Academic Assistance Center Home Page. The Teachers and staff of AOL's Academic Assistance Center provide link access to their favorite or best information sites for grades K-12. To visit the math room, click here.

ACCESS INDIANA Teaching & Learning Center Teacher. The ACCESS INDIANA Teaching & Learning Center Teacher provides a teacher and a student guide to mathematics to mathematics for grades K-12.

AIMS Education Foundation. The Activities Integrating Mathematics and Science Education Foundation (AIMS) provides online activities and teacher resources for integrating math and science in the K-8 curriculum. Major links include an activity archive, ideas exchange, math history, puzzles, and places to visit.

Algebra Review in Ten Lessons. Algebra Review in Ten Lessons, created by D. P. Story of the University of Akron, is a an online tutorial suitable for high school students taking a second course in algebra. Other D. P. Story's tutorials are WebTrig and e-Calculus for AP students. To view these tutorials, you must download Adobe's free Acrobat Reader.

Algebra Times. Josh Rappaport's Algebra Times, a free electronic newsletter for algebra teachers, offers monthly a lesson plan, math calculation tricks, math riddles, a problem of the month, and questions from readers and their replies. To subscribe to newsletter, click here.

All About Barcodes. Story House Corp. provides a brief history of barcodes, how they work, and related sites for grades 7-12.

Amazing Abacus. The Amazing Abacus Web site teaches students in grades 4-8 the basics of using an abacus.

Allmath.com's Flash Cards. Allmath.com, sponsored by Arbor Media of Ann Arbor, Michigan, provides online interactive flash cards to help elementary school students memorize the basic facts in addition, subtraction, multiplication, and division.

Amazing Mathematical Object Factory (AMOF). Frank Ruskey's AMOF provides information on a variety of discrete topics in math for grades 7-12. Topics include Fibonacci sequences, permutations, magic squares, and pentominoes. Each topic also offers a generator that you can customize to produce examples for that topic.

Amby's Order of Operations Tutorial. Amby Duncan-Carr provides online programmed instruction tutorial with step-by-step assistance in mastering the basic order of operations. The site, suitable for students in grades 6-12, includes practice exercises and self-tests.

Annenberg/CPB Projects Exhibits Collection. The Annenberg Center features a collection of interactive learning projects for grades 6-12. The math projects include Cast Your Vote! which focuses on political polls and their actual meanings providing basic statistical discussions of sampling, probability, and reporting error. The other project, Math in Daily Life answers practical math questions that affect our daily decisions such as "How much will you have saved when you retire?" and "Is it better to lease or buy a car?".

Andrew Crompton's Home Page. Andrew Crompton provides ten pages of the auuthor's geometry creations for grades 7-12. The site offers tessellations (some animated), tiling patterns, and other geometry curiousities. Another creative geometry site is Quincy Kim's.

AP Calculus Online. Andy Paulson's AP Calculus Online provides illustrated material (lessons) to help AP calculus students to prepare for the PSAT and SAT exams.

AP Statistics. The Buckingham Browne & Nichols School (Cambridge, Mass.) provides online a course description, course materials, projects, resource references, and Internet links for an AP Statistics course.

Archimedes. Chris Rorres' Archimedes is a collection of miscellaneous information on his life, his writings, and his mathematics for high school classes.

Are You Ready for Calculus? What You Should Know! The University of New Brunswick's Department of Mathematics and Statistics provides a collection of algebra, geometry, and trigonmetry exercises accompanied answers useful for high school students preparing for SAT exams.

ArithmAttack. The Argonne National Laboratory's ArithmAttack provides as many as computer-generated arithmetic problems you can answer in 60 seconds. This interactive tool provides online drill in addition, multiplication, division, and subtraction for elementary school students.

Ask Adam Online Math Tutors. Ask Adam Online Math Tutors, founded by Adam Moore, provides a free and comprehensive service to K-12 math students around the world. Adam and his volunteer tutors are ready to answer your questions. Enter through the student door to ask a question, search the archives, or view the question of the week.

AWSM Online. AWSM Online from the Addison Wesley/Scott Foresman Education Network provides a wide variety of chapter-by-chapter projects for foundations, algebra, geometry, and advanced algebra course at the high school level. Even though these projects are specially designed for the Addison Wesley/Scott Foresman math textbooks, they can be used with other high school math courses.

Aunt Annie's Crafts: Boxes and Bags. Aunt Annie's Crafts provides a variety of art projects for making your own boxes and bags in different shapes, sizes, and designs. To view these hand-on projects useful for geometry instruction in grades 7-12, click here.

Babbage Pages Anthony Hyman's Babbage Pages provide an introduction to Babbage`s life and work, and current research on Babbage. Babbage is most commonly known as the "father of the computer". The site suitable for grades 8-12.

Ball Drop. Ball Drop is an online animation demonstrating the normal distribution curve. The site is suitable for grades 7-12.

Bamdad's Math Comics Page. Bamdad's Math Comics Page, frequently updated with new comics, features a collection of over 200 cartoons scanned from newspapers and magazines for grades 5-12. These cartoons usually involve humorous math-related situations.

Basic Math Practice. Leland R. Beaumont's Basic Math Practice provides online drill exercises in addition, subtraction, or multiplication for elementary school students.

BasketMath Interactive. Science Academy Software's BasketMath Interactive provides a wide variety of animated math tests helping students in grades 4-10 to practice online their math skills. Tests include whole number computations, rounding numbers, finding the common factor, word problems, decimal computations, exponents, and many others. Answering the question correctly results in a basketball shot animation, while incorrect responses yield the correct answer. To find out your score on a test, scroll to the bottom of the window and click on Results.

BBC Education: GCSE Math Bitesize. BBC provides a variety of interactive math tutorials along with tests for students in grades 6-12.

BEAM: Downloads. BE A Mathematician (BEAM) from their publications provides a variety of classroom worksheets and accompanying activities with instructions for using them grades 1-5. To view and print these downloads, you must have Adobe's free Acrobat Reader.

BEATCALC. Beat the Calculator (BEATCALC), maintained by B. Lee Clay, provides online a math trick every Monday morning that will impress students in grades 5-12. The trick (a calculation shortcut) enables students to do math computations mentally faster than a calculator. Each trick has a clear explanation and an example. Teachers can subscribe to this weekly service via email. The site includes easy-to-follow subscription instructions.

BEATCALC Archive. Beat the Calculator (BEATCALC) Archive from B. Lee Clay's mailing list contains a wide variety of over 150 calculation shortcuts for students in grades 5-12. Each shortcut includes a clear explanation and a sample problem. The site also provides calculation practice problems to accompany these shortcuts.

Berrie's Statistics Page. Berrie's Statistics Page provides a variety of QuickTime movies to illustrate statistical concepts for students grades 9-12. Some of the topics covered are an interactive graph of the central limit theorem, mean and variance in the normal distribution, a graph of the normal distribution, and mean and variance in the normal dstribution.

Bill Simpson's Magic Squares. Bill Simpson teaches you about magic squares from making them to understanding them. Other similar magic square sites are Kwon Young Shin's and Mutsumi Suzuki's .

Biographies of Women Mathematicians. Biographies of Women Mathematicians is part of an on-going project by students in mathematics classes at Agnes Scott College in Atlanta, Georgia. The project illustrates the numerous achievements of women in the field of mathematics. Elisabeth Freeman & Susanne Hupfer's Past Notable Women of Computing & Mathematics also recognizes the contributions of women in the fields of mathematics and computing. These sites, suitable for grades 6-12, include links to related math history resources.

Binary Home Page. Andrew's Binary Home Page explains the binary numeration system and its connection to the modern day computer. John Rieman's description is also useful in understanding binary arithmetic. These sites are suitable for grades 7-12.

Binary, Primes, and Factors. Ulrich Sondermann's Binary, Primes, and Factors is an introduction to number theory for grades 7-12. Another similar number theory site is Ben's Number page. Do you know what is special about this number?.

Blit Math Master. Blit Math Master, created by Ohio Distinctive Software provides an online interactive math skills game for students in grades 2-9. The game offers seven levels of play from simple addition all the way to linear equations. You choose the level that you want to play, and you're awarded a star for each right answer you give.

Blue Dog Can Count. Blue Dog Can Count is fun way for preschool and elementary school children to practice basic their computational and counting skills. Blue Dog is a friendly, math-savvy canine waiting for you and your friends on the World Wide Web. Fill in any basic math equation, and Blue will bark the result through your computer's speaker. Blue will give a "howling" yelp when the answer is a zero or a negative number.

BOBCAT. The Best Of the Best Computer-Aided Teaching (BOBCAT) contains a well-organized collection of educational sites and tutorials grouped by grade level and subject area for grades K-12.

Bureau of Engraving and Printing: the Currency. The Bureau of Engraving and Printing (BEP) provides information and images of U.S. paper money for grades 6-12. To learn about the new U.S. coins, click on The Mint's Circulating Coins site.

Calculating Machines. Erez Kaplan's Calculating Machines is a collection of Web pages about mechanical calculating machines suitable for grades 7-12. The pages contain pictures and provide historical reviews of machines dating back to 1623. The site also includes a comprehensive list of related computer resources.

Calculus and Differential Equations Mathematica Project. Gary S. Stoudt of the Mathematics Department at Indiana University of Pennsylvania provides a variety of interactive calculus and differential equation exercises from Mathematica's notebooks for AP high school students.

Calculus Carnival. Calculus Carnival uses high-technology to visually show AP high school students basic calculus concepts. For a complete list of QuickTime movies, click here.

Calculus@UTK: Math 141. The University of Tennessee at Knoxville provides online a calculus primer for AP students and teachers. For additional calculus material, click here.

Calculus Modules Online. PWS' Calculus Modules Online contain of a variety of math topics with exercises to help high school students learn calculus. Each topic includes basic exercises in the "Learn" section, stretch your understanding exercises, and applications in the "Case Studies" section. For a list of topics, click here.

Calculus.Org: The Calculus Page. The UC Davis Department of Mathematics provides online study materials that can help AP calculus students prepare for the SAT exam. The site includes a list of problems and solutuions for differential calculus and sample exams covering limits, derivatives, differentials, and graphing. Another similar site with practice quizzes is Carleton University's.

California Math Show. The California Math Show, a travelling, portable, interactive math exhibit based on the idea of symmetry, provides online geometry activities for grades 2-8. To find these activities, scroll to "The California Math Show on the World Wide Web".

Cardboard Cognition. Cardboard Cognition provides a collection of over 200 board and card games covering a wide range of subject areas designed by teachers for use in grades K-12. Scroll to "Mathematics" in the Content and Age Group Chart to find math games. Teachers can modify or replicate these learning games for use in their own classrooms.

Carol Hurst's Math and Children's Literature. Carol Hurst's Math and Children's Literature offers a variety of ways of integrating children's literature with math. The author provides math activities from articles she wrote for the Teaching K-8 Magazine as well as from sample chapters and books. In addition, the author lists books by grade level and theme recommended for integrating math in literature. The site is suitable for grades K-8.

21st Century Problem Solving. Howard McAllister's 21st Century Problem Solving features the author's instructional approach to problem solving that applies across the curriculum and at all grade levels. The site provides numerous examples of problems solved using the author's problem solving methods, a discussion of the principles of reliable problem solving, and an evolving encyclopedia of solved problems in pre-college algebra, physics, and chemistry. For a list of all the solved problems, click on the Journal.

Chaos Hypertextbook. Glenn Elert's Chaos Hypertextbook is an online illustrated primer on fractals and choas for AP high school classes. Another online hypertexbook by the author is Ptolemy's Table of Chords.

Chinese International School's IB Higher Level Mathematics Syllabus. The Chinese International School in Hong Kong provides online a higher level mathematics syllabus for high school classes. Included in the syllabus are over 100 links to such topics as algebra, trigonometry, probability, statistics, calculus, matrices, vectors, and groups. The site also offers an additional 200 math links as well as links to calculator resources including Texas Instruments, Casio, and others.

CIMT: Index to Games Pages. The University of Exeter's Centre for Innovation in Mathematics Teaching (CIMT) explains the rules for a collection of two-player games that can be used in the middle and high school math classroom. Included are taking-out games requiring only a pile of markers (counters) such as buttons or coins and paper-and-pencil games referred to as putting-in games. The site also provides the rationale and ways of using these games in the classroom.

CIMT: Resources. The University of Exeter's Centre for Innovation in Mathematics Teaching (CIMT) provides activity worksheets on a wide variety of topics to broaden the middle and high school math curriculum. To find this material, scroll to "Worksheets currently available are". CIMT also includes another page of math resources with many more classroom activities accompanied by teacher's notes. To view and print any of these worksheets, you must donload Adobe's free Acrobat Reader.

Clark Kimberling. Clark Kimberling's home page contains a collection of illustrated articles on triangle geometry as well as other historical and number theory topics grades 9-12. The geometry topic includes a list of 20th-century and classical triangle centers.

Classic Fallacies. The University of Toronto Mathematics Network's Classic Fallacies provides a collection of false proofs: arguments that seem convincing, but end up proving ridiculous things like 1=2! Try to follow the step-by-step "proofs" and spot their flaws. The computer will tell you if you're right or not, and will give you more information about why that step is or isn't legitimate. For other similar sites, go to the Math Forum's the Ask Dr. Math False Proofs, Classic Fallacies or the Math Archive's When does 1 = 2?.

Classroom Compass. Classroom Compass, published three times a year by Southwest Educational Development Laboratory, provides a collection of activities for integrating mathematics and science instruction in grades 3-8.

Classroom Connect: G.R.A.D.E.S. Classroom Connect's G.R.A.D.E.S. features hundreds of annotated educational sites for grades K-12. Math teachers can find sites for a variety of topics including curriculum and instruction.

Clever Games for Clever People. Clever Games for Clever People, adapted from John Conway's book On Numbers and Games features a collection of 16 logic and strategy games for grades 7-12. All the games include playing rules, simple materials required, and illustrated instructions for making them.

Clock (Modular) Arithmetic Pages. Susan Addington provides interactive modular arithmetic materials the author has prepared for grades 2-8. Students can learn about arithmetic on a circle instead of a number line and can play a number pattern game, number bracelets, based on clock arithmetic. Another online activity by the author is where students tell time with their feet by measuring their shadows.

CNBC Student Stock Tournament. CNBC gives student investment clubs or student teams from grades 4-12 across the U.S. and Canada an opportunity to go head-to-head in a test of stock-picking skills while learning the ways of Wall Street and improving their financial literacy. Your portfolio begins with $10,000 in play money, and you may trade in any common or preferred stocks valued at $5.00 or more that is listed on the New York, American or NASDAQ exchange. You are not charged for any commissions on purchases or sales, and you can own up to 20 different stocks.

Colorful Mathematics. Colorful Mathematics contains software games for exploring graph theory in grades 6-12. To download the free IBM compatible games, click here. The site provides also a teacher's corner with background information and instuctional ideas for each activity.

College Math Prep for High School Students. College Math Prep for High School Students provides study problems, a sample quiz, and other resources for those whose math needs a bit of a brush-up.

Comparative Technology Workbook Approach. Gary A. Harris of Texas Tech University provides a series of graphing and algebra exercises using the TI-85 calculator and the Maple software for high school classes. This material can supplement traditional teaching in algebra classrooms.

Computer Art by Hans Kuiper. Hans Kuiper provides a collection of computer art made by his Mirror Artist program for grades 7-12. The site includes tessellation pictures and other computer math-related art created by Hans Kuiper.

Connected Geometry. The Education Development Center's Connected Geometry is a NSF-sponsored project providing interactive, hands-on geometry activities for high school students. To find these activities, click a chapter in the "Book Descriptions" section. The site also includes Sketchpad sketches available for download, as well as interactive Java animations that students can manipulate to make the concepts more understandable.

Connected Mathematics Project (CMP). Michigan State University's Connected Mathematics Project (CMP) provides instructional materials for teaching middle school mathematics. Topics covered are number, geometry and measurement, probability, statistics, and algebra. To find the units, click here.

CNNfn's Investment Challenge. CNN sponsors an investment challenge called Play The Market that combines simulated stock trading with financial mini games. Upon registration (you can join at any time), your account is credited with $100,000. For a quick primer, start with the Final Bell tutorial. It covers how to play the game, as well as how to identify and research stocks online. The grand prize is a start-of-the-art laptop computer, but smaller prizes are awarded daily to the player with the largest percentage gain at the close of each market day. The site is suitable for high school students.

CNET Downloads. The Computer Network (CNET) provides a collection of math freeware and shareware downloads for the MAC as well as for the PC. K-12 teachers will also find other math software in the education section for "Kids".

CRC Concise Encyclopedia of Mathematics. The CRC Concise Encyclopedia of Mathematics is an extensive searchable online encyclopedia of math equations, formulas, facts, figures, terms, derivations, and recreations compiled by Eric W. Weisstein. The site is suitable for grades 8-12.

CSUN's ELM Resources. CSUN's Entry Level Mathematics (ELM) Resources provide practice tests with accompanying study material for basic algebra, intermediate algebra, and measurement geometry. College-bound students in grades 8-12 can use this site from California State University at Northridge to see if their math skills are up to par with the requirements of introductory college math.

CTW's Sesame Street. The Children's Television Workshop (CTW) provides a variety of online preschool math activities related to their popular Seame Street television program. The site includes a collection of printable number coloring and shape coloring pages of their favorite Sesame Street characters as well as fun connect the dots, fit the shapes, and hidden numbers interactive activities.

Cubic Science. Cubic Science provides online a step-by-step animated proof of the Pythagorean theorem and an interactive inequalites tutorial with rules and exercises for high school math students. To view these activities, you must download Macromedia's free Shockwave plug-in.

Curious and Useful Math. Clay Ford's Curious and Useful Math Web site features a variety of tricks and rules for quickly figuring math computations. Included are mutiplication and division tricks, age math, scroll down slowly, squaring tricks, and square roots by hand. The site is suitable for grades 5-12.

Currency Comparison Page. The Currency Comparison Page provides an interactive project for grades 5-12 from WimmeraNet in Australia. The site asks students to compare what their currencies will buy with five Australian dollars. Students can also view other entries at the comparison list.

Cyber Jacques. Cyber Jacques offers a variety of online games including a tangram game, and a connect the dots activity, and a sliding tile puzzle for kids in grades preK-2.

Darts Plus. Darts Plus, created by Knowledge Adventue for grades 2-6, is an online version of a real darts game. Students use a small number of darts to match the score shown in the target box.

Data Powers of Ten. Roy W. Clickery's Data Powers of Ten provides concrete examples illustrating various data media according to how much data they can hold, from 0.1 byte to a billion billion bytes. The collection includes estimates for bytes, kilobyte, megabyte, gigabyte, terabyte, and others. This site, suitable for high school classes, makes hard disk storage capacity and RAM values meaningful.

Data and Story Library. Carnegie Mellon University's Data and Story Library (DASL), pronounced "dazzle", is an online library of datafiles and stories that illustrate the use of basic statistics methods. The site includes 29 topics ranging from archeology to zoologogy for grades 8-12.

Dave's Math Tables. Dave's Math Tables, available in English and Spanish version for grades 5-12, provides a vast array of math topics from a basic multiplication table to something as mind-boggling as a "fourier series". The site includes topics ranging from general math to calculus as well as an English-Spanish Math Dictionary.

Dear Parents. Dear Parents, courtesy of Edmark Corporation for grades preK-6, offers advice on a wide variety of school-related subjects. The Math section includes topics ranging from homework to content. The site also provides Donna Stanger's answers to your selected questions.

Deep Zome. Deep Zome explores the the Fibonacci sequence as well the Golden Section and the Golden Rectangle geometric topics for high school math classes.

Dictionary of Units. The Centre for Innovation in Mathematics Teaching at the University of Exeter provides a comprehensive dictionary of units with easy conversions from almost any unit of measure to any other unit of measure found in use around the world today. A unit may be found either by looking under the category such as length, mass, or density, or by choosing a unit from an alphabetical list of units. The site is suitable for grades 7-12.

Dynamical Systems and Technology Project. Boston University's Dynamical Systems and Technology Project, developed by Robert L. Devaney, contains Interactive Papers with activities introducing secondary school teachers to contemporary topics such as fractals and choas. The site also offers a fractal quiz.

e-Calculus Home Page. The University of Akron provides a variety of online tutorials including algebra review, trigonmetry lessons, assorted calculus topics for AP math students. To view the material, you must download Adobe's free Acrobat Reader.

Educational Java Programs. Jacobo Bulaevsky's Java site provides two interactive applets for enhancing geometric concepts in grades 7-12. The Pattern Blocks and the Fractals Programs both includes a descriptions and user's instructions.

Edutest. Edutest offers a free online service providing a large collection of math tests and assessments with instant feedback for the elementary and middle school grades. Click here to take a test.

Education 4 Kids. Infobahn Xpress provides interactive math games for students in grades 2-8. Students can practice online their skills in computation, telling time, and making change/spending money. The games are Math Tables, Math Square, Time Experince, and Money. (The link to their popular "Flashcards for Kids" site is listed below).

Educ-Station: Teacher Tested Sites and Ideas. Disney's Educ-Station provides a collection of sites and ideas featuring math activities for grades 4-8.

EduStock. EduStock features a market simulation game and a tutorial on how to pick good stocks. It also profiles a select group of well-known companies like Coca Cola, McDonalds, Nike and others to help you start your research effort. The site is suitable for students in grades 7-12.

Ed Tech Tools. Ed Tech Tools provides a service for creating interactive quizzes on the Web. No knowledge of HTML is necessary. For more information about this free online service, click here and to apply for a QuizCenter account, click here. The site also includes a list of sample quizzes created by their QuizMaker 2.0 for various topics.

Egyptian Sites. Terri Santi provides a variety of math sites that can help middle school students learn about the ancient Egyptian numeration system. Vern Beaumont's Egyptian page also offers an introduction to Egyptian mathematics. To learn more about other ancient number systems, click on Suzanne Alejandre's page.

E-Lab. E-Lab provides a variety of online interactive activities, visualizations, and student worksheets from Harcourt Brace's CD-ROM for grades 3-8. To print any student worksheet, you must download Adobe's free Acrobat Reader.

ENC Frameworks: Mathematics Toolkit. The Eisenhowser National Clearinghouse (ENC) provides online a K-12 model curriculum framework with sample activities as well as problem solving activitiesfor grades K-12.

Ethnomathematics on the Web. Ohio State's Ethnomathematics on the Web features an extensive collection of sites related to multicultural mathematics education for grades 7-12.

Euclid, Fibonacci, and Sketchpad. Euclid, Fibonacci, and Sketchpad is an article from the Mathematics Teacher Online recounting two students' solution using the Geometer's Sketchpad software to an age-old geometry problem of dividing any line segment into a regular partition of any number of parts. To view an animation of their proof, click here and for related sites about geometry problem, click on Jim Wilson's Commentary, William I. Johnston's The GLaD Construction and Its Precursors, or Domingo Gomez Morin's Scalene and Isosceles Partitions (SIP). These sites are suitable for AP math students.

Euclid's Elements. Euclid's Elements is David Joyce's complete online English version of the13 Books ofEuclid's Elements based on Heath's translation. All of the figures are illustrated using the Geometry Applet which allows you to manipulate the figures by dragging points. If your browser is not Java-capable, then the illustrations in the elements will appear as plain images. The site, suitable for high school geometry classes, includes a table of contents.

Exact Change, Please. The Tennessee Department of Financial Institutions provides an exact change finance game for grades 3-8 that requires students to click on the correct combination of bills and coins to match the given amount. The easy game keeps a running total, while the hard game requires the player to keep track of the amount entered.

Experiments. Neal Carothers' Experiments Page contains historical topics in math on infinite sets, the Cantor Set, the Babylonian method for computing square roots, "A Common Book of Pi". The site is suitable for advanced high school students.

Exercises in Math Readiness for University Study (EMR). The University of Saskatchewan's provides a collection of online tutorial exercises (EMR) for algebra I and II, geometry, trigonmetry, and other topics for students in grades 8-12. This resource can serve as as a storehouse of extra exercises for math teachers, as enrichment for gifted middle school students, as a review for 11 or 12 grade math students who are about to take the SAT.

FamilyEducation Network. The FamilyEducation Network, sponsored by Scott Foresman/Addison Wesley, provides a wide variety of curricular resources of interest to K-12 teachers and students. To find mathematics activities and online quizzes, click on an age group, and for an overview of the site, click here.

Family Math Home Page. Family Math, published by the Lawrence Hall of Science at the University of California, Berkeley for grades K-6, provides a variety of sample hands-on activities from Issue 1, Issue 2 , and Issue 3.

Famous Curves Index. The MacTutor History of Mathematics archive provides Java applets for you to experiment with a whole collection of over 70 famous curves such as the Spiral of Archimedes, Witch of Agnesi and the Quadratix of Hippias. The site is suitable for high school classes.

Fantastic Fractals. Fantastic Fractals is an online guide where you can learn all about the different types of fractals. The site, suitable for grades 6-12, includes tutorials, a fractal gallery, and a reference section.

Fantastic Math Tips. Marmalade Man provides a variety of computational tricks and tips for grades 5-12. Other similar sites are Mrs. Mitchell's math games, Kenneth Fletcher's math tricks for all ages, Emil Vázquez's math tricks of the trade, Peter Schulz's number tricks, and Card Trick Central's mathematical card tricks.

Fast Arithmetic Tips. Alexander Bogomolny provides a collection of fast arithmetic tips for grades 7-12. Topics includes mutiplication and division shortcuts, squaring numbers, divisibility tricks, and math magic to amaze your friends.

Fast Marching Methods and Level Set Methods. J.A. Sethian's Fast Level Set Methods introduces AP math students to numerical geometry techniques used for analyzing and computing interface motion in a host of settings. The site contains graphics, animations, and Java applets which show level set approaches for following the evolution of various interfaces from soap bubbles to a beating heart, and includes an explanation of 'Why we still can't predict what happens when milk is poured into a cup of swirling tea'.

Favorite Mathematical Constants. The Favorite Mathematical Constants, maintained by MathSoft's Steven Finch, is a searchable collection of famous numbers that includes history, computation algorithms, and late-breaking news from the world of mathematics. To find a list of Steven's favorite numbers, scroll to "Well-known constants" or click on his Table of Constants where the number values (constants) are arranged in ascending order and each value has a brief description and a link.

FHS Precalculus Study Page. The FHS Precalculus Study Page is an online study guide with 15 pre-calculus topics done chapter by chapter for high school students. Topics covered are exponents and logarithms, linear and quadratic equations, inequalities, functions, polynomial functions, and analytic geometry. The site contains examples and sample tests with answers as well as interactive quizzes.

Fibonacci Numbers and the Golden Section. Fibonacci Numbers and the Golden Section, created by Dr. Ron Knott of Surrey University in Guildford, UK, contains information about the Fibonacci series: 0, 1, 1, 2, 3, 5, 8, 13,... and also its related mathematical objects: the golden section +/- 0.61803 39887... or +/- 1.61803 39887... and the golden string 1 0 1 1 0 1 0 1 1 0 1 1 0 ... for grades 9-12. It is recommended that your start your explorations at Fibonacci Numbers and Nature to learn about Fibonacci numbers and how they relate to rabbits, bees, shell spirals, branching plants, and more.

Find Mathematics Sites on the Internet. The Math Forum Internet Resource Collection Searcher provides a powerful way of finding math information on the Internet. It offers a well-developed collection of Web resources for K-12 teachers. Math sites are searchable by keyword, type of resource, topic, grade level, and other options.

Finite Mathematics Applied Calculus Resource Page. Hostra University's comprehensive Web resource for Finite Mathematics & Applied Calculus includes tutorials, complete texts online, quizzes, exercises, and free software. The site is suitable for AP math classes.

Flashcards. A+ Math provides a collection of interactive flashcards to help students in grades 2-7 improve their math skills. Topics include +, -, x, and ÷ basic facts, area, geometric shapes, rounding, inequalities, simple algebraic equations, +, -, x, and ÷ negative numbers, and money denominations. The site also offers +, -, x, and ÷ advanced problem flashcards.

Flashcards for Kids. Infobahn Xpress provides a collection of interactive math flashcards for students in grades K-8 to practice their basic math computations. A simple graphical interface allows students to choose from addition, subtraction, division, multiplication and other skills and then perform online calculations. Students can choose the skill as well as adjust the difficulty and range of numbers used. The site even keeps score and also informs students when they're answers are incorrect.

Formula QuickGuide. Formula QuickGuide provides a list of formulas with examples on the mathematics section of the GED tests. The site is a useful reference, whether you're preparing for a math exam, helping a family member, or just looking for a quick brush up.

Fractal Explorer. Fabio Cesari's Fractal Explorer provides an introduction to fractals for grades 8-12, including fractal images, how Mandelbrot and Julia sets are generated, and related sites. Another fractal site with over 120 pictures is Big Al's.

Fract-ED. Douglas Martin's Fract-ED is an introductory fractal tutorial aimed at the honors math high school student. The site includes a pocket calculator activity performing an iteration experiment.

Fractionator. Fractionator, created by Pierian Spring Software for grades 4-8, is an interactive fraction game where students slide online a numerator bar and a denominator bar to make a given fraction. This enables students to see a picture of the fraction they make.

Fractory. Fractory is an interactive tool for creating and exploring fractals in grades 7-12. The site includes links to to related resouces. Chaos & Fractals is another good place where you can learn about fractals.

Frequently Asked Questions About Trigonometry. J. David Eisenberg provides an interactive tutorial for learning about trigonometry in grades 7-12. Students can discover how the sides and angles of a triangle are related to each other. As long as the students know the basics of triangles and measuring angles (that a right angle = 90o and terminology such as base, height, and hypotenuse), they'll be able to understand and enjoy this interesting instructional presentation.

Frequently Asked Questions in Mathematics. Frequently Asked Questions in Mathematics is an extensive reference source to answer many of your math questions. Alex Lopez-Ortiz has compiled of a collection of questions and their answers about mathematics from the Sci.Math FAQ Newsgroup. Topics range from trivia and the trivial to advanced subjects such as Wiles recent proof of Fermat's Last Theorem. The site is suitable for grades 9-12.

FunBrain: Where Kids Get Power. FunBrain provides a wide variety of interactive math games for students in grades 3-7 to practice their math skills. The Math Baseball game has students answer math problems to score runs; the Power Football has students also answer math problems to score points; Change Maker, a cash register game, has students try to get as much money in their piggy banks as possible; the Fresh Baked Fractions game has students find the fraction not equal to the other fractions; the Line Jumper game has students jump on the right number; and in the last game, Shape Surveyor, students train to be an archeologist. Each learning game offers different levels of difficulty.

Fundamentals of Mathematics. Fundamentals of Mathematics, Dr. Ephraim Fithian's online course for elementary school teachers, covers a variety of math topics including problem solving, logic, and number systems. The site also includes chapter tests.

Furman University Mathematical Quotation Server. Furman University provides a collection of hundreds of quotes by famous mathematicians. The site, suitable for grades 8-12, contains an index, a keyword search tool, as well as a random quotation generator.

Games. A+ Math provides a variety of online bingo, hidden picture, and concentration games for elementary school students to practice online their basic math skills.

Gareth Pitchford's Primary Resources. Gareth Pitchford's site is showcase for the author's visually appealing cartoons. The site contains a math resources section with useful ideas, games, and worksheets for grades K-5. You'll also find more math activities and teaching tips categorized by age level in his Advice to Parents section.

GeoHome. GeoHome, in English as well as Spanish, provides a wide variety of self-correcting questions and exercises for students studying or reviewing geometry.

Geomaths MathHelp Notebooks. The Universty College London in the UK provides students with two online mathematics self-study notebooks. Topics covered are equations and functions, common areas and volumes, coordinates and graphs, linear & simultaneous equations, and quadratic equations. The material includes specific explanations, illustrations, examples, practice quizzes, and a math glossary. This "refesher" material is intended for geology students, but it is also useful for high students in regular and AP math classes.

Geometry. Geometry, available in English and Spanish versions, features a collection of self-correcting questions on a variety of geometry topics for high school students. Another similar informal guide is an Introduction to Geometry.

Geometry and Spatial Sense: Tesselations. Geometry and Spatial Sense provides online animations for constructing a variety of tesselations. (A tesselation is the repetition of a pattern that covers an entire area with the repeated design fitting together with itself.) To view an animation, scroll to "Additional Tesselations" and click on one. The site is suitable for grades 5-12.

Geometry and the Imagination in Minneapolis. Geometry and the Imagination in Minneapolis is a collection of over 30 handouts for high school math students. Topics include knots diagrams and maps, geometry on the sphere, Descartes'formula, topology, and Gaussian curvature.

Geometry Center. The Geometry Center, a mathematics research and education center at the University of Minnesota, features a gallery of geometry explorations in Interactive Web Applications, and a variety of geometry projects, for high school math students in the Educational Materials section.

Geometry for Elementary Education Majors. Geometry for Elementary Education Majors contains a collection of geometry sites with useful classroom activities for grades 6-12.

Geometry Formulas and Facts. Silvio Levy's Geometry Formulas and Facts are excerpts from the 30th edition of the CRC Standard Math Tables and Formulas. The site, suitable for high school classes, covers the area of geometry in two and three dimensions.

Geometry Forum: Constructioning Geometry On The Internet-Sum 95. The Geometry Forum provides a variety of interactive projects and classroom activities compiled by 1995 Swarthmore College's Summer Institute teacher-participants for grades K-12. To view all the site's contents by topic or by grade level, click here.

Geometry Independent Projects. Ruth Carver's high school students from Germantown Academy present online their independent projects. Topics include multicultural math games, fractals, history of ancient number systems, gambling odds, origami, the Phi page, and the making of violins and violas (math and music).

Geometry in Motion. Geometry in Motion, created by Daniel Scher, provides a variety of animated, interactive curve-drawing devices for enriching the teaching of high school geometry.

Geometry Junkyard. David Eppstein's Geometry Junkyard contains a wide variety of attractively illustrated geometry topics for grades 9-12. Topics include circles and spheres, coloring, covering and packing, dissection, geometric models, knot theory as well as the author's contributions. To view the all the topics, click here.

Geometry of the Sphere. John C. Polking's Geometry of the Sphere contains is an online tutorial for AP math students to learn about spherical geometry. Some of topics covered are lunes, area on the sphere, spherical triangles, Girard's theorem, similarity, and Euler's formula. The material includes basic information, illustrated explanations, exercises, and instructions for making a "spherical straightedge".

Global Grocery List Project (GGL). The GGL Project in its eleventh year, sponored by the Global SchoolNet Foundation for grades K-8, is a collaborative project where kids go on a "global grocery shopping spree" comparing and sharing prices over the Internet.

Glossary of Mathematical Mistakes. Paul Cox's Glossary of Mathematical Mistakes contains examples of mathematical mistakes made by advertisers, the media, reporters, politicians, activists, and in general many non-math people. It provides material to sharpen your students' critical thinking and math skills covering a range of logic and mathematical errors and inconsistencies. The site is suitable for grades 7-12.

Golden Mean. The Golden Mean Web site discusses how this ratio (approximately equal to 1.618) has influenced mankind since the Greeks and the Egyptians. To learn more about this number, click on Some Golden Geometry, click on Steven Finch's Golden Mean, or Timothy Reluga's Golden Section.

Gordon's Games. Gordon Games, based on a primary teacher's 25 years of experience, is a collection of over 25 simple and inexpensive arithmetic games covering a wide range of skills for grades K-3. The site also offers the author's other materials and games for teaching a variety of other math topics in grades 4-7. Included are whole number computational skills, fractions and decimals, factors and multiples, prime and composite numbers, and casting out nines.

Graphics for the Calculus Classroom. Graphics for the Calculus Classroom, created by Douglas N. Arnold, features a collection of graphical demonstrations (Java animations and slides or animated GIFS) of concepts for teaching first-year calculus students.

Graphs and Stories. Graphs and Stories presents five activities for teaching about graphs in grades 4-8.

Graph Theory. Laurie Woo's Graph Theory online resource features activities, problems, and applications for the following discrete math topics: Euler Circuits, Hamilton Circuits, coloring graphs, and Steiner Trees. The site also includes background information, tutorials, and definitions on graph theory for high school classes. For additional information on the Four Color Theorem, click on Robin Thomas' site.

GCSE Answers' Mathematics Department Main Menu. The GCSE Math Department, designed as review information for Great Britain's standardized exams, provides a collection of online tutorials as well as math problems for grades 9-12. The site offers negative numbers, probability, trigonometry 1 (right-angled triangles), and trigonometry 2 (sine and cosine rules) tutorials, and step-by-step problems in ratios and fractions, introductory algebra, measurement geometry, probability, trigonmetry, and other advanced math topics. Answer keys are also supplied. Teachers can easily use this material in their math classes, and students can use it for preparing for the SAT I or ACT tests.

Grid Game. The Grid Game, from BBC's Megamaths Web site, is interactive math game offering different levels of play and playing times for grades 3-6. Students try to beat the clock solving addition, subtraction, multiplication, and division problems. To play this game, you must download Macromedia's free Shockwave plug-in.

Hamilton's Math to Build On. Math to Build On Web site contains excerpts from the book Math to Build On, by Johnny and Margaret Hamilton. The site, a wonderful homework helper for students in grades 7-12, provides practical math tips and shortcuts for a variety of topics as well as a non-technical math glossary.

Harcourt Brace's Animated Math Glossary. Harcourt Brace's Animated Math Glossary contains illustrated and animated definitions and explanations for math terms, categorized by grade level for grades K-8. Starting at grade 3, you can also find tables of metric and customary measurements, time, formulas, and symbols by clicking on other at the end of each alphabet.

Help With Calculus For Idiots (L i k e M e). Eric Gumtow of the University of Texas at Austin provides help with calculus for students taking AP math classes. You're invited to visit the author's Questions and Answers page to find answers to previous questions or to ask your own question.

Highland Tessellations. Highland Tessellations features an animation which illustrates the concept of tesselations in a very clear way. The site also includes tessellation examples created by Highland Middle School students and links to other school tessellation pages.

Historical Tidbits. Historical Tidbits, suitable for grades 6-12, contains biographical information on influential mathematicians such as Archimedes, Georg Cantor, Leonhard Euler, and Niels Abel. You can also listen online to the pronounciation of most of their names. You'll also find biographies of famous mathematicians from the University of Venezuela's Department of Mathematics.

History of Mathematics. David Joyce's History of Mathematics features timelines with biographies on famous mathematicians. You can also find information about individual mathematicians in the Chronology. The site is suitable for high school students and teachers.

Home 2 Learn Activities. Janet Carter provides a variety of printable activity coloring sheets for preschoolers. Topics geometric shapes, telling time, and addition. In addition, the site includes an online temperature converter, (scroll to "Farenheit to/from Celsius converter"), for older kids.

Home Page for Mr. Olson. Mr. Olson provides a page full of math humor with clever sayings, quotes, and cartoons for grades 7-12.

Home Page for New Math Teachers. Home Page for New Math Teachers, created by veteran teacher Terri Santi, provides useful tips and suggestions on a variety of topics for beginning middle school math teachers.

Home Page of John Newey. John Newey provides online interactive trigonometry tutorials for beginning trig students and for advanced trig students.

Homeschool Study Resources. Homeschool Central provides a wealth of selective resources for various subject areas including mathematics for grades K-12. Although this site is primarily intended for homeschooling parents, it's also very useful for classroom teachers.

Homework Central. Homework Central provides a vast collection of math site suseful for grades k-12 divided into two categories: elementary and a middle & high school. The site also offers a search engine named "Einstein" which features a group of well-developed search engines.

Homework Helper. A+ Math provides a homework helper where elementary school students can check their computations in addition, subtraction, multiplication, division, and division with a remainder. The site allows a student to enter a problem and its answer and the computer will reply whether or not the solution is correct. A student must retry until the answer is right.

Hop's Escher Tiles. Hollister David (Hop) provides a collection of his Escher-type drawings for grades 4-12. Also, scroll to "Tessellation" to find other drawings on Hop's Pages.

How much would you weigh on another planet? NASA's Marshall Space Flight Center in Huntsville, Alabama calculates your weigh on other planets. Did you know that if you weigh 85 pounds here on Earth, you would weigh only 3 pounds on Pluto? The site provides a worksheet showing you how to calculate your weight on another planet. You can also find out how "old" would you be on another planet. The site is suitable for students in grades 5-8.

How to Make Tesselations. How to Make Tesselations provides online step-by-step illustrated instructions for constructing simple Escher-like designs for grades 6-8. For more tessellation examples, click here and for other similar sites with classroom activities, click on Glenda Woodburn's Sixth Grade Student Tessellations, the Magic of Tessellation, or CLN's Tessellation Theme Page.

Imaging the Imagined. Paul Flavin's Imaging the Imagined showcases the author's computer graphics and animations for grades 8-12. The collection includes an extensive list of Platonic Solids and Polyhedra, Buckminster Fuller's tension structures, and a well-designed analog clock displaying the time and date, and features an hourly chime.

InfoMath's Practice Page. InfoMath, a software company, provides online addition, subtraction, multiplication, and division whole number practice for elementary school students. The company also offers a homework hotline service where students find answers to their questions via email.

Integrated Resource Packages (IRP's). The Integrated Resource Packages (IRP's), developed by British Columbia Ministry of Education, feature teaching guidelines for the various K-12 curriculum areas. The mathematics IRP's for grades K-7, 8-10, the 11-12 Introductory Math, and for the 11-12 Applications of Math include prescribed learning outcomes, suggested instructional and assessment strategies, and recommended learning materials.

INTERACT. INTERACT, an online magazine of the University of Cambridge School of Education's Mathematics Enrichment Club (NRICH), provides a wealth of activities stored in its article bank. To find a specific article such as "The Magical Maze" or "Divisibility Tests" enter these words in NRICH's keyword search engine. To find a general collection of activities, enter "articles". The site is suitable for grades 5-12.

Interactive Classroom Resources. Mrs. Rogucki, from the Anne E. Moncure Elementary School in Stafford, Virginia, provides the following online interactive math programs for elementary school students: Mad Math Minutes offers whole number practice in addition, subtraction, multiplication, and division; Change It helps students learn money skills by adding up pennies, nickels, dimes, quarters, and half-dollar coins; Graph It lets students create horizontal or vertical bar charts based on the values they enter; Convert It lets students exchange area, length, speed, and temperature measurements; Compare It helps students learn and use the words or the symbols for greater than, less than, and other math expressions; and the Place Value program lets students enter a number and the program shows the place value up to a 16 digit-number.

Interactive Mathematics. Murray Bourne's Interactive Mathematics site contains a variety of pe-calculus, calculus, and advanced topics for AP math students.

Interactive Mathematics Online (IMO). IMO features illustrated step-by-step algebra and geometry guides instructional for high school students. The topics in the algebra guide cover postulates, function basics and simple graphing, function types, and function squashing. The geometry guide includes introductory topics, angles and lines, creating four basic constructions, a glossary, sample problems with answers, and other topics.

Interactive Real Analysis. Bert G. Wachsmuth's Interactive Real Analysis is an online, interactive textbook for real analysis or advanced calculus in one real variable. It deals with sets, sequences, series, continuity, differentiability, integrability (Riemann and Lebesgue), topology, and more. The site, suitable for AP math students, also includes a variety of interactive tools, such as a function plotter, a continuity checker, and a root finder, for clarifying calculus concepts.

Introductory Statistics. David Wallace of Ohio University provides online introductory statistics resources useful for high school teachers and students. Algebra and statistics students will find animated demonstrations for order of operations, solving equations, and various statistical formulas, while AP students will find practice problems and solutions in statistics to help in preparing for the SAT exam.

Investigations in Number, Data, and Space. Investigations in Number, Data, and Space developed by TERC for grades K-5, contains sample activities from this publication focusing on the concept of change. Another well-organized activity by TERC is Close to 100 .

Investigating Patterns: Symmetry and Tessellations. Jill Britton provides a well-organized collection of activity links for investigating symmetry and tessellation patterns in grades 6-12.

Investing For Kids. Investing For Kids, designed by kids for kids in grades 6-12, examines stocks, bonds, mutual funds, and other financial investments. The site also includes a stock market simulation game, an interactive quiz, a calculator, and a glossary of financial terms.

Investing in Your Future. Investing in Your Future presents the basics of investing for high school students and K-12 teachers. (When the User Name window pops up, just click on Cancel) to be able to enter. The site provides four interactive financial caculators where students can actually do "what-if" analyses on the cost of a college education, an automobile, and a house, as well as plan for their eventual retirements. For an overview of the site, click on Table of Contents. A similar site is the Virtual Stock Exchange.

Invest-O-Rama! Douglas Gerlach's invest-o-rama provides a comprehensive annotated directory of investing sites for grades 7-12. The site includes a young investing and stock market games category as well as a well-organized investor's glossary with definitions of over 500 words, phrases, and abbreviations.

IPC's Guessing Game. The Interactive Publishing Company (IPC) provides online a guess-the-number game for students in grades 5-12. The computer picks a number from 1 to 100 which you then try you guess it. After each turn, the computer tells you if your guess was to high or to low... or if you got it. The game keeps going until you get the computer's number. For a non-Java version of this game, try Erols' Guess The Number, and for a primary grades version, try The Guessing Game!.

Ivars Peterson's MathLand Archives. Ivars Peterson's MathLand Columns from the Mathematical Association of America date back to 1996 and are suitable for grades 8-12. They feature short, easy-to-understand articles on various topics that relate math with everyday concerns. You'll find essays about M&M's chocolate candies, pi, magic squares, random walks, fractals, map-coloring, primes, and other topics. At ScienceNewsOnline, you can also find Ivars Peterson's articles.

Java Applets on Mathematics. Walter Fendt provides a collection of animated diagrams that illustrate geometry concepts such as the sum of the angles in a triangle and the Pythagorean theorem. The site is suitable for grades 9-12.

Java Gallery of Interactive Geometry. The Geometry Center's Java Gallery is a collection of eight interactive geometry Java programs for high school classes. Applets include a Lorenz simulator for tracing the trajectories of points, an one-dimensional quadratic iteration for producing fractals, a simple version of the popular tetris game, IFSoft software for creating and animating fractals, and Kali for drawing wallpaper patterns.

Jeannie's Electronic Classroom. Jeannie's Electronic Classroom, part of TEAMS Web site for grades 3-8, contains geometry and algebra activities for the school and the home as well as projects and other resources. The site also includes a teacher's corner and a student work section at each grade level.

Jim Loy's Mathematics Page. Jim Loy's Mathematics Page features a collection of articles written by the author on a variety of math topics for grades 7-12. Article categories include algebra, geometry, Roman numerals, and others.

Joy of Pi. David Blattner's Joy of Pi is an exploration of its extraordinary history, from Archimedes to Leonardo da Vinci and a listing of pi to more places than you really need. The site is suitable for grades 9-12.

Judi Harris' Network-Based Educational Activity Collection. Judi Harris' Network-Based Educational Activity Collection contains a variety of collaborative and network activities that encourage communication through the use of email for grades K-12. For Internet-based mathematics activities, click here. For Judi's 1996 collection of Web-based activities, click here, and for Judi's 1997 collection of curriculum-based Internet projects, click here. In addition, Judi provides a search engine to help you find activities from her collections.

Jumpin' Jehosaphat: the Counting Sheep. Ask Jehosaphat to solve the equation, and she'll jump (and bleat)the answer! The site, created by Shawn Dodds, is suitable for primary grade children.

Just for Fun. John A. Byers' provides the following online math tricks created by the author for grades 6-12: Calculator Magic I, Calculator Magic II, and Magic 13.

Karl's Calculus Tutor. Karl's Calculus Tutor provides math homework help via email as well as online course material for AP calculus students. Topics covered are limits, continuity, derivatives and their applications, exponentials and logrithms, trig functions, and more tricks with derivatives. The site also includes its own search engine.

Kid Crossword and Other Puzzles. Brian Goss' Kid Crossword and Other Puzzles, updated monthly for grades 3-12, features a collection of over 25 printable pages of crosswords and other puzzles for various curricular areas. Its current offerings for math (January 1998) include addition, multiplication, and metric system puzzles. In the catalog, you'll find previous math puzzles.

Kids' Almanac: Measuring Up. Kids' Almanac: Measuring Up from Yahooligans teaches elementary school students about standard systems of measurement for time, money, weather, weight, and others. Students can learn about the ways people have devised to keep track of, compare, and define quantities of things. The U.C. Berkeley Chemistry Department's Common Weights And Measures page also contains tables on common U.S. and metric equivalents and other related topics.

Kid's Consumer Corner. Kid's Consumer Corner teaches students in grades 3-6 practical economics. The site helps them how to save your money, how to pick out smart buys, and even how to make money. Included is a crossword puzzle to test their understanding of of the material.

Kids Domain Downloads. Kids Domain provides a wide variety of shareware/freeware PC math programs and Mac math programs that preK-12 teachers can download to their computers. In addition, you'll find other software to download including worksheet makers, board games, and thinking games at this site.

Kid's Place at Cuisenaire. Cuisenaire, in the Kid's Place section, provides monthly hand-on activities that can be be recopied for use in your K-8 math program. The site also includes Teaching Notes to accompany each activity.

Knowledge Adventure's Lemonade Stand. Lemonade Stand is Knowledge Adventure's online money game where you try to get rich starting with $10.00 in your piggy bank. The site is suitable for students in grades 2-5.

KnotPlot Site. Robert G. Scharein's KnotPlot Site, suitable for grades 8-12, is a collection of knots and links, viewed from a (partly) mathematical perspective. The images here were created with KnotPlot, a program to visualize and manipulate mathematical knots in three and four dimensions. You can feast your mind and your eyes on the images and animations in the various collections including the knot zoo gallery.

Laser Math. Laser Math, from Brøderbund's Carmen Sandiego Math Detective for grades 3-7, is an interactive place value/logic game where students put the lenses in the right order to make the "Light Spectrometer" work. The game has seven levels of play, and you must download Macromedia's free Shockwave plug-in to play the game.

Launch into Math. Launch into Math features a collection of Internet-based math and space projects to further student understanding the NASA Space Shuttle program. The site also includes student guidesheets that can be recopied for use in 4-8 classrooms.

Learning Kingdom Playground. The Learning Kingdom clearly explains and provides examples to the following math shortcuts for students in grades 5-12: the Blankety-Five Squared trick for squaring two-digit numbers that end in five, and the Eleven Times trick for multiplying two-digit numbers by eleven.

Learning Numbers through Play. Learning Numbers through Play provides early number teaching tips for preschool and kindergarten children.

Lemonade Stand. Jason Mayans' Lemonade Stand is online version of this classic game for students in grades 5-8. It teaches basic business math (sales minus expenses equals profits). The object of the game is to make as much money as possible in 25 rounds. Before each round starts, you review the weather forecast. Then you decide how many cups of lemonade to make, and how much to spend on advertising. At the end of each round, you receive a summary of how many cups sold and how much profit was made.

Linda's Electronic Classroom. Linda's Electronic Classroom , part of TEAMS Web site for the primary grades, contains geometry activities for the school and the home as well as a teacher's corner with professional resources. Teachers will also find other math activities in the Web Links section.

LineOne. LineOne features exercises and activities in reading, writing and math for grades preK-4.

Local Times Around the World Local Times Around the World is an online guide for providing the different local times around the world. The Date and Time Gateway also tells the date and time in numerous locations around the world. These sites are suitable for grades 7-12.

Logical Art and the art of Logic. Guenter Albrecht-Buehler's site the Logical Art and the Art of Logic is where students in grades 6-12 can learn about pentomino patterns and view a gallery of pentomino wood mosaics. To learn more about this topic, students can also visit Ashish Mahabal's site and enjoy his online program that automatically generates on a 6 by10 grid pentomino arrangements. (Click on Pause to see an individual solution.)

Look Who's Footing the Bill. Look Who's Footing the Bill is an introduction to the national debt for grades 7-12. It guides students through the process of developing a group project on the problems the U.S. economy must face in relationship to the national debt, and its long term effects on society. The site includes links to several interactive resources about the national budget.

Lopaka's Online Math Projects . Robert Garry of the Hawaii Community College offers a collection of "Divers Maths" projects including "The Great Balsa Bridge Contest", "The Rubik Meme", and "Polyhedra Stained Glass Lamps". Each project, suitable for high school honors math classes, includes links to Internet resources for background exploration. (Lopaka is the Hawai'ian word for Robert).

[ top ]