Offers free math lessons and homework help, with an emphasis on geometry, algebra, statistics, and calculus. Also provides calculators and games.

Virtual exhibit looks at the ways people use math every day, from cooking to planning for retirement.

An online mathematical high school. Arithmetic, algebra, geometry, trigonometry, functions and graphs, analysis. Theory and solving problems. Also has practice exams and math jokes.

Explains the role of math in investing, music, history, science, and travel. Includes stock simulation game.

Articles, discussion groups, and news that aim to show high school students the fun, creative side of math. Also provides SAT tips and homework help resources. Encourages submission of writing and artwork by students.

Features interactive math lessons, homework help, worksheets, puzzles, message boards, and newsletters.

Helps students improve their math skills interactively with flashcards and games. Also provides worksheets and homework help.

Explains the unusual concept of partial dimensions and shows comparisons to a dot, line, plane and cube.

Explains the properties of fractal graphic images that can be created with special formulas. Also, introduces chaos theory and infinity. Offers free online help.

Features free flashcards, a magic square game, biographies of mathematicians, and other resources.

Interactive activities and quizzes in basic arithmetic, algebra, and trigonometry. Also includes brain teasers and puzzles.

Calculators for a variety of subjects, including measurement conversion, interest, distance, time zones, and currency.

Interactive lessons and exercises, open-ended questions, printable worksheets, and challenging problems sorted by topic and grade range.

Math games, problems, calculators, puzzles, and fun and for all levels.

Activity site involving multiplication and calculator work. The answers are coordinates which can be joined in sequence to generate simple pictures.

Features printable worksheets for students to practice with.

A large collection of interactive worksheets that allows kids to practice basic math skills.

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.

Collection of exercises and puzzles for all ages and abilities.

This site has been created so that students can have fun and practice math. Includes lessons in addition, subtraction, multiplication, geometry.

Math problems that tell a story about a frog named Ribbit. For K-8.

Ask Dr. Math questions, or try your hand at the weekly puzzlers.

An animated, interactive math dictionary defining common math terms and concepts. [Requires Flash 5]

Free downloadable flash card game for children aimed at improving their mathematics skills with lessons aimed at various age groups.

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.

Monthly publication offering math help, list of competitions, and links.

Learn about numbers, measurement, money, tables and formulas. Includes conversion calculator, games and quizzes.

A collection of educational math games and lessons for pre-algebra, algebra, and geometry. Includes practice problems and drills, a math dictionary, and a humor section.

Interactive worksheets and quizzes in basic math, pre-algebra, algebra, geometry, and statistics. Find calculators to compute interest and conversion tools for currency, area, temperature, and other units of measurement. Also runs a weekly math contest.

Interactive Director movie comparing a fugue by Johann Sebastian Bach to a fractal.

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.

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.

Animated and illustrated definitions of math terms for elementary school students. Organized by grade level and alphabetically. [Requires Flash]

Includes lessons, games, puzzles, and offline activities.

Have fun solving problems concerning rates, measurements, shapes, money, fractions and time. Page includes hints and solutions.

Covers concepts that are used in algebra and geometry, as well as an overview of calculus terms. Includes explanations on how to use the number line, working with formulas, fractions, square roots, graphs, parallel lines, triangles and areas. Also has a message board and short quizzes.

A collection of free Java-based measurements converters, calculators, and unit translators.

Online exercises through which children can explore and examine math concepts while at home.

Offers games on counting, telling time, making change, measurement, and shapes.

Provides information on the kinds of jobs available for kids interested in math.

Learn basic concepts behind arithmetic, algebra and geometry. Includes some SAT test preparation help and math trivia.