 Kidsmath  About.com
A guided portal to the world of kids' internet math sites. Includes links to math sites categorized by level and topic; math newsletters (which typically highlight a group of sites on one topic, with associated articles); discussion forums; monthly problems
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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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 KidsNook
A search engine for children. Search for words like math, multiplication algebra, etc. to find games, songs, and sites for learning math.
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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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 Kid's Page Archive: Free Printable Math Worksheets  Tracey Smith
Free printable math worksheets for prek through 5th graders.
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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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 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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 KIDS Report Archive (Internet Scout Project)  Computer Sciences Department, University of WisconsinMadison
Kids Identifying and Discovering Sites  reports written by and for kids about cool and helpful Web sites, on various topics (such as Cool Connections, Stretching the Mind, Native Americans, Ancient Civilizations, Election '96, The Planets, etc.). Includes
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 Kids Web: Math Fun, Science Fun  Chicago Systemic Initiative (CSI)
A small collection of fun and educational links to sites for kids. Each link is described briefly.
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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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 Kindergarten Connection  Carol Gossett
A network of educational resources and materials, including teacher tips (both practical and theoretical), lesson plans, and links, from the owner and author of Honey Pot Press. There are three math games in the lesson plan section.
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 Kinds of Constructivism: An Annotated Bibliography  Annie & John Selden; The Math Forum
A bibliography prepared by Annie and John Selden as a supplement to "Constructivism in Mathematics Education  What Does It Mean?"  a talk they gave at the 1996 Joint Mathematics Meetings in Orlando, Florida.
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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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 Kitchen Conversions  Gourmet Sleuth.com
Calculators for and information about common cooking conversions. Includes a calculator with actual weights for over 6500 foodstuffs, as well as one with rough estimates for converting between grams (weight) and teaspoons and other common cooking measures
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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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 K'NEX Education Division  K'NEX Industries, Inc.
Manipulatives consisting of rodandconnector construction toys. K'NEX Education offers Sets of packets (samples downloadable in PDF format) suggesting uses for math and science in the classroom through building models. Classroom K'NEXions provides lesson
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 Knot a Braid of Links (CAMEL)  Canadian Mathematical Electronic Information Services
Mathematics on the Web: a collection of mathematical Links of the Week from 1996 on, with a new one every week. Maintained by CAMEL at Simon Fraser University.
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 Knots on the Web  Peter Suber, Earlham College
A comprehensive list of knot resources on the Web c2004, annotated and organized into three categories: knot tying, knot theory, and knot art. Also Knot books and a Knots Gallery displaying images from the newsgroup rec.crafts.knots.
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 Knowing, doing, and teaching multiplication (Learning and Mathematics)  Magdalene Lampert; Math Forum
In this 1986 article Magdalene Lampert, of the Institute for Research on Teaching at Michigan State University, advocates incorporating students' intuitive knowledge about mathematics into classroom lessons. Like Richard Lesh, she encourages putting new
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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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 Knowledge Online Services  Knowledge Online Services
Online tutoring services for all the subjects in grades K12 and undergraduate college level. Free trial session.
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 Know Your Roman Numerals  George W. Metz
"What a Roman Legionary needs to know in order to count in Ancient Rome": a chart of numbers, with their names in Latin and the corresponding Roman numerals.
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 KrazyDad.com  Jim Bumgardner
Printable puzzles, mazes, games, and more from a selfdescribed "senior nerd" at Disney Interactive Labs: kakuro (aka cross sums, numeric crossword puzzles), krypto kakuro (a combination of kakuro and cryptograms), slitherlink, bridges (aka Hashiwokakero),
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 KRN Software
Free online games for Javaenabled 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 Javaenabled
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 Kumon Math & Reading Centers
Individualized, selfpaced, mastery learning programs for math and reading, offered at the center or by correspondence. The Kumon method emphasizes practical skills rather than theoretical concepts and focuses on selflearning. Students receive daily
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 Kuutigo  Sakari Rosenqvist, Osmo Kotonen, Rosentwist Oy
KuutigoŽ is a Finnish educational and recreational game designed for practising exercises in mathematics and vocabulary. At the same time, it develops logical thinking, motor skills, and concentration and memory. Manufactured completely in Finland, the
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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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 language and literacy: Mathematics  John Bald
The author of The Literacy File and Using Phonics to Teach Reading and Writing, Bald teaches reading, writing, and foreign languages in the UK. His blog posts, which date back to August, 2008, have included "Language, understanding and confidence in maths,"
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 Language and Mathematics (Learning and Mathematics)  Cocking, Chipman; Math Forum
In their 1989 paper, "Conceptual Issues Related to Mathematics Achievement of Language Minority Children," Cocking and Chipman examine the mathematical ability of language minority  particularly bilingual  students, attempting to identify linguistic
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 Large Numbers and Infinity  Math Forum, Ask Dr. Math FAQ
What's the largest number? What's a googol? How do we name large numbers? What is infinity?
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 The Largest Known Primes  Chris Caldwell
An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. Primes are the building blocks of the positive integers: every positive integer is a product of prime numbers in one and only one way, except
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 The Late Professor Morris Kline  Mark Alder
Read Kline's books Why Johnny Can't Add and Why the Professor Can't Teach; his lecture "Pea Soup, Tripe, and Mathematics"; and a bibliography of his publications.
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 Latest posts from Math  Teach For Us
Math teacher blogs from the "network connecting Teach For America (TfA) corps members and alumni who share their stories about ensuring an excellent education for all children." Posts, dating back to July, 2006, have included "what do I need to do to
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 The Latino Connection  Pedro RuízGarcía
A page designed to simplify the search for information on Latino/Hispanic countries. Individual country pages with links to country's history, culture, maps, travel and tourism, arts, cuisine, higher education, and other related Web pages, newsgroups,
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 The Latin School of Chicago Middle School Problem of the Week  Tom Canright
Math and logic puzzles  many original, some reproduced from sources such as NCTM journals  with solutions presented in accompanying videos.
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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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 Launch into Math  C. Halter
A project created to further student understanding about the Internet, its resources, and the NASA Space Shuttle program. SpaceMath activities are provided for geometry (measure area and distance in space photographs); algebra (use the math that keeps
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 Lawrence Hall of Science (LHS)  University of California, Berkeley
A science museum and research center at the Univ. of California, Berkeley, dedicated increasing public understanding and enjoyment of science, and to improving precollege science and mathematics education. Teacher education, exhibits, public programs,
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 LD Online, the interactive guide to learning disabilities for parents, teachers, and children
A vast array of information on topics within the area of learning disabilities, LD InDepth offers articles, research findings, and useful forums, including an area specifically devoted to dyscalculia, or learning disorders in math. See also 10 Tips
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 Leader of the Year Contest  Technology & Education
This program recognizes and honors K12 teachers, technology specialists, and administrators who use technology in innovative ways to motivate students and enrich learning. Submit yourself or a colleague for consideration.
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 Learn by Yourself  Moti Levi
LearnByYourself is a series of downloadable math books that ensure students' success by allowing them to learn without a teacher. Each book is only $3. Each book focuses on one topic, such as Fractions, and provide complete and clear explanations, advancing
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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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 Learner Online  Annenberg Media
The Annenberg/CPB Project leads in helping schools and community organizations use telecommunications technologies to improve learning for all students. Since 1991 the Annenberg/CPB Math and Science Project has funded the development of print and electronic
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 Learn Fractions with Cuisenaire Rods  Molly Silha
Pages that teach fractions using manipulatives: Cuisenaire Rods, a collection of rectangular rods, each of a different color and size, the smallest 1 centimeter long and the longest 10 centimeters long, help students visualize problems, making them easier
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 Learning and Mathematics  Math Forum
Newsgroup discussions among mathematicians, math teachers, and students of educational psychology on the Math Forum's newsgroup geometryprecollege, inspired by recent work on how students learn mathematics. With five related annotated bibliographies.
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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 by Logic: Total Surface Area (SMILE)  Carolyne Boyd, Bennett Elementary School
A lesson designed to teach students to calculate the area of plane surfaces using the formulas for the area of a square, rectangle, and triangle; develop the formula for calculating (and calculate) the total surface area of a cube and a rectangular prism;
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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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