Ideas and Activities

About.com's Homework Help. About.com provides a searchable collection of articles that can help students with their math homework as figuring out the angles of a right triangle. The site, suitable for grades 3-12, also includes a library of useful Netlinks as well as Cathy Spalding's email service for your perplexing math questions.

About Today's Date. About Today's Date, based on Richard Phillips' book Numbers: Facts, Figures , and Fiction, provides each day the history and trivia about the numbers in today's date. The site is suitable for grades 5-12.

Academic Assistance Access. Academic Assistance Access offers free a tutoring service for high school students. The site, staffed by professionals in various fields, answers questions in calculus as well as in American history and the sciences.

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.

ACT Assessment Sample Test Questions. The American College Testing Program (ACT) provides online a variety of sample test questions to help high school students prepare for the ACT test. Included are five sets of mathematics tests with answers.

Air Force Link Jr. -Math Mission. The U.S. Air Force offers an interactive, animated adventure story for grades 2-5. Students answer math questions helping Captain Zoom fulfill an urgent mission to outerspace. Another online math game for younger cadets is the popular connect the dots.

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.

Alan Turing Home Page. The Alan Turing Home Page, a companion to the Andrew Hodges' book, Alan Turing: The Enigma, contains biographical information about this English mathematician who cracked the German U-boat Enigma cipher in 1940. You'll learn that he was the originator of the computer as we know it today, founded of computer science in 1936, and started the artificial intelligence research in 1950. The site is suitable for grades 8-12.

ALFY's Math Games. ALFY, for children between the ages of 3 to 10, offers a wide variety of online number and counting games collected from different Internet sources. For pattern and shape math games, click here.

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 Help. Algebra Help provides online help for algebra students. The site includes tutorials, problems, and algebra calculators.

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 Activities. Long Isand University's Technology, Education, and Multimedia (T.E.A.M.) project contains a collection of math activities for grades 7-12. Topics include algebra, fractals, geometry, number theory, and probability.

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

ALOHA Virtual Classroom. The ALOHA Virtual Classroom provides mental arithmetic activities using finger and abacus as the calculation tools for students in grades 4-6.

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). The AMOF provides information on a variety of discrete math topics 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. Click here for a mirror site.

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 on the Web. AP Calculus on the Web provides a wide variety of resources for AP calculus students and teachers.

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.

Argyll Home Education Services Centre. Jim Reed of the Edmonton Public Schools' Argyll Home Education Services Centre provides an extensive and well-organized collection of online interactive tutorials for students in grades 4-9.

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

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.

Aunt Annie's Crafts: Boxes and Bags. Aunt Annie's Crafts provides a variety of art projects useful for students learning geometry in grades 6-12. Students can make their own boxes and bags in different shapes, sizes, and designs. To view all these projects, click here.

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.

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.

Baby Place: Children"s Games. The Baby Place provides an online addition and a subtraction game for grades K-2.

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 Concepts and Fundamentals. R.H. Logan provides review material, such as solving algebraic equations, understanding the scientific notation, doing metric conversions, understanding significant digits, and other math topics useful for high school science students.

Basic Math Practice. Leland R. Beaumont's Basic Math Practice provides online drill exercises in addition, subtraction, or multiplication for elementary school students. Speier Associates offers another easy-to-use Multiplication Speed Drill .

Basic Multiplication. Basic Multiplication provides a collection of multiplication tricks for grades 4-8.

BasketMath Interactive. Science Academy Software provides a wide variety of interactive math problems where students in grades 4-9 can improve their math skills. Answering the question correctly results in a basketball shot animation; incorrect responses yield the correct answer. To find out your score on a test, scroll to the bottom of the panel and click on Results. Topics include whole number computations, rounding numbers, finding the common factor, word problems, decimal computations, exponents, and many others.

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.

BHS Calculus Student Projects. The site contains 23 group projects using the Internet to solve "real-world" calculus problems. These projects were done by AP caculus students at Bloomington High School in Illinois.

6 Billion Human Beings. 6 Billion Human Beings is an online exhibit from the Musee de l'Homme in Paris where middle school students can find out interesting number facts associated with population. Students can learn about how fast the world's population is growing, why it may slow in the next century, and the number people on earth when they were born. The site requires Macromedia's free Shockwave plug-in.

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 site lists over 150 biographies of women mathematicians illustrating their past and present achievements. 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.

Blue Web'N. Blue Web'N, provided by Pacific Bell, contains a library of learning sites that includes over 40 mathematics Web based activities and projects for K-12 students to complete online. Scroll to "Browse the Content Table" and find "Mathematics".

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.

Bonus.com: Math Fun. Bonus.com provides online over 40 fun math activities and games for students in grades K-6.

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.

By the Numbers! Kinder Magic Software maintains By the Numbers! Web site which offers a variety of online basic math exercises with step-by step explanations for students in grades 6-12. Topics include addition, subtraction, and multiplication of whole numbers and fractions, as well as percent markup and rounding decimals. The site also shows students how to budget and includes a glossary of consumer math terms.

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@Internet. San Joaquin Delta College in Stockton, CA provides a wide variety of pre-calculus and calculus reources for high school students in advanced math classes. Included are teaching materials, applications, and exams.

Calculus@UTK: Math 141. The University of Tennessee at Knoxville provides online a calculus primer for AP students and teachers. Topics covered are functions and models, limits and derivatives, differentiation rules, and applications of differentiation. Math 142, the next online calculus course, includes integrals, differential equations, and infinite sequences and series.

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 on the Web. Gerardo Mendoza and Dan Reich's Calculus on the Web features a collection of over 250 interactive modules for learning and practicing calculus methods and concepts. The site is suitable for AP math classes.

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".

Captain Quest and the Evil Mathematician. MediaCity provides an ongoing story with math problems to solve to continue the story, entitled "Captain Quest and the Evil Mathematician". The site is suitabe for middle school students.

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.

Chance and Data in the News. Chance and Data in the News covers data collection, sampling, representation, and probability through Australian newspaper articles, each of which features a discussion, questions, and link to associated topics. Click here for the main sections. The articles are also cross-referenced by crime, diet, gambling, sport, and other topics. The site is suitable for grades 9-12.

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.

Children's House of Cool-Math. Children's House of Cool-Math provides a collection of math short cuts and number tricks that kids can use to amaze their classmates in grades 4-7. For another page of math tricks, click here.

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.

Chips Ahoy. Nabisco's Chips Ahoy features Millennium Math Mania, other math activities and games, and a Teacher's Corner with tips for grades 3-12.

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's A+ Web Links. Classroom Connect provides a library of hundreds A+ Web Links to selected sites for grades K-12. Math teachers can find sites for curriculum, instruction, and other resources organized by grades K-6 and 7-12.

Classroom Connect's Teacher Contact Database. Classroom Connect provides a searchable database of over 4,000 K-12 teacher email buddies who use the Internet in their classrooms. You can search by the teacher's name, school's name, age of the students, and by the subject area.

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.

Click on Bricks. Click on Bricks provides16 practice problems using colored bricks to display arrays. This site can help primary grades students to learn the multiplication facts for the first four tables. Also, included is an instructional page with background information on teaching multiplication and related online resources for practicing the multiplication facts.

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.

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".

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.

College Board Online: Sample Math Questions. College Board Online provides math questions from previous PSAT and NMSQT tests for high school students as well as a SAT Question of the Day. The Princeton Review also offers online sample SAT sample questions.

COLOR. The Cultural Online Learning Organization & Resource (COLOR) program provides math history resources for Asia, Africa, and the Americas. Did you know that Hsiang Chieh Chiu Chang Suan Fa developed Pascal's Triangle about 300 years before Pascal? Go to the math texts section of the Development of Mathematics in Ancient China page for proof. The site is suitable for grades 8-12.

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

ColorSums. ColorSums is an online version of the picture color-in worksheets for elementary school students. Students first must figure out the answer to a math problem. They choose the answer from a list, and then click in the area with that problem. Watch it fill up! Finish a picture and you'll get a new one to color.

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 Curriculum Project.Frank Wattenberg's Connected Curriculum Project from Montana State University provides an interactive study of calculus featuring 'real' problems. The site, suitable for AP math students, includes detailed instructions on using the TI-92 calculator.

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.

Coolmath.com. Cool Math provides illustrated explanations and examples of functions, tessellations, Platonic solids, limits, and other math topics in the "lessons" section. The site, suitable for grades 7-12, also includes a collection of math resources organized by subject area.

Cool Math and Science Sites. MathSoft's StudyWorks provides a list of "ask-the -expert" sites where students in grades K-12 can find help in mathematics. Scroll to "Online Help Services" to find these resources. Similar "ask-the -expert" sites are Yahoo's and Canada's Community Learning Network, and Allexperts.com's Math.

Counting Game. Chris Malumphy provide an online counting game for preschool and kindergarten children starting to count. A child is shown a number of objects and asked to click on the correct number button. A thermometer graphic tells the child when he/she has correctly answered ten questions.

Count Hoot's Number Activity. Count Hoot, from BBC Education's The Little Activity Center, provides online addition, subtraction, and addition/subtraction games for preschool and primary school kids. Each game include three difficulty levels and requires Macromedia's free Shockwave plug-in. BBC Education also offers a Clockwise game in the Dynatastic Den for telling time.

Count Me In. Count Me In from from BBC Television provides four interactive activities where students play a number trick, make addition combinations, and explore the Pythagorean theorem and the Fibonacci sequence. These online games require Macromedia's free Shockwave plug-in. The site is suitable for grades 5-8.

CourseServer. Fairbanks Country Day provides CourseServer, an online math problem generator for both students and teachers in grades 1-12. It allows you to select from thousands of different problem types and then automatically generates problem and answer sheets which can be printed. This excellent resource offers practice problems from beginning math concepts through advanced Algebra II.

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.

Curriculum Connections. Curriculum Connections from the Park Maitland School contains a variety of math games and activities for students in grades 1-6.

CUWU Statistics Program. The CUWU Statistics Program, created by John Marden of the University of Illinois at Urbana-Champaign, contains many Java applets for visualizing statistics and demonstrating principles of probability and statistics. Students can perform online simple data analyses used in basic statistics, histograms, "split" histograms, scatter plots and regression, and calculations. Students can also do simulations of drawing tickets out of a box illustrating the central limit theorem, confidence intervals, and the law of averages as well as play interactive games such as quessing correlations by matching correlation coefficients to scatter plots. For a complete list of the site's contents, click here. The site is suitable for AP students.

CyberCal: An Interactive Learning Environment for Calculus.Michele Williams of Saint Michael's College provides an online calculus textbook covering review topics, limits and continuity, and derivatives for AP math students.

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. Other interactive math games from Knowledge Adventure are Connect the Dots, Frog Well, and Cannon Ball Lake.

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.

DAU Tutorial Modules. The DAU Tutorial Modules provides online a comprehensive review of basic mathematics, probability, and statistics for high school students. To find a map with links to all the math topics, click on Math Refresher and to find a map with links to all the probability and statistics topics, click on Statistics Refresher. These interactive modules were built for the Defense Acquisition University for students needing assistance with high school level subjects in mathmatics.

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.

Definition of Math Terms. The Highline School in Seattle provides list of math terms useful for students in grades 4-8.

Derick Yung's Games and Tricks. Derick Yung provides online a math trick which will determine your birthday, a quessing game where you try quess the computer's number, and a master mind game where you try figure out the exact positions of each of the four colors. The site is sutable for students in grades 4-8.

Derrand Education Web Site. Derrand Education Web Site provides online math practice for students in grades K-6. The practice questions include answers.

Developing Educational Standards. The Putman Valley Central Schools in New York provides an annotated list of Internet sites with K-12 educational standards and curriculum frameworks documents. To find mathematics documents by state, click here or click on Math.

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.

Did you know that... Alexander Bogomolny from the aothor's Interactive Mathematics Miscellany and Puzzles site provides a collection of over 65 math curiosities for students and teachers in grades 6-12. Did you know that... in a group of 23 people, at least two have the same birthday with the probability greater than 1/2 ; the word 'fraction' derives from the Latin fractio - to break. However, there are continuous fractions; and a sphere has two sides. However, there are one-sided surfaces. To view one-sided surface animations like a Moebius strip, click here.

Digital Mathematics Archive. The University of British Columbia Mathematics Department provides a digital collection of mathematical sources, with a primary focus on documents from the late 19th century through today. Included are the selected works of Robert Langlands and Oliver Byrne's edition of Euclid. The site is suitable for grades 9-12.

Don Archer's Legendary Fractal Art and Music and U-Draw Fractals. Don Archer provides a collection of fractal art created by Fractint software progam. You can create your own fractal drawing by using this online U-draw program. To view the best of of the U-draws, click here.

Don Archer's Legendary Fractal Art and Music and U-Draw Fractals. Don Archer provides a collection of fractal art created by Fractint software progam. You can create your own fractal drawing by using this online U-draw program. To view the best of of the U-draws, click here.

Dr. Caffeine. Dr. Caffeine, C. Thomas Wu's site, provides an online interactive table that can help elementary school students learn their multiplication facts. A student enters two numbers and press the enter key to see the answer displayed in the table. Other useful interactive tools are the Clock Applets.

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.

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.

Educational Java Programs. Jacobo Bulaevsky's Java site provides interactive applets for introducing fractions, fraction operations, and geometric concepts in grades 5-8. Both the Pattern Blocks and the Fractals progams include includes instructions on how to use the applets, exercises, and activities for the students.

Educational Object Economy(EOE). EOE provides a collection of hundreds Web-based learning tools for grades K-12. The library contains Java applets for general mathematics, algebra, geometry, and other math topics.

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 a free 20 minute delayed stock market simulation game and a tutorial on how to pick good stocks. It also profiles a group of well-known companies like Coca Cola, McDonalds, Nike and others to help you start your research into what stock is going to make your fortune. The site is suitable for students in grades 7-12.

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.

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.

Elementary Statistics Interactive. Wlodzimierz Bryc of the University of Cincinnati provides a wide variety of interactive elementary statistics exercises and quizzes for AP students. For a collection of other online statistics resources including simulations and tutorials, click Elementary Statistics Interactive.

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.

Enchanted Learning's Connect-the-Dots. Enchanted Learning Software provides a collection of online connect-the-dot math games for preschool and primary school kids. Kids click on the dots in order to make a picture, and each game includes a clue describing the missing picture. The site also offers printable activities where kids color butterfly and dinosaur picture worksheets by finding answers to the math problems.

ESPN SportsZone: Behind the Numbers. Behind the Numbers, suitable for grades 7-12, is a collection of articles by ESPN SportsZone's resident mathematician, Jonathan Sills. He writes about the mathematics of sports from World Cup Soccer qualifying to the World's Strongest Man Competition to Beanie Babies effect on attendance.

Ethnomathematics on the Web. Ron Eglash of Rensselaer Polytechnic Institute (RPI) provides an extensive collection of sites related to multicultural mathematics education for grades 7-12. Dr. Eglash also offers other cultural diverse resources for math like African Fractals and the African Influences in Math and Science History .

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.

Evergreen Curriculum. The Saskatchewan Education Curriculum and Instruction Branch provides a variety of mathematics curriculum guides for grades 1-5, grades 6-9, grades 10-12, and advanced math classes in grades 10-12. Each curriculum guide contains daily routines, instructional ideas, evaluation techniques, and sample units.

Exact Change, Please. The Tennessee Department of Financial Institutions provides an exact change finance game for grades 3-8. The game 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.

Exam Writer. Exam Writer, developed by L. Joshua Leon of the Institut de génie biomédical at the Université de Montréal, is a tool that allows you to create an exam on the Web consisting of a variety of short answer, true/false, and multiple choice questions. All you do is fill out the forms provided with your questions, correct answers, comments, and any image files you want included. This Web quiz creation tool checks the answers for you and can even email you the results.

Excel in the Classroom. Kathy D. Adkins provides a collection of ideas and online resources for using Excel, a spreadsheet program, in the elementary school classroom.

Excellent Adventure.Excellent Adventure, created by Shawsheen Tech for grades 6-12, is an Internet-based math activity where students take an online trip down the East coast to Disney World with several required stops and activities along the way. The site includes a teacher's guide and printable student worksheets.

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.

Exploring Fractals. Mary Ann Connors provides a series ofinvestigations for exploring and for generatingfractals at the high school level.

Family.com: Education. Go Network's Family.com provides a collection of articles loaded with activities for grades preK-8. To find math activities, click here or choose the age you want and the math/science topic from the pull-down menus in the education bank.

FamilyEducation Network. The FamilyEducation Network 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.

Famous Mathematicians. ScholarNet provides short biographies of 26 famous mathematicians from Pythagoras to Einstein. To access the site, type the word "hod" in the name box and "free" in the password box.

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'. You can also download the first chapter of Professor Sethian's book.

FasTrack Muliplication Tables. FasTrack provides an online basic facts generator to help elementary school students find specific products and review the multiplication tables.

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.

Final Bell. Sandbox provides Final Bell, a realistic stock trading simulation for grades 9-12. Students can learn the basics of investing online free of charge.

Finite Mathematics Applied Calculus Resource Page. Hostra University's comprehensive Web resource for finite Mathematics and applied calculus contains tutorials with clear explanations and examples, online texts, quizzes, and exercises. The site is suitable for AP math classes.

Flash.Megakids' Flash provides online math table practice for grades 3-7. Students can chose addition, subtraction, multiplication, or division to find out how fast they can solve the tables!

Flashcards. A+ Math provides a collection of interactive flashcards to help students in grades 2-7 improve their math skills. There are Java as well as a non-Java flashcards. 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.

FleetKids. FleetKids, created by Headbone Interactive for the Fleet Financial Group, provides interactive games that help elementary school students learn about money management, good citizenship, the importance of teamwork, and more. To play the games, you must sign up.

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.

FourColor Applet. Chris Coring provides an interactive pattern coloring game for exploring online the four color theorem in topology. Mathematicians claim that you can make any pattern consisting of only four colors with none of those colors touching. For a brief summary of a new proof of the four color theorem, click here. These sites are suitable for grades 5-12.

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.

Fractals. Gregory J. Vogl provides an easy-to-use Java applet program for creating fractals online. Read the instructions before designing your own geometric drawings. The site is suitable for students in grades 6-12.

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.

Fractions Applet. Mike Morton's Fractions Applet program has you click on squares inside a rectangle to make a fraction. This interactive visual tool which associates an area with a fraction, can help intermediate grade students better understand fractions and equivalent fractions.

Fractionator. Pierian Spring Software provides an online interactive fraction game (Fractionator) for students in grades 4-8. Students slide a different bar for the numerator and the denominator to make a fraction.

Fraction Frenzy. Michael Schipper's Spacey-Math is an online, fast-paced, multi-level game where students in grades 4-8 try to match equivalent fractions before time runs out. In order to play the game, you' ll have to download Macromedia's free Shockwave plug-in.

Fractory. Fractory is an interactive tool for creating and exploring fractals in grades 7-12. Other good places to learn about choas theory and fractals are Chaos & Fractals and Chaos Introduction.

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.

Friends of Pi. Friends of Pi provides information all about pi for grades 9-12. Another similar page is Olov Windelius'.

FunBrain.com: Games. FunBrain provides a wide variety of interactive learning games for students in grades 3-7. To find math and logic games, scroll to Subject.

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.

Funschool.com. Funschool.com provides an extensive collection of preschool through sixth grade games and activities. Included are alphabet and number games, connect the letters, concentration games, opposite challenges, jigsaw puzzles, and much, much more. For a list of all the site's activities arranged by grade level, click here.

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.

Garden of Origami. The Garden of Origami contains detailed intstructions for creating figures and and other orgami classroom activities for grades 4-12. This comprehensive site includes the history and origins of origami, folding diagrams, resources, lesson plans and activities, and related arts and links.

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.

Gavin's Calculus Projects. Gavin LaRose of Nebraska Wesleyan University provides a collection of calculus projects from 1995 involving solutions of real problems. The site is an excellent source of study material for the AP calculus exam.

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. Its latest additions are Heavy Duty Algebra and Heavy Duty Functions and Sequences. Teachers can easily use this material in their math classes, and students can use it to prepare for the SAT I or ACT tests.

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

5 GeoKids Interactive Puzzle Pages. 5 GeoKids provides a collection of online interactive and printable puzzle pages organized by grade level for grades preK-7. Most of math puzzles are straightforward computational worksheets. The dinosaur math puzzles, however, have you use the answers to solve a word riddle. Included are puzzle pages for the holdays, English, math, reading, and spelling. Each puzzle page is accompanied by an answer or solution sheet.

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 Gallery. Saltire Software provides a collection of interactive Java applets for exploring various concepts in high school geometry. Included are basic geometry applets, triangle calculators, and advanced geometry applets.

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 Made Easy. Gregory Nussberger provides online a geometry tutorial with topics from angles and lines to constructions for high school students. The site also includes an useful glossary of geometrical terms.

Geometry Step-by-step from the Land of the Incas, provides an eclectic mix of sound, science, and Incan history intended to interest students in Euclidean geometry. The site includes geometry problems, quizzes, quotations, scientific speculation, and more.

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".

George W. Hart. George W. Hart provides his Pavilion of Polyhedreality with a collection of over 1,000 virtual polyhedra and a sizeable list of related geometry sites for grades 8-12. Be sure also to visit his geometric sculpture art.

Ginn Maths Mega Store. Ginn Maths Mega Store provides a variety of mental math and practical activities, games, projects, investigations, and other resources for grades K-5. The site includes 'tasters' of some of Ginn's own published materials that can be printed and copied for classroom use. For an archive of activities previously featured on Maths Mega Store, click on Back Issues.

Glencoe Online Mathematics. Glencoe Online Mathematics provides a variety of pre-algebra cooperative group activities for students in grades 6-12. You'll find printable activities and learning games for algebra, geometry, number operations, problem solving, statistics/probability, and other math topics here, here, here, here, and here.

Glencoe Online Mathematics Applications and Connections. Glencoe Online provides the following sets of interactive math games and activities for middle school students: (1) Set 1; (2) Set 2; and (3) Set 3. To play these games online, you must download Macromedia's free Shockwave plug-in. Glencoe also offers five games for your algebra students. To view and print these classroom games, you must download Adobe's free Acrobat Reader.

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.

4th and 5th Grade Student Research Resources. 4th and 5th Grade Student Research Resources contain a collection of math resources for grades 4-7 as well as another collection of arithmetic games and activities for grades 1-3.

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-4. The site also offers the author's other materials and games for teaching a variety of other math topics in grades K-4. Included are whole number computational skills, fractions and decimals, factors and multiples, prime and composite numbers, and casting out nines.

Graph Challenge. The University of Delware's Alphabet Superhighway Home Page provides pie, bar, and line graph challenges where middle school students try to answer questions using information from graphs. The site also includes a bar graph maker for creating your own bar graphs and a step-by-step tutorial for making a line graph.

Graphs. Gregory J. Vogl provides an interactive Java applet program for creating hundreds of graphs online. It teaches principles such as variable substitution and function composition by encouraging the user to experiment with variables and look at random functions. The site can help students in grades 6-12 learn more about numbers and variables.

Graphics for the Calculus Classroom. Douglas N. Arnold provides a collection of interactive graphical demonstrations to illustrate and enrich the teaching of first-year calculus concepts. Samples include differentials and differences, computing the volume of water in a tipped glass, Archimedes' calculation of pi, how the ball bounces, the limit, and others. The site contains both animated GIF and Java versions.

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' Greenwood Elementary. The Greenwood Elementary School in Missouri provides a collection of math sites for students and teachers in the primary grades as well as in the intermediate grades.

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.

Guessing Game. Netpedia 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 to 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. MathsNet offers a similar guessing game.

Guess the Number. Guess the Number is an interactive game where students have 9 chances to guess the computer's number between 1 and 1,000. This fun online activity, suitable for grades 6-12, can help students improve their problem solving skills.

Hamilton's Math to Build On. Math to Build On Web site contains excerpts from Johnny and Margaret Hamilton's book Math to Build On. The site provides practical math tips and shortcuts, a non-technical math glossary, and basic geometric constructions in the "Seeing is Believing" chapter for grades 7-12. An useful list of math definitions to complement this site is Highline's.

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.

Harcourt Brace School Publishers: Math Advantage. Harcourt Brace School Publishers provide a wide variety of interactive math activities and materials for students and teachers in grades K-8. At each grade level, you'll find a separate link to "Resources for Teachers" on top of the page. Some of the activities and materials require the following free Plug-ins: Shockwave, QuickTime VR, or Acrobat Reader