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AAA MATH - http://www.aaamath.com
This site contains hundreds of pages of basic math skills, interactive practice, an explanation of the math topic on each page, several challenge games and randomly created math problems from K to 8. The site is arranged by grade level or math topic -- cool.

ABACUS - http://www.ee.ryerson.ca:8080/~elf/abacus
You or your students can receive instructions here on how to add or subtract using this ancient yet modern calculator. A good site to help you supplement your units on Asia or the ancient Aztecs.
ABSURD MATH - http://www.learningwave.com/abmath/
Net surfers run the risk of being sucked into one of the dimensions created when the World Wide Web was created. Excellent problem solving simulation with links to other similar software

AIMS - http://www.aimsedu.org/
Archives, puzzles, downloads, curriculum and ideas for Math and Science

ALGEBRA: IN SIMPLEST TERMS  - http://www.learner.org/resources/series66.html
The Annenberg Foundation provides a total of 26 episodes in this "Algebra: In Simplest Terms" series that covers such topics as linear relations, the ellipse, rational functions, and geometric sequences. Narrated by Sol Garfunkel, the series uses practical examples as illustrations of various principles and axioms.NOTE: to watch the videos, visitors will need to fill out a free online registration form.

ALL ABOUT FRACTIONS - http://www.aaamath.com/fra.html
Dozens of colorfully illustrated pages with explanatory lessons and interactive practice games  Using the Table of Contents, you can jump directly to one of ten chapters (such as Multiplying Fractions, Reducing Fractions and Comparing fractions) or start at the beginning (Basic Fractions) and use the Next Lesson link to continue through the site.  My favorite clicks are the timed exercises you'll find at the bottom of each lesson page.

ALLMATH FLASHCARDS - http://www.allmath.com/
Choose your operators (any combination of addition, subtraction, multiplication and division.)  Then choose what size operands (from ten up to a hundred) and if you want to keep score.  Finally you have the option of AutoFlash, which will change cards automatically at a variety of speeds, from every two seconds up to every minute.  This really keeps things moving -- and adds a bit of game show excitement!

A+ MATH! - http://www.aplusmath.com/
This web site was developed to help students improve their math skills.  Visit the game room and play exciting games like Matho and Hidden Picture...Test math skills with Flashcards or Math Word Find puzzles. Create and print your own set of flashcards with Flashcard Creator. Also see Worksheets section, where you can print worksheets to practice offline. Try the Homework Helper to check your homework solutions, download games free.

AUNTY MATH - http://www.dupagechildrensmuseum.org/aunty/index.html
Fun Math Challenges for K-5 learners.

BASEBALL REFERENCE - http://www.baseball-reference.com/
One of the hobbies that has taken root as an offshoot of our national pastime is the compilation of baseball statistics and mythology. Baseball reference is a fully searchable, one stop site that brings together all the facts, figures and lore fans crave. Here you will find everything from batting averages and career leaders to team profiles and birthdays. And the links to news, analysis and travel information makes this site as useful as it is fun. Have your students practice as they plan a week-long travel itinerary following their favorite team's schedule

CHANGEMAKER - http://www.funbrain.com/cashreg/index.html
A Funbrain simulation in which students can practice making change for a dollar or for one hundred dollars.

CONSUMER JUNGLE - http://www.consumerjungle.org
Consumer Jungle features consumer education curriculum including printable classroom materials and interactive student activities (Credit Cave Activities include Find the Fees and the Credit Card Safari). Units include the Credit Cave, Surviving Solo (tips for living on your own), Esmarts (safe surfing on the web), Car-fari, and Jingle in the Jungle (the mysteries of phone, cell phones, and internet service).

COOLMATH.COM - http://www.coolmath.com/
An amusement park of mathematics,  this site has loads of lessons, activities, links and resources. Check out games at  COOLMATH4KIDS at http://www.coolmath-games.com/

COUNTERFEIT DETECTION - http://www.indigoimage.com/count/index.html
How do you know if your money is counterfeit or genuine?  Visit this fun site and learn all about the security features on a banknote ... the bits that make them difficult to copy. Then take a look at your own money and decide for yourself.

COUNTON - http://www.counton.org
This website from the UK has many areas for students to explore in the area of maths (mathematics). You can click X + Y Files,  Puzzles, features describing mathematical tools, and many activities that appeal to students from kindergarten to eighth grade.  Students in the UK can also participate in competitions.

CREATE A GRAPH - http://nces.ed.gov/nceskids/graphing/
The National Center for Education Statistics created this online tool so that anyone can make an  area, bar, pie or line graph and print it out or download the image to a computer or disk. Older students can benefit from the link that shows how graphs can be used in probability. Younger students will quickly learn the difference between the left X and Y axis when they need to create their own line graphs.

CYBERCHASE - http://pbskids.org/cyberchase/index.html
Cyberchase is a daily animated adventure television series and multimedia project for children ages 8-11. Cyberchase helps kids discover that math is fun. The site is updated to provide content specific to the day’s broadcast episode on a daily basis. On a weekly  basis, kids can participate in online polls and send each other e-cards.  On a monthly basis, an Original Adventure will be added to the site. There is also permanent content. Lesson Plans and additional information in the Parents & Teachers section. Produced by PBS Kids.

DO YOUR MATH - http://www.doyourmath.com/all_tests.asp
Do Your Math offers practice tests for PSAT and SAT math items, and they're quick loading and browser-friendly. Each test has several dozen questions and your score is tallied on the 800 point SAT scale upon your completion. Do these problems give you trouble? Then go to GoMath http://www.gomath.com/ where they offer interactive, animated demonstrations of all kinds of Math principles and concepts!

ELEMENTARY ARITHMETIC ACTIVITIES - http://www.geocities.com/EnchantedForest/Tower/1217/math1.html
Check out this site. It's a comprehensive listing of working links to all kinds of Math activities, games, puzzles and more for elementary-aged children. You may not need another Math link this year if you make use of all these sites!

ELEMENTARY PROBLEM OF THE WEEK - http://mathforum.org/sum95/ruth/elem.pow.html
Challenges elementary students with problems and encourages them to verbalize solutions. In conjunction with a companion project, registered students have their submissions answered by "Visiting Math Mentors" and also have the opportunity to become a mentor

E-MATH - http://www.ed.gov/pubs/emath/
A guide to e-mail based volunteer programs designed to help students master challenging Mathematics, Science and Technology

ENCHANTED MIND - http://www.ed.gov/pubs/emath/ http://www.ed.gov/pubs/emath/
This site attempts to create a daily experience of humor, inspiration and creative problem solving

EXPLORE MATH  - http://www.explorelearning.com/
For students having a tough time with the concepts of slope calculation and distance formula, try some of the lessons fellow teachers have contributed to ExploreMath, a site that features lessons,  multimedia activities (requiring a Flash plugin), and Math in the News. Check out Gizmos!

EUCLID'S ELEMENTS - http://aleph0.clarku.edu/~djoyce/java/elements/elements.html
All 13 Books are illustrated - even those on solid geometry that are three-dimensional; superb HS Geometry site.

FAMILY EDUCATION NETWORK: PIGGYBANK - http://fen.com/studentactivities/Piggybank/piggybank.html
"Can you choose coins that add up to an amount of money?" As coins fall from the top of the screen, click on them to reach your goal. To remove a chosen coin from your total, simply click on it again. Easy level shows the sum of your chosen coins. When playing at the hard level, you have to keep the running total in your head. The game is won when your piggy bank is full.

FAMOUS PROBLEMS IN THE HISTORY OF MATHEMATICS - http://mathforum.org/isaac/mathhist.html
The Math Forum offers this wonderful collection of timeless Math puzzlers such as The Bridges of Konigsberg, the Pythagorean Theorem and the properties of prime numbers. This is a great companion to the AIMs Historical Connections in Mathematics series.

FIBONACCI PUZZLES - http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibpuzzles.html
Your students can study sophisticated patterns, image and number puzzles based on Mathematics.  Split into simpler and harder degrees of difficulty.

FIGURE THIS! - http://www.figurethis.org/
Figure This! is a series of fun problem solving challenges presented by the National Council of Teachers of Mathematics that combines creative ideas with sound Math principles. About 40 challenges like How long would you have to wait if you were number 300?  In Spanish and English.

FRACTION TO DECIMAL CONVERSION - http://www.sisweb.com/math/general/arithmetic/fradec.htm
A handy reference on converting fractions to decimals. Fractions from 1/1 to 31/32 are neatly organized into a table showing their decimal equivalents.

FRACTIONS - http://www.surfnetkids.com/fractions.htm
Do fractions make you sweat?  Whether you are a student or a parent helping a student, I've found five sites that will take you by the hand and explain everything you've always feared you could never learn about fractions. Take a deep breath. Ignore the pop-up window.

FRACTIONS - http://www.iit.edu/~smart/dvorber/lesson5.htm
Links to all sites about fractions. This is for 6th and7th grades, but the links will take you to links...etc.

FUN MATH LESSONS - http://math.rice.edu/~lanius/Lessons/
Cynthia Lanius of Rice University presents this myriad of Math lessons ready to use with students. Check out Let's graph, Fun and Sun Rent-A-Car , the Million Dollar Mission  and Geometry Online.  Something for everyone.

GOMATH - http://www.gomath.com/
Interactive, animated demonstrations of all kinds of Math principles and concepts!

GRAPHING IDEAS - http://www.fi.edu/qa98/me5/me5.html
Create graphs and charts from spreadsheets in various styles to reduce drawing and coloring and get right to the exercise of selecting, interpreting and querying data. (They use the Microsoft WORKS program in the computer lab for this activity.) You can use Appleworks spreadsheet or Excel.

HARCOURT BRACE MATH GLOSSARY -http://www.hbschool.com/index.html
Just click on a grade level and you're off!  Neat visuals and other stuff.

HISTORY OF MATHEMATICS ARCHIVE - http://www-groups.dcs.st-and.ac.uk/~history/index.html
Overview of the history behind the Math: Biographies Index, History Topics Index, Birthplace Maps, Mathematicians of the day, Anniversaries for the Year, a Famous curves JAVA index and Chronologies.

HOW FAR IS IT? - http://www.indo.com/distance/
Calculates the distance between two places, you input the locations - from the U.S. Census Bureau

KIDS CLICK - http://sunsite.berkeley.edu/KidsClick!/
A web search for Kids by librarians, includes topics like Weird & Mysterious, the Arts, Math and Science and Literature.

ILLUMINATONS FOR MATH - http://illuminations.nctm.org/
Illuminations for Math has links to lessons, standards, tools, and reviewed web resources.  Good stuff.

KING'S MATH - http://www.k111.k12.il.us/king/math.htm
This HOTLIST organizes most of students' basic math needs into categories, then links the user to directly to webpages that have a tool or game to meet that need. Under Graphing, there is a link to Gere’s Bike Shop, an activity at BBC Online. This site links to activities from all over the globe. May be pop-up ads to ignore.
LAURA CANDLER'S FILE CABINET - http://home.att.net/~teaching/filecab.htm
In the file drawers, you will find all sorts of activity sheets and blackline masters created for the classroom. All of them are in PDF format, so you will need the free Adobe Acrobat Reader plug-in to view and print the files.

LEMONADE STAND - http://www.coolmath-games.com/
Players must decide how much lemonade to make, how much to charge per cup, and how much to spend on advertising. This has been around a while and is tried and true. Lots of other games on this site too.

MAD MATH MINUTES - http://www.mrsbogucki.com/aemes/resource/apps/madmath/
Gives students practice in adding, subtracting, multiplication and division facts.

MANIPULATIVES  -http://mason.gmu.edu/~mmankus/Handson/manipulatives.htm
You can print out and copy onto card stock...pattern blocks, geometry shapes, Base Ten blocks, algebra, rods, attribute Blocks and more... Share with your math teachers.

MATH ARCHIVES - http://archives.math.utk.edu/
Archives, searchable database, software, K-12 teaching materials and links.

MATH AND READING HELP FOR KIDS - http://math-and-reading-help-for-kids.org/index.html
Targeting 7th grade – this is a collection of top resources for parents and educators who work with students struggling in reading and/or math. Great to have handy when looking for resources to share
at conferences, in newsletters, and with colleagues.

MATH BLUES - http://www.mathblues.com/
Updated weekly with math news, problem-solving tips, biographies of famous mathematicians, math trivia, and more; an alternative to textbook-style math education that emphasizes problems most students find conceptually difficult.

MATH CATS - http://www.mathcats.com/contents.html
Includes interactive activities requiring a free down load of MicroWorlds Web Player, an art gallery, math games, tessellations, and other things.  Cute.

MATH CENTRAL - http://mathcentral.uregina.ca/
This site is in English and French: teacher talk, problem solving, bulletin board and resources.

MATH.COM   - http://www.math.com/
Lessons and resources for math teachers of all ages. The references are very useful, such as English-Spanish Math Translations and the Glossary of Math Terms. You can generate Algebra Worksheets online, as are test prep for the SAT, ACT and more. Some links on this site are for registered (often paying) users, but there is much a math teacher to use with his/her classes.

MATH FORUM: PRE-K LESSONS - http://mathforum.org/teachers/pre-k/lessons-individual.html
A dozen approaches to developmental Math concepts for the earliest learners; can be adapted for Kindergarten and primary grades.

MATH FOR KIDS : A MEDIEVAL ADVENTURE IN PROBLEM-SOLVING - http://tqjunior.thinkquest.org/4471/
Math and history?  This website is for you. If you like medieval history and stories about knights, that is the theme for all the problems.  So travel back in history and enjoy!

MATH GOODIES - http://www.mathgoodies.com/
A free math help site featuring interactive lessons, homework hel, worksheets and forums. Over 400 pages of activities for students, teachers and parents.  This is an award-winning site reviewed on television, radio and in major newspapers.

MATH IN DAILY LIFE - http://www.learner.org/exhibits/dailymath/
Another great site from the Annenberg Project, answers the question how do numbers affect everyday decisions?

MATH IN THE MOVIES PAGE - http://world.std.com/~reinhold/mathmovies.html
 A Guide to Major Motion Pictures with Scenes of Real Mathematics

MATHLETICS - http://oncampus.richmond.edu/academics/education/projects/webunits/math/sport.html
Scroll to Thematic Web Units and click. This is too good to pass by! Mathmatics + Athletics = Mathletics...a natural combination. One math  Application is given for baseball, basketball, bowling and football.  You never thought math was in sports? Just think about it.... Every sport uses numbers in some way, whether it's for scoring, determining averages, or figuring percentages. And when numbers are involved, it usually means math is as well.  This is part of What Good is Math (below). You will find both by scrolling down to Thematic Web Units.

MATHEMATICS OF CARTOGRAPHY - http://math.rice.edu/~lanius/pres/map/
Well-done interdisciplinary tutorial on map making - not too heavy on the graphics either; from Rice University.

MATH MAGIC - http://mathforum.org/mathmagic/
Challenges in each of four categories (k-3, 4-6, 7-9 and 10-12) to trigger each registered team to pair up with another team and engage in a problem solving dialog. Superbly done

MATHNERDS   - http://www.mathnerds.com/
FREE! This site will give hints, suggestions and explanations to help your students (or you) figure out math problems. Team members who respond to questions are generally professional mathematicians holding advanced degrees in mathematics. Important: You must read and agree with their terms and conditions before you submit a question.

MATH MINI-LESSONS - K-5 - http://youth.net/cec/cecmath/math-elem.html
A neat listing of mini lessons for the math teacher, like Multiplication Bingo.

MATHPOWER.COM  - http://www.mathpower.com/
Basic math skills are explained very clearly in student tutorials, where students explain step-by-step how to solve unequal equations, algebra word problems and factoring polynomials. Homework assignments are available, as are study and test-taking tips. There are video snippets by Professor Freedman to explain some basic concepts such as additions and subtraction of signed numbers.

MATH, PROGRAMMING, AND BEYOND - http://library.thinkquest.org/J002581/
This ThinkQuest entry combines Math and Visual Basic programming to provide an exciting outer space simulation in which participants must choose to either save themselves or their entire space fleet from impending doom. The combination of Prealgebra and programming makes for a truly interactive experience that includes tutorials, quizzes and games. This could be an ongoing challenge in your class.

MATH PUZZLES - http://www.cut-the-knot.com/
Interactive Math Miscellany and puzzles.  Just click on a topic and make a puzzle.

MATH QUILTS - http://members.aol.com/mathquilt/
The MathQuilt web page is dedicated to providing a showcase for quilters around the world who find inspiration from the colorful world of tessellations, geometry, perspective and fractals. Zoom in on the Math Quilt Gallery and your students will be in for quite a treat, as they examine geometry, perspective, topology, irrational numbers, feathered stars, fractals and tessellations and tiling (including the work of Escher). Each example is a colorful study in a Math principle. Students can even submit their own photographed designs to this site. 

MATHS IN THE FACTORY - http://www.cadburylearningzone.co.uk/maths/
TEMPORARILY OFF LINE. Chocolate and Math! Cadbury offers this fun and tasty presentation of how Math is used to make chocolate. There are five activities specifically on Math and chocolate making, as well as a section on how chocolate is made and a challenge to design a new kind of chocolate bar. To use the Teacher's Zone you'll need to register your school name and zip code, but once you've done that you can get to all kinds of support materials, lessons, downloads and much, much more.

MATH WORKSHEETS - http://themathworksite.com/
This web page will allow you to create and print math worksheets for children learning simple arithmetic (addition, subtraction, multiplication and division). If you join, you get more worksheets.

MEASUREMENT CONVERTER - http://www.convert-me.com/en/
Online calculator which can convert units of measurement for weight, capacity and volume, length, area, speed, pressure, temperature, circular measure and time. Simple to use. Ignore the flashing lights and don't by anything.

MUDD'S MATH FUN FACTS - http://www.math.hmc.edu/funfacts/
Hosted by the Math Department of California' Harvey Mudd College, Math Fun Facts offers a searchable database of all kinds of intriguing facts that connect Mathematical knowledge to all kinds of everyday applications. Like "Why an International Date Line?", "Sure Betting on Different Beliefs" and the "Ham Sandwich Theorem". Ideal for middle school math classes and above.  Great!

MULTIFLYER - http://www.gdbdp.com/multiflyer/
Multiflyer is a fun online game developed to help anyone who is learning multiplication tables. It takes place in space and even sprinkles in learning about the planets. You can play it online, or register and receive a full downloadable version as well as downloadable interactive support tools. The game lets you figure out the answers, or you can turn off the table and wing it on your own. Simple, fun diversion to help reinforce multiplication skills.

MULTIPLICATION - http://www.surfnetkids.com/multiplication.htm
Is drill and practice the only way to learn the multiplication tables?  The site offers some interesting answers.  Yes, practice is important, and you'll find several fun ways to do so online.  But perhaps having a bit of understanding is important too.  For example, if you've already memorized 6x7=42, do you still need to memorize 7x6=42?  Of course not.  Read on for more helpful multiplication hints and lots of practice drills.

MULTIPLICATION.COM  - http://www.multiplication.com/
Teach all the kids the times tables.  Designed to support a book on teaching multiplication skills, this website is full of links to online activities, classroom games, and software. Choose the section for Teachers, Parents of Students.

MULTIPLICATION: AN ADVENTURE IN NUMBER SENSE - http://www.naturalmath.com/mult/
Join in on the conversation between a student ("There are too many multiplication facts to memorize.") and a mentor ("If you want to  know the multiplication table from 1 to 10, you may want to memorize 13 facts, at most. There are very easy tricks that will let you get the rest of the facts as fast as if you remembered them.") You'll learn which thirteen facts you need to memorize, and how to recall the rest of the multiplication table using fast mental arithmetic and number sense.

MULTIPLICATION TIPS- http://mathforum.org/k12/mathtips/multiplication.tips.html
To multiply by nine on your fingers, hold up ten fingers ?  If the problem is 9 x 8 you just  put down your eighth  finger and there is your answer: 72.  If the problem is 9 x 7 just put down your seventh  finger: 63. If you are multiplying 5 times an even number, halve the number you are multiplying by and place a zero after  the number. Example: 5 x 6, half of 6 is 3, add a zero for an answer of 30.  Toss your calculator.  Learn these student-submitted tips for  calculating times five, times nine and times eleven  in your head.

NATIONAL MATH TRAIL - http://www.nationalmathtrail.org/
"The National Math Trail is an opportunity for K-12 teachers and students to discover and share the math that exists in their own environments. Students explore their communities and create one or more math problems that relate to what they find. Teachers submit the problems to the National Math Trail site, along with photos, drawings, sound recordings, videos. All submissions will be posted to the site as they are submitted." The result is an archive of geographically-related Math problems from all over the country.

NICK'S MATHEMATICAL PUZZLES - http://www.qbyte.org/puzzles/
It is a collection of puzzles ranging over geometry, probablility, number theory, algebra, calculus, and logic. Hints are provided along with the answers, fully worked solutions, and links to related mathematical topics. Many are elementary in their statement, yet challenging. New puzzles are to be added weekly.

ONLINE MATH APPLICATIONS - http://tqjunior.thinkquest.org/4116/
Here's a ThnkQuest Junior program that offers online experiences in appreciating real world Math applications. These activities are cross-curricular and cover music, science, social studies and playing the stock market. The material here is very intensive, but the design and presentation of the material is first rate andworth the effort for upper elementary and middle school students.

ONLINE MATH WORKSHEETS - http://www.onlineworksheets.org/math_worksheets.htm
K-5 Random generated worksheets.  Each time you load a page, new exercises are generated.

PEANUTS AND CRACKERJACKS - http://www.bos.frb.org/peanuts/leadpgs/intro.htm
This Federal Reserve Bank of Boston presents a look at the economics of professional team sports through this fun site. There's a baseball simulation that tests student knowledge of economics and trivia, and a sports page section that covers all the fundamentals of economics. The teacher section has approximately fifty activities and lesson ideas in .pdf format, and they are all correlated to state standards.  You play on-line.

PLANE MATH - http://www.planemath.com/activities/pmactivitiesall.html
Plane Math contains three different levels of problem solving activities on topics like elapsed time, capacity, measurement, budgeting money and design engineering - great for middle grades. Pioneer Plane and Plane Math Enterprises require Shockwave and are simulations of real world problem solving applications.

RULES FOR FRACTIONS - http://www.gomath.com/
For visual learners who can read an algebraic formula, this is the site.  In one straightforward table, you'll learn the rules for adding (A/B + C/B = (A + C)/B), subtracting, dividing and multiplying fractions. This is also the page for parents who need just a bit of a refresher before tackling fourth grade fractions.

THE SCHOOL ATHLETICS CENTER - http://www.edgate.com/school_athletics/student/sporting_articles/
Play Ball! Teachable Science and Math Ideas about Baseball Educators, take a look at these sites to learn how you can use baseball to teach science and math. Students, check out these cool, sports-related activities.

SYMMETRY AND PATTERN: THE ART OF ORIENTAL CARPETS - http://mathforum.org/geometry/rugs/index.html
The study of symmetry offers one approach to analyzing patterns in Oriental carpets. Through symmetry analysis we may identify areas of pattern that exhibit expected repetitions, and areas that vary from that expectation.

TESSELLATING ANIMATION - http://www.k4.dion.ne.jp/~mnaka/home.index.htmll
Japanese artist Makoto Nakamura awesome animations; his tessellated birds fly, his tessellated fish swim, and his tessellated dancers dance.  Visit Nakamura's Jigsaw Puzzles (link at the bottom of the page.)  Here you will have a chance to reassemble tessellated cats, pigeons, gorillas and more.  Each interactive puzzle is unique and intriguing in its own way. Having trouble? Click the pieces to rotate them.

TESSELLATION TOOL - http://www.boxermath.com/plp/modules/online/workshop/toolbox/mosaictool.html
Are you eager to create your own patterns? Take a look at this cool tool.  Start by dragging a shape onto the white board.  Next, you rotate or color your shape, and repeat as needed.  All of the polygons have sides of equal length, so they fit together perfectly.  Two more sites with interactive design tools are Pattern Blocks http://www.arcytech.org/java/patterns/patterns_j.shtml 

THINK QUEST STOCK GAME - INVESTING FOR KIDS - http://library.thinkquest.org/3096/61game.htm
Use real Wall Street quotes to invest and develop a hypothetical portfolio. TEMPORARILY UNAVAILABLE.

THINKS.COM - http://thinks.com/
Puzzles, games and lots of materials to promote problem solving strategies
THRILLS AND CHILLS WITHOUT THE SPILLS -ROLLERCOASTER PHYSICS FOR MIDDLE SCHOOL - http://www.angelfire.com/on2/thrillsandchills/
At this site create your dream roller coaster ride and test it in a  virtual amusement park. Explore physics and math through a roller coaster design competition by building a working scale model. Compete  on-line with other middle-school students. Also included is a scavenger hunt covering many different facts about roller coasters.
 

TOTALLY TESSELLATED - http://library.thinkquest.org/16661/
History, essential, mosaics, tilings, Escher, and "Beyond" - another nice site on these visual pattern puzzles

A WALK THROUGH TIME - http://physics.nist.gov/GenInt/Time/time.html
Department of Commerce Publication covers Ancient Calendars, Early Clocks, Timekeeping, The "Atomic Age" and World Time Scales.

WEBMATH - http://www.webmath.com/
An internet based math problem solver, equipped with an online "math-engine" that can instantly provide you with an answer to the particular math problem you may be working on.  Just pick the type of math problem you are working on and you're off.

WELCOME TO MONEY CENTRAL STATION (US BUREAU OF ENGRAVING AND PRINTING) - http://www.moneyfactory.com/kids/start.html
Bright, colorful, noisy games from the US Bureau of Engraving and Printing. Divided into two sections, 5-8 year olds and 9-13 year olds, each section contains 4 games that test players knowledge about money. The 9-13 section also has information on each denomition of paper money. Not informative enough to provide a full lesson; but useful as a culminating activity or special treat.

WORD PROBLEMS FOR KIDS - http://www.stfx.ca/special/mathproblems/welcome.html
Actual word problems online for grades Five through Twelve, for teachers and students.  The problems are classified into grade levels and are meant to improve skills, not test them.  Interesting source!

YE OLD COMPASS ROSE - http://academic.brooklyn.cuny.edu/geology/leveson/core/linksa/comp.html
Here is a great opportunity to integrate your study of circles in geometry with your study on cartography. This site walks students through the math of circles and the corresponding azimuths used in cartography.

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Last Updated August, 2007