Exchange Rates
http://finance.yahoo.com/m3?u

Dave's Math Tables
http://www.sisweb.com/math/tables.htm
Algebraic functions, geometry, calculus, and general math equations and formulas and conversion tables.

The MacTutor History of Mathematics archive
http://www-groups.dcs.st-and.ac.uk/~history/
a group of biographies of over 1000 mathematicians searchable by name, historical period, and country of origin

Elementary Math

APlus Math
http://www.aplusmath.com
create flash cards, online math games, create your own worksheets

ADDING AND SUBTRACTING FRACTIONS:
http://www.orchardproject.org/adding_and_subtracting_fractions.htm
Find 10 word problems for students to learn and practice adding and subtracting fractions.

Multiplication/Division
http://kidsmath.about.com/kids/kidsmath/cs/multiplydivide/index.htm
Learn all about multiplying and dividing with flashcards, worksheets, sample problems and more. 

Primary Sites For Math
http://www.pbs.org/teachersource/math.htm 

Prime Numbers
http://www.utm.edu/research/primes/

FRACTION CONVERSION BINGO:
http://www.col-ed.org/cur/math/math52.txt
Adapt this activity to your particular grade and ability level.

ALL ABOUT RATIOS:
http://math.rice.edu/~lanius/proportions/
Try these creative, online exercises for teaching or reinforcing your skills in ratios. A quiz follows the exercises.

UNDERSTANDING PERCENT:
http://www.iit.edu/~smile/ma9510.html
Suggested activities in real world scenarios help students understand how percentages work.

PERCENTAGE LESSON:
http://explorer.scrtec.org/explorer/explorer-db/html/813447484-81ED7D49.html

Algebra

Ask Dr. Math: Middle School Algebra
http://mathforum.org/dr.math/tocs/algebra.middle.html

Ask Dr. Math: High School Algebra
http://forum.swarthmore.edu/dr.math/tocs/algebra.high.html

Basic Algebra Number Tricks 
http://forum.swarthmore.edu/briston/briston.tricks.html

Basic Algebra Percent markdown 
http://forum.swarthmore.edu/briston/briston.markdown.html

Beat the Calculator-Mental Math skills 
http://www.BeatTheCalculator.com/

On-line Algebra lessons 
http://www.algebrahelp.com/

Math in Daily Life
http://www.learner.org/exhibits/dailymath/
Most students question how they will use basic math concepts throughout their lives. This site explains how math impacts daily decision making as it explores math's role in cooking, home decorating, savings and retirement, and more. 

Zona Land 
http://id.mind.net/~zona/
Created by high school math and physics teacher Ed Zobel, Zona Land provides resources for students to fully grasp major concepts in Algebra, Geometry, and Physics. 

Word Problems for Kids
http://www.stfx.ca/special/mathproblems/welcome.html
This site contains word problems specifically designed for grade 5-12 students. Choose from a set of carefully selected problems which can help improve problem-solving skills. Hints are available to students and complete solutions are available to teachers with e-mail addresses upon request

Online Algebra Tutorial 
http://math.about.com/cs/algebra/index.htm
While this purports to be just for College Algebra students, many of the lessons are very appropriate for the high school setting. 

Math Games

TANGRAM UNIT:
http://mathforum.org/trscavo/tangrams/
Your class will first create their own set of tangrams in this web unit for grades 4 through 6, and follow up by computing the areas of polygons while learning the geometric concepts of congruency and similarity.

WHO WANTS PIZZA?
http://math.rice.edu/~lanius/fractions/index.html
These interactive lesson plans reinforce fraction skills in equivalent fractions, addition, and multiplication. Concepts are reinforced by a step process and practice questions. Teacher notes are included.

ALL ABOUT MULTIPLICATION:
http://www.aaamath.com/mul.html
Use these multiplication exercises for skill practices, or for students who may be having problems getting their  multiplication facts down and might require an alternate learning style. Explanations of processes are followed by interactive practices, which in turn are followed by challenge quizzes. Several skill levels and topics are included.

Math Warm-ups
http://7-12educators.about.com/blwarmmath.htmDaily warm ups or do nows are tools that every teacher should have in their educational arsenal. Warm ups can be given to students at the beginning of the period to review a previous topic or to introduce new material. 

Math Goodies
http://www.mathgoodies.com

Math Journey
http://www.quia.com/mathjourney.html

Ask Dr. Math 
http://mathforum.org/dr.math/dr-math.html

The Mathman 
http://www.shout.net/~mathman

The Geometry Center 
http://www.geom.umn.edu

The Chance Database 
http://www.dartmouth.edu/~chance/

Fibonacci Numbers and the Golden Section 
http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fib.html

Mathstories.com 
http://www.mathstories.com/

Math Worksheet Generator 
http://www.mathgen.com/free.htm

Math Worksheet (Coastlink) - gives you randomly generated math worksheets. 
TheMathWorkSite.com

SuperKids - Math worksheet Generator 
http://www.superkids.com/aweb/tools/math/index.shtml

FLASHCARD GENERATOR! 
http://www.aplusmath.com/Flashcards/Flashcard_Creator.html

CLOCKS -- TEACHING TIME:
http://www.fi.edu/qa00/attic3/index.html

Jumpin' Jehosaphat:  The Counting Sheep (K+)
www.dodds1.com/Java/Jj.html

Money

EXACT CHANGE PLEASE:
http://www.elm.maine.edu/assessments/change8/index.stm
Students will imitate grocery store shopping with empty food boxes, play money and coins, and a cash register (you can improvise and make your own if you don't have the learning variety, even using a shoebox) to practice money addition and substraction. This activity is very appealing to children, especially if they all get a chance at buying and selling, as well as supplying the empty boxes for the store contents.

Geographical Directory of World Paper Money
http://aes.iupui.edu/rwise/notedir/mappage.html
Over 2000 images of scanned paper money

The Wheel Deal New
http://csis.pace.edu/schools/rn/dsaraceno/dsauto.htm
An activity that takes students through the purchase of a car, new or used. Also, taking into consideration the cost of insurance, invaluable for students and adults alike. 

Workplace Math Skills New
http://www.readiowa.org/workplacemath/contents.html
Teach your students the math skill necessary to survive in the workplace with this great site. 

Consumer Math Auto Project 
http://www.quan-hs.odedodea.edu/qhs/classrm/conmath.htm
A great activity centered around the buying of a new car. Students will compare car prices, styles, and safety in choosing a vehicle. 

MONEY EXPERIENCE FOR KIDS:
http://www.edu4kids.com/money/
Three online games will teach students how to make change, how to plan spending with the available money, and add money totals. Level of difficulty can be adjusted.

Advanced

The Fibonacci numbers and the Golden Section
Grade: 7 - Post-secondary
http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fib.html
Come take a closer look at the Fibonacci numbers, their properties and occurrences in nature, and related number theory topics. Packed with information, this site offers examples of the Fibonacci numbers in art, architecture, and music, as well as information on the Golden Ratio and its uses in geometry.

The Integrator
www.integrals.com

Inverse Symbolic Calculator
www.cecm.sfu.ca/projects/ISC/

Linear Regression Graph Pad
yip5.chem.wfu.edu/yip/spectspy/specmain.html

Physical Constants and Astronomical Data
www.astro.wisc.edu/~dolan/constants.html

Pocket Calculator for Physics
www.physique.fundp.ac.be/Comp/PhysComp.html

Scientific Calculator
www.squarebox.co.uk/desktop/

Geometry

INTERACTIVE GEOMETRY CENTER:
http://www.ScienceU.com/geometry/

Help with Proofs
http://forum.swarthmore.edu/dr.math/faq/faq.proof.html

A Great Geometry WebSite
http://tqd.advanced.org/2647/geometry/glossary.htm

Geometry Resources
http://www.geom.umn.edu

The History of Geometry
http://math.rice.edu/~lanius/Geom/his.html

The Geometry Center
http://www.geom.umn.edu
This extensive site is updated regularly and contains useful material for teachers at almost any level. There are interactive math resources, some good Java applications, plenty of software to download, and more. 

Zona Land 
http://id.mind.net/~zona/
Created by high school math and physics teacher Ed Zobel, Zona Land provides resources for students to fully grasp major concepts in Algebra, Geometry, and Physics.

A Fractals Unit for Elementary and Middle School Students
http://math.rice.edu/~lanius/frac/
"They're everywhere, those bright, weird, beautiful shapes called fractals." Use this fractals site to help your students understand what these fascinating pictures are all about. 

Geometry Forum - Problem of the Week
http://forum.swarthmore.edu/geopow/
The Problem of the Week (POW) is a regular feature of the Geometry Forum, and provides students an opportunity to answer questions and receive feedback and recognition from the Forum staff. 

Rainbow Lab
http://www.geom.umn.edu/education/calc-init/rainbow/
How are rainbows formed? The University of Minnesota's Calculus Initiative has the inside scoop. Here your students will learn about reflection, refraction and how light travels. They will be able to calculate the path of a beam of light through a water droplet and predict the best viewing angle for observing the resulting rainbow. 

Gallery of Interactive Geometry
http://www.geom.umn.edu/apps/gallery.html
This site hosts a series of interactive geometry activities from the Geometry center. 

Interactive Mathematics Online
http://tqd.advanced.org/2647/main.htm
At this site, mathematical ideas are explained clearly, with examples. From the main page, you can choose geometry, algebra, chaos, and trigonometry. 

Totally Tessellated
http://library.advanced.org/16661/

Calculus

Visual Calculus
http://archives.math.utk.edu/visual.calculus
Visual Calculus describes how technology can be used in the teaching of calculus. The site includes detailed information about implementation with a variety of software packages, interactive modules, and drill problems. 

Rainbow Lab
http://www.geom.umn.edu/education/calc-init/rainbow/
How are rainbows formed? The University of Minnesota's Calculus Initiative has the inside scoop. Here your students will learn about reflection, refraction and how light travels. They will be able to calculate the path of a beam of light through a water droplet and predict the best viewing angle for observing the resulting rainbow.

Trigonometry

Activities in Math : Trigonometry
http://www.syvum.com/math/trigonometry.html

An introduction to TRIGONOMETRY
http://www.ping.be/~ping1339/gonio.htm

Mathematics Archives - Topics in Mathematics - Trigonometry
http://archives.math.utk.edu/topics/trigonometry.html

Trigonometry Contents Page
http://library.thinkquest.org/10030/trigcon.htm

Frequently Asked Questions About Trigonometry
http://catcode.com/trig/index.html

Statistics & Probability

Statistics
http://www.learner.org/exhibits/statistics
With the winning combination of statistics and politics, this Annenberg/CPB Website offers an original, educational, and entertaining online experience. Visitors follow a fictional race between two candidates by reading news bulletins, then learn basic statistical concepts in a real-world context. Find the out what a random sample really is, what "margin of error" means, and why polls aren't always right. 

VassarStats: Website for Statistical Computation
http://faculty.vassar.edu/~lowry/VassarStats.html
If you are taking a statistics course, or integrating statistics into your class, this is a gold mine. Learn about probabilities, such as "Randomness and the Appearance of Pattern." Perform a "Randon-sample t-test" and dazzle your friends and professors.

Measurement

Measurement, Perimeter, and Area
http://142.3.219.38/RR/database/RR.09.96/brososky1.html
Activities are described for grades 7-9. Materials are usually very accessible, and the lessons are easily completed.

Kids' Almanac--Standard Measurement in Sports
http://kids.infoplease.lycos.com/ipka/A0113430.html
Grades 3-8. These measurements for the different sports--for example, the size of a basketball court, the circumference of a bowling ball, or the weight of a baseball--could be used in problem-solving activities created by the teacher or student.

Measure It!
http://www.funbrain.com/measure/index.html
Grades 3-5. Seven different variations of this game are presented for the student. In each case, the student measures different items in inches or centimeters.

Hands-On Math Activities for Grades 4-6
http://142.3.219.38/RR/database/RR.09.99/sawatzky1/
Grades 4-6. This site provides six lesson plans on different facets of measurement. Worksheets are needed, they are provided on the site.

Pi Mathematics
http://www.ncsa.uiuc.edu/edu/RSE/RSEorange/buttons.html
Grades 6-8. This site is a great introduction to the concept of pi. It provides activities, history, a video, a project, and the problems that require the use of pi.

Mrs. Glosser's Math Goodies--Lesson on Circumference of a Circle.
http://www.mathgoodies.com/lessons/vol2/circumference.html
Grades 6-8. Basic information on pi, circles, and formulas is given. The student can then apply this knowledge to some basic questions. This site will link you to other sites that contain puzzles, lessons on area, worksheets, and challenge exercises.

Fractions

WHO WANTS PIZZA?
http://math.rice.edu/~lanius/fractions/index.html
These interactive lesson plans reinforce fraction skills in equivalent fractions, addition, and multiplication. Concepts are reinforced by a step process and practice questions. Teacher notes are included.

 

Excel Uses in the Classroom