For people from ages 13 to 100! The main goal of this site is to provide resources for teaching math and making it fun for all. Check out the sections on fractions and geometry.
Flashcards for Kids.
Add, subtract, multiply, or divide. Pick easy or complex numbers. Work with the timer on or off. Some kids say it makes practicing math fun.
"Dedicated to making it easier for students to understand and work with Euclidean Geometry." This site includes problems, quizzes, SAT math, and many animated examples.
A not-for-profit organization with the mission of providing a high quality education to anyone, anywhere. They have 1000+ videos covering everything from basic arithmetic and algebra to differential equations, physics, chemistry, biology and finance. They also cover the SAT test in great detail:
Includes all aspects of Junior High/High School mathematics through Algebra II. It has lessons with multiple choice questions. Explanations are available for all questions.
An online encyclopedia of mathematics.
A Maths Dictionary for Kids.
Explains over 400 common math terms in simple language.
Offers online math games that teach Multiplication, Subtraction, Addition, Division and more.
A step-by-step calculator that explains parentheses, exponents, multiplication, division, addition, and subtraction. As you type in the problem, it gives you the answer.
General math, algebra, graphs, plots, geometrical stuff, trigonometry and calculus.
Lessons in the basic concepts of geometry, trigonometry, and physics. Created by a high school math and physics teacher for high school students.
the Homework Page