 Knots (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A mathematical knot is a knotted loop (a knot that can be unknotted is called an unknot). Two knots are considered equivalent if it is possible to rearrange one to the form of the other, without cutting the loop and without allowing it to pass through
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 Knot Theory  ThinkQuest 1997
A short course on knot theory, including tutorials on the basics, knot invariants, knot properties, and knot arithmetic; biographical information on historical and contemporary figures working with knot theory; applications of knot theory; a discussion
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 The Language of Functions and Graphs  Malcolm Swan; School of Education, University of Nottingham, UK
Free PDFs of the teacher's guide and photocopying masters from the book on the teaching and assessment of graph interpretation skills. Activities for developing fluency in using various mathematical representations to describe and analyze the real world
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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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 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 about Algebra tiles: Activities for teachers  David A. Reid
Algebra tiles provide a useful way to introduce operations on polynomials to students of all ages. Reid's paper can be used both as a selfguided tour of teaching with algebra tiles, and as a set of activities for use with students. Examples of instructions
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 Learning About Nutrition Using the TI73 and the Web  Margo Lynn Mankus
A lesson in three parts: a warmup to introduce students to the Food and Drug Administration's (FDA) concepts of recommended daily allowances (RDA), the food pyramid, and nutrition labels; an analysis of the nutrition label for a deepdish pizza, with
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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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 Learning Exchange for Teachers and Students through InterNet (LETSNet)  College of Education, Michigan State University
A collection of interdisciplinary lesson plans  math units, activities and resources including: Earth Day Trash Survey (K12); Fat Counting (16); Destination: Anywhere (46); Fact Checking the News (712); What's for Dinner?; Food Pyramid (16); Bon
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 Learning F. C.  Department for Education and Skills (UK)
Learning F.C. is a Key Stage 2 and 3 curriculum resource pack of literacy, numeracy, and Information and Communication Technology (ICT) exercises on the theme of football. It provides a range of soccerrelated curriculum materials for use in study support
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 Learning Games and Activities for K12  Creative Teaching Associates
Over 200 nonelectronic learning games and activities for ages 4 through adult. Math products include flash cards, activity cards, board games, math chips, cards, books, cassettes for basic math facts drill, and many more. Products are also listed by
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 The Learning Kaleidoscope  Andrew Gael
Blog "exploring the intersection of special education, math education, and disability rights" by a math teacher at a school for students with disabilities in Manhattan. Posts, which date back to December, 2014, have included "Simple Prompts Can Lead to
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 Learning ratios and proportions through scale drawings (SMILE)  Erwin Laskey, Eugene Field School
A lesson designed to teach students that a ratio is a comparison between two numbers; that a proportion is an equivalent relation between two ratios; and that scale drawings are ratios; so that they will be able to make a scale drawing of
the classroom.
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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 Fast  J.K. Mergens
Sample or purchase the five volumes that explain how a homeschooling parent taught her son. The LearnMathFastBooks.com site also offers free worksheets, lessons, homeschooling articles, and other resources.
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 LEARN NC: The North Carolina Teachers' Network  Univ. of North Carolina at Chapel Hill School of Education
A collection of resources designed by experienced North Carolina educators for classroom teaching and learning and for professional development. Resources include: The Beacon, a monthly K12 education journal, and its archives; the complete North Carolina
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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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 Les Mathématiques  Gilles G. Jobin, Projet Diderot
Web resources, activities, lessons and tutorials for secondarylevel mathematics. Illustrated geometry theorems, with extensive use of the software package the Geometer's Sketchpad. Puzzles and games; algebra problems and adult education. Activités:
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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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 Lesson for Multiplying and Dividing Fractions with Post It Notes (SMILE)  Robert Foote, Disney Magnet School
A 7th grade lesson designed to teach students to measure various dimensions of rectangles to the nearest fraction of an inch, dividing fractions to predict the number of Postits needed to meet the length and width of the rectangles. From the Arithmetic
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 Lesson Plan For PartWhole Meaning For Rational Numbers  Michele Gahala
Students use the Geometer's Sketchpad and work as a class to represent parts of a whole using fractional parts of a triangle, and to determine the relation among parts of a whole that are unequalsized pieces.
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 Lesson Plans and Teaching Materials (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to lesson plans that teach some real mathematics as students perform projects, and to auxiliary material.
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 Lesson Plan Search  Google
Free math lesson plans that make use of Google Earth, Google Calendar, Exploring Computational Thinking, and other products and projects of the search engine company: Telling time & Google Calendar; Human Dimensions Project; Median of Latitude Data;
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 Lesson Plans  edHelper.com
A searchable, annotated database of over 5,500 lesson plans from other sites, in a variety of subjects. Math lesson plans include addition, algebra, applied math, calculus, discrete math, probability, statistics, and more.
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 Lesson Plans for the Graphing Calculator  Institute for Technology in Mathematics, William Paterson College, Wayne, NJ
Solutions of Radical equations; Extreme Values and Calculus; Parallel Lines and Properties of Slope; Safe Linking with the TI82; Finding Perfect Numbers; Graphing Celsius and Fahrenheit. By teachers from northern New Jersey.
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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 and Curriculum  MSTE, University of Illinois at UrbanaChampaign (UIUC)
Browse lessons predominantly for middle and high school students, from the Office for Mathematics, Science, and Technology Education (MSTE) and from other sources.
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 Lesson Study in Japan  U.S. Science Education  Education Department, Mills College
Research into Japanese "lesson study," a process in which teachers cooperatively develop and critique new lessons. The site focuses on possible applications and challenges of lesson study to U.S. science and math education. Read related articles and
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 Let 'Em Roll™ Simulation  Matthew Carpenter
The goal of this activity is to demonstrate a real world situation where the probabilities of mutually exclusive and independent events occur. Each student is asked to calculate the experimental and theoretical probabilities of these events. Students
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 Let's Have a Field Day! (ITDC Webquest)  Noelle Kreider, Rialto Unified School District
A lesson plan in which sixth grade students are asked to plan a field day for their class. Some of the integrated skills include using an almanac to assist in decision making, using and interpreting weather sources, and reading and drawing maps, and basic
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 Let's Play Math!  Denise Gaskins
"As a homeschool mom who loves math, I want to help other homeschoolers see the variety and richness of the subject.... I hope this blog will be a place where we can play around with ideas about learning, teaching, and understanding math. (For me, it
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 Let's Take a Trip  G. Carney
Students use the Internet to find the distance from their home city to another city; decide how many miles they could travel in one day; find places of interest to visit along the way to their final destination; and describe in a daily journal the places
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 Lightspan  The Lightspan Partnership Inc.
The education portal and Internet presence of The Lightspan Partnership, whose primary concern is the use of technology in teaching, offering Lightspan PageOne, which allows teachers to use forms and templates to create a class resource page on the Web.
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 Linear Algebra  Jim Hartman, The College of Wooster
A course outline featuring a timeline of developments in linear algebra and notes on change of basis; a QuickTime movie illustrating linear transformation; definitions and "facts" (many of the theorems, lemmas and propositions that one encounters in a
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 Linear Equations (SMILE)  Beatrix U. Ennis, Senn Academy High School
A lesson designed to teach students to emulate the steps in solving linear equations by means of a manipulative; and to transfer the operations performed on the manipulatives to equation form. From the Algebra and Trigonometry section of a collection
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 Linear Regression (MSTE)  Amar Patel; University of Illinois at UrbanaChampaign (UIUC)
A lesson that allows students to explore notions of the relations between two variables using a variety of problems and activities to aid learning and classroom discussion. Requires Excel 5.0 and Netscape (or equivalent). Includes a look at how the lesson
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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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 LiveCube.com  Min Shih
A puzzlebuilding system: small colored cubes may be joined to create larger assemblies. Site includes puzzle models, discussion areas for puzzle designers and educators, and a catalog of puzzle components for purchase. Requires several plugins; files
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 Living Math!  Julie Brennan
A site dedicated to sharing resources for learning, exploring and enjoying math in a dynamic and holistic manner. The homeschooling author has "... found that math history and literature humanizes math, makes it come alive, and provides the context needed
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 Locating IIT Using Ordered Pairs (SMILE)  Diane Yvette Branch, Harold Washington Elementary School
A lesson designed to teach students to plot and locate ordered pairs in a coordinate plane; and to understand how to read and create a map. From the Graphs and Visuals section of a collection of almost 200 single concept lessons by the Science and Mathematics
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 Locating Points Using Cartesian Coordinates (SMILE)  Mercedes Rodriguez, Clemente Community Academy High School
A lesson designed to teach students to give the coordinates of a point; to plot a point given its coordinates; and to use the coordinate system in locating places on the map. From the Graphs and Visuals section of a collection of almost 200 single concept
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 Locating Rational Numbers On the Number Line (SMILE)  William Winebrenner, Dunbar Vocational School
A lesson designed to teach students about rational numbers using the number line; to write rational numbers as the ratio of two integers; to convert each rational number to a mixed number; and to divide any given length into n equal parts. From the Arithmetic
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 Logic and Reasoning (SMILE)  Pearline Scott, Greeley School
A lesson designed to teach students to use logic and reasoning strategies to classify blocks by their attributes; recognize one, two and three attribute differences; use Venn diagrams to form sets and show their intersection; and use the attribute blocks
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 Logic (SMILE)  M. Elaine Granger, Irvin C. Mollison
A lesson for grades 68 designed to use pattern puzzles to teach students to understand word problems by use of reasoning techniques; identify the validity or nonvalidity of the problems; discern which factors are needed for problem resolution; and use
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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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 A Look at LOGO: MicroWorlds Pro  Jordan, Alex, Josh, Rex; ThinkQuest 2003
Sixth grade students Jordan, Alex, Jonah, and Rex draw on MicroWorlds Pro to learn to solve problems, use geometry, and think critically. Their site includes two lesson plans and several activities using MicroWorlds Pro, and some information on real turtles
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 Lower School LEGO Projects  The Blake School, Minneapolis/Hopkins/Wayzata, MN
LEGO Logo projects are integrated into the science and computer curriculum of the Blake School. Students in the second grade study levers, third graders study pulleys, fourth graders study gears, and fifth graders combine their previous studies into a
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 Lure of the Labyrinth  Learning Games to Go (LG2G)
In this free online adventure game, middleschool prealgebra students rescue their pets, combat mysterious monsters, and embark on whimsical math missions to gain a better understanding of proportions, fractions, and ratios, variables and equations,
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