 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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 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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 Limited English Proficiency Students and Mathematics  Kristen Lockwood; Math Forum
An annotated bibliography of resources for mathematics teachers and others interested in how language may affect the thought, achievement and assessment of students of limited English proficiency, as well as these students' access to knowledge and education.
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 The Limits of Mathematics  Ivars Peterson (MathTrek)
In Godel's realm, no matter what the system of axioms or rules is, there will always be some assertion that can be neither proved nor invalidated within the system. Indeed, mathematics is full of conjectures assertions awaiting proof with no assurance
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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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 Links to Information on Number Systems  Suzanne Alejandre
Arabic, Babylonian, Chinese, Egyptian, Greek, Mayan, and Roman number systems, two to ten links in each category.
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 Literature and Mathematics  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I teach mathematics using literature?
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 Literature for Science and Mathematics: Kindergarten Through Grade Twelve  California Department of Education
A collection of over one thousand science and mathematicsrelated picture books, easy readers, classics, and other works of literature for children and adolescents. The recommended titles reflect the quality and the complexity of the types of materials
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 A Little Math about the Golden Mean  Rashomon (K. Wiedman)
The Fibonacci Series and the Golden Mean are intimately connected. The Fibonacci Series is a series of numbers in which each number is the sum of the two previous numbers... The ratio of each term to the previous term in the Fibonacci Series is equal
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 The Little Math Puzzle/Le Petit Problème  Royal West Academy and Canada's SchoolNet
Weekly puzzles posted to Canada's SchoolNet Listserv, intended to be an Internet icebreaker activity for a wide range of classrooms. Inspired by The Great Canadian Trivia Contest, these puzzles are designed for students in grades 5 through 10 and usually
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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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 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 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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 Living Maths HQ  Living Maths
Begun in 1995, this math olympiad has grown from a syllabus for one bright young student into a weekly challenge for thousands of South African learners.
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 Lizard Game (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
The rocky Coast Range of California is the setting for an unusual game played by a brightly colored sideblotched lizard. Each male of the species has one of three throat colors, and each color of lizard has a different mating behavior. The lizards play
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 L'île des mathématiques
Cours de mathématiques, tous niveaux: fiches à télécharger.
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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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 Locating, Using, and Integrating InternetBased Mathematics Materials (NCREL)  Gilbert Valdez; Pathways to School Improvement
Goals, options for action, criticism, and implementation pitfalls; informative video and sound clips; organizations, agencies, and websites that work toward providing schools with better Internet and mathematics materials access. From the North Central
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 Locker Problem  Suzanne Alejandre
A classroom activity (also called 1000 Lockers) aligned to the NCTM and California Standards, to be explored through the use of manipulatives and a ClarisWorks spreadsheet. Students then look for patterns and write the answer algebraically. The problem:
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 Lockhart's Lament  Keith Devlin (Devlin's Angle)
Keith Devlin writes in his March, 2008, column: "This month's column is devoted to an article called A Mathematician's Lament, written by Paul Lockhart in 2002. Paul is a mathematics teacher at Saint Ann's School in Brooklyn, New York. His article has
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 Lockheed Martin/UCF Academy for Mathematics and Science  University of Central Florida
A Master's Degree Program for K8 teachers dedicated to improving mathematics & science education throughout Central Florida. Site has links to a Mission Statement; Academy Description; Program of Study; Faculty and Staff; Advisory Committee Members;
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 lofi paranoid ambient fractal music  Dave Sag
Selfsimilarity is the essence of fractal geometry: this is selfsimilar music, where each part has the same structure as the whole. Download an example in Real Audio, Shockwave, or aiff format. Another version of this page, What do I mean by 'fractal
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 Logical Art and the Art of Logic  Guenter AlbrechtBuehler
About pentominoes, the patterns they create, and what pentominoes have to do with Escher, Penrose, Logic, Impossible Objects, Mathematics, and Art. Download a DOS program, 'newpent.exe', that assembles (6x10) pentomino solutions manually or automatically
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 Logical Art and the Art of Logic  Guenter AlbrechtBuehler
An illustrated essay about pentominoes, flat shapes formed from five (Gr.pente = five) unit squares. Also a DOS program for pentomino solutions (6x10) and galleries of pentomino creations.
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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 Games  Yoogi Games
Logical games, involving math, logic, and problemsolving skills. Free trial downloads, full versions for purchase. For Windows machines.
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 The Logic Puzzle Museum
Play with more than fifty different handson brain twisters, mechanical and logic puzzles  and craft your own. Regular events at this Burlington, Wisconsin, museum include Valentine's Day (makeyourown historic rebus valentines), celebrations of the
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 Logic Reference Tables (S.M.A.R.T.)  Math Share Shop
Reference tables: symbols and how to read them: negation, conjunction, disjunction, conditional, biconditional. By students at Theodore Roosevelt H.S., Bronx, & Edward R. Murrow High School, Brooklyn.
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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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 Logic  ThinkQuest 1996
About logic  knowing how to construct logical arguments and put them into proofs. Logic is the art of showing whether something is true or false. An explanation of basic concepts is followed by an opportunity to test your skills. From SMATT (Science,
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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 Logic Zone
A collection of logic problems with answers, logic puzzles, and cryptograms.
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 The Logo Foundation
A nonprofit educational organization devoted to informing people about Logo and supporting them in their use of Logobased software and learning environments. The site includes links for workshops and seminars; books and videos; Logo software (at discount
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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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 Lois Terms's Home Page  Rebecca S. Lindsay
"Lois lives in a condo with her mixedbreed dog, G.C.F., and a goldfish named L.C.M. She dedicates her time and efforts to the task of making the world of math understandable and exciting to middle grade students..." Lois Terms answers emailed math
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 London Chess Classic  John Foley
This annual conference about scholastic chess and mathematics education features presentations, debates, and workshops. Freely download past meetings' slides from presentations such as "Chess in the Digital Classroom," "Building a Research Agenda for
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 Longer Chains of Reason (Pattern Based Reason)  Alan Selby
About mathematical induction. Rules that say that when a first situation occurs, so should a second, are called implication rules. Implication rules can be linked together, one after another. A ladderbased story illustrates the underlying idea, called
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 Longitude and the Académie Royale  MacTutor Math History Archives
Linked essay describing longitude from Eratosthenes' mapping efforts through the 1681 Académie Royale expedition, with 8 references (books/articles).
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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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 Looking for Gauss... or Waiting for Godot  Mathematical Sciences Education Board (MSEB)
Report on a 1994 symposium, "Mathematics Reform Goes to College," held at the National Academy of Sciences, which addressed three major areas: "Students With a StandardsBased Education," "Mathematics For All Students," and "Preparation of Tomorrow's
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 LookSmart Explore  LookSmart Limited
A Web directory and search engine. Search by keyword or look for sites in more than 24,000 categories (hierarchical menus lead from Reference and Education to Math and Computer Science and onward).
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 Losing Each Mile But Winning the Marathon (Math Chat)  Frank Morgan, MAA Online
Joan was entered to run a special 26.5mile marathon, and she hoped to average under nine minutes per mile over the total distance. She had a number of friends measure her time over various mile segments of the course, and for each possible mile that
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 Love's Dynamics  Ivars Peterson (MathTrek)
For more than 300 years, differential equations have served as powerful models of dynamic phenomena, from planetary motion in the solar system to signal transmission in nerve cells and price fluctuations in a market economy. In the August SIAM Journal
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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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 LSCNet  TERC, Inc.
Best practices, issues, and resources for the National Science Foundation's 72 Local Systemic Change (LSC) Projects across the country. Each of these projects provides teacher professional development and curriculum innovation in the areas of math and/or
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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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 The Lucasian Chair of Mathematics at Cambridge  Robert Bruen; Boston College
Information about the professorship, biographies of current and previous chairs, and bibiliographic references.
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