Math (or mathematics) is the study of numbers, or variables representing numbers, and the way they can be used to solve everyday problems, and learn about the world around us.
Some applications of math are in the areas of money, physics, computer programming, fractal music and geometric art.
An animated, interactive math dictionary defining common math terms and concepts. [Requires Flash 5]
Helps students improve their math skills interactively with flashcards and games. Also provides worksheets and homework help.
An online mathematical high school. Arithmetic, algebra, geometry, trigonometry, functions and graphs, analysis. Theory and solving problems. Also has practice exams and math jokes.
Features free flashcards, a magic square game, biographies of mathematicians, and other resources.
Offers tutorials on a variety of math topics including subsets, permutations, and Fibonacci sequences.
Offers games on counting, telling time, making change, measurement, and shapes.
A collection of free Java-based measurements converters, calculators, and unit translators.
Calculators for a variety of subjects, including measurement conversion, interest, distance, time zones, and currency.
Explains the unusual concept of partial dimensions and shows comparisons to a dot, line, plane and cube.
Interactive lessons and exercises, open-ended questions, printable worksheets, and challenging problems sorted by topic and grade range.
Learn about numbers, measurement, money, tables and formulas. Includes conversion calculator, games and quizzes.
Interactive Director movie comparing a fugue by Johann Sebastian Bach to a fractal.
Provides detailed descriptions of all the common subjects, concepts, and theorems, with examples and graphics to help explain the material.
Animated and illustrated definitions of math terms for elementary school students. Organized by grade level and alphabetically. [Requires Flash]
Online exercises through which children can explore and examine math concepts while at home.
Features opinion polls, study tips, online math games, word problems, glossary, and interactive puzzles. Includes different sections for levels from kindergarten through the sixth grade.
Learn how to work with fractions and decimals, solve word problems, find the basic units of measurements, or do basic operations in trigonometry.
Ask Dr. Math questions, or try your hand at the weekly puzzlers.
Features interactive math lessons, homework help, worksheets, puzzles, message boards, and newsletters.
Interactive activities and quizzes in basic arithmetic, algebra, and trigonometry. Also includes brain teasers and puzzles.
Virtual exhibit looks at the ways people use math every day, from cooking to planning for retirement.
Features printable worksheets for students to practice with.
Offers free math lessons and homework help, with an emphasis on geometry, algebra, statistics, and calculus. Also provides calculators and games.
A selection of common mistakes made by students in algebra, trigonometry and calculus.
Includes lessons, games, puzzles, and offline activities.
This site has been created so that students can have fun and practice math. Includes lessons in addition, subtraction, multiplication, geometry.
Interactive exhibits include polygon dissection and stick sorting.
Tips for solving word problems for K-5th graders.
Learn how to use expressions to represent numbers, work with variables and create special drawings to represent equations. Also has a brief introduction to trigonometry and curve fitting. Includes interactive graphs.
Use this tool to find answers to math-related problems.
Learn basic concepts behind arithmetic, algebra and geometry. Includes some SAT test preparation help and math trivia.
Produced by Charles and Ray Eames, the video "Powers of Ten" has been converted into web images. Explores over 42 powers of ten in a series of images, beginning with a photo of someone lying on the grass. Shows the scale of the universe and atoms.
Introduces the abacus, relates its history, and shows how to perform basic mathematical operations on it. Also answers questions about the ancient tool and shows how to build one with Legos.
Features a collection of math games, forum, and a list of jobs that need math.
Thanks to DMOZ, which built a great web directory for nearly two decades and freely shared it with the web. About us