling the time.
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 Learn To Tell Time  Softseek.Com
Several educational shareware titles for DOS and Windows for learning to tell time, some animated.
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 Learn With Trek  NECTAR Foundation
Learn With Trek develops and markets curriculumbased mathematics software, developed by teachers, for grades K12. Each program uses engaging interactive technology to help students develop their math skills. Some products are designed as remediation
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 LearnZillion
A free learning platform that combines screencast video lessons, lesson commentaries, assessments, and progress reporting. Explore lessons by Common Core State Standard (CCSS) in math.
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 Leone Learning Systems  TJ Leone, Leone Learning Systems, Inc.
Online courses for kids anywhere, and local teaching and tutoring services for students in Chicago and the Northern Suburbs of Chicagoland. LLS provides a free geometry software package for children age six and up, and free resources for teachers and
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 Lernen Experimental  Lernen Experimental GmbH
"When blackboard images learned to move ..." Products include software that takes static blackboard images produced during conventional mathematics lessons, and converts them into dynamic, interactive screen experiments. The learning software for the
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 LiveSudoku  LiveSudoku.com
Play Sudoku free online at four different levels: beginners, medium, hard, and "wicked." The JavaScript game's options include pencil markings, highlighting, and solution checking. LiveSudoku.com also offers tutorials, tracks player performances on current
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 Living Graphs  Living Graphs Inc.
Makers of ChaosLab, an interactive math package for visualizing and understanding fractal geometry and chaos theory. This PC software title covers bifurcation diagrams, the chaos game, coin tosses, diffusion limited aggregation, Levy flight, Pascal's
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 l'île des mathématiques  Tom Pascal
"L'île des mathématiques propose des cours et des exercices de maths et de
physique.
Il est possible de télécharger les nombreuses fiches.
Aussi bien pour les élèves que pour les professeurs de collège et de lycée.
Des forums gratuits d'entraide sont
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 Logo in Mathematics Education  Don Beaty
Sections introducting Logo and its use in the classroom, as well as Illinois Learning Goals (state standards), and a series of juniorhigh level lessons aligned to those standards.
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 Logotron Educational Software
A U.K.based division of Addison Wesley Longman, Logotron publishes educational software for schools in numerous subjects, including mathematics, datahandling, multimedia, internet, earlylearning, and crosscurriculum. All are tied to key stages where
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 Lsquared  Laura Shears
Educational Flash and other software to "help facilitate both necessary basic skills as well as play to figure out concepts" so that students "learn how to think about math instead of memorizing procedures": algebra, arithmetic, art, demonstration tools
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 Make The Number  Carlos Lawton
Inspired by the arithmetic game 24, this app for iPhone and iPad presents four numbers and the standard operations to combine to make a fifth number.
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 Making Mathematics  O'Reilly Media, Inc.
Learn mathematics by making math with Hilbert, an online version of Mathematica. The Making Mathematics syllabus and course platform presents students with computational examples to explore  and challenges them to create their own.
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 Mangahigh.com Math Games  Blue Duck Education Ltd
A gamesbased math learning environment built around the UK's national curriculum. Mangahigh.com's online quiz game, Prodigi, adaptively coaches students aged 1016 with worked examples, full hints, and solutions. Other interactive games include "Save
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 MASTER Tools: Modeling And Simulation Tools for Education Reform  Shodor Education Foundation, Inc.
Interactive models and curricular materials, including: a galaxy simulation, fractal modelling tools, an energy minimization program using simulated annealing, biomedical and environmental models, a graphing tool with animation option, and a simulation
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 Math500.com  Joe Cunningham
Selfguided problems to solve with automated feedback based on the strategy you select from among the multiple choices presented at each step, or upon the intermediate calculation you enter. Worked examples provide additional stepbystep support. Choose
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 Math Adventures  George Gadanidis
Site for MathMania magazine, published four times yearly. It was originally published from 19891992, and was revived in 1999. February and April issues from 1999 are available free. The site also offers activity books, games, software, and a book on
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 MathAid  MathAid Associates, Inc.
Interactive mathematics selfstudy, online and offline: Java software with handson tutorials, problemsolving lessons, and customizable tests. Courses offered: Algebra II, College Algebra, Trigonometry, and PreCalculus. Additional topics covered: fractions;
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 Math Apprentice  Colleen King
This rich, multimedia site provides students an opportunity to try various realworld professions that use math. Students can be scientists, engineers, computer animators, video game programmers, and more. Math Apprentice provides areas of free exploration
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 Mathbiz.com  Joseph Cunningham
Free interactive math problems. An "electronic tutor" gives you stepbystep instructions for each problem, which you must answer before proceeding.
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 Math Blaster  Knowledge Adventure, Inc.
Follow links to products and then math to find packages for ages 46, 69, 912, and PreAlgebra.
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 Math Blaster  Knowledge Adventure, Inc.
Hub for the Math Blaster outer spacebased Massively Multiplayer Online (MMO) game. Free math resources include activities, practice, worksheets, and problems.
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 Mathbreakers  Imaginary Number Co.
Instructional video gaming package with lessons and management functions for teachers.
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 Mathcard  David Summer
Written by a former elementary school teacher, Mathcard is a fun and easy to use concentrationstyle Windows game designed to help students learn the answers to simple math equations. Eighteen cards are dealt to the player in three even rows. The object
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 Math Drills (ZDNet)  ZD Inc.
A Windows/NT shareware program to download that quizzes students on the four basic math functions: addition, subtraction, multiplication, division. A timer adjusts the drill to the skill level of each student.
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 Mathematical/Abstract Games in Portuguese  Jorge Nuno Silva
A site devoted to mathematical games: find information about the games and their strategies, exchange them online, compete in contests such as the Campeonato Nacional de Jogos Matemáticos (CNJM), participate in discussion forums, and more. Games
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 Mathematical Biology Pages  Brandeis University
In contemporary biology there are many areas which depend heavily on rather advanced mathematics. This site demonstrates a few of these through Shockwave, Java, and JavaScript explorations. Dixon's Population Pages (exponential growth, nonlinear terms
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