"BLOSSOMS video lessons are enriching students' learning experiences in high school classrooms from Brooklyn to Beirut to Bangalore. Our Video Library contains over 100 math and science lessons, all freely available to teachers as streaming video and Internet downloads and as DVDs and videotapes."
Catch Up Math provides a variety of free games for practicing math skills.
"Critical Foundations for Algebra is a multimedia presentation of essential concepts, recommended practices, and planning templates from the National Math Panel. (Department of Education)."
The West Texas A&M Virtual Math Lab covers College Algebra, Intermediate Algebra, Beginning Algebra, and Texas Academic Skills Program (TASP) Test Preparation.  The tutorials were created as a service to anyone who needs help in these areas of mathematics. First time users are encouraged to review the Guides for each tutorial to learn how they are set up.
My Algebra will assist you with most of your Algebra questions.  However, if you want to see the work steps, the site will direct you to software that you can purchase.
The National Library of Virtual Manipulatives offers math manipulatives that are easily accessed by category and grade.
Kenneth Brunner "designed this site to help students understand mathematics through visual manipulatives. This site is a valuable resource for parents and teachers as well to use with young learners."  It is worth a few minutes to browse this site and see what it has to offer.
Math Thesaurus - This link provides access to a wide variety of math illustrations in Flash form.
Mathflix contains instructional math movies.
Webmath is a great site for applets, explanations, and other math resources.
Math in Movies is a collection of movie clips that make reference to math. 
NASA provides a website with weekly math problems.
The Futures Channel:  Connecting Learning to the Real World
Mathematical Interactivities is a good source for math games and activities.
Math in Daily Life:  "If we are well versed in this language of numbers, it can help us make important decisions and perform everyday tasks. Math can help us to shop wisely, buy the right insurance, remodel a home within a budget, understand population growth, or even bet on the horse with the best chance of winning the race."
"The Shodor Foundation is a non-profit research and education organization dedicated to the advancement of science and math education, specifically through the use of modeling and simulation technologies."  This site has excellent lesson plans with interactive web tools, such as a linear equations calculator.

Calculus on the Web "offers an interactive environment for learning, practicing, and experimenting with the ideas and techniques of calculus."

Figure This!  Math Challenges for families and middle school classrooms.  You can access these online, download PDFs, or order the CD.
"Seeing Math has developed a series of interactive software that clarify key mathematical ideas for teachers and students of algebra."  This is an EXCELLENT site for math applets for Algebra I.
Monica's Math - PowerPoint presentations for math.
Cut the Knot contains Geometry applets that correspond to different geometry puzzles and geometry properties.
SAT Math Pro allows you to prepare for the SAT test online, for free!  Check it out.
Math Flash Cards!  Just one of the many things offered at
The Math Forum at Drexel University:  "Welcome to the Teachers' Place! Here you'll find what we consider to be the best resources for teaching math at all levels."
"The TSUS MELL project is focused on translating research into practical products designed to improve the teaching of mathematics to English language learning students."
"Welcome to the Texas Mathematics and Science Diagnostic Assessment (TMSDS)"  You must have a district subscription for this free service.  It covers grades 3-8.
"'Mathematics Across the Curriculum' features an "electronic bookshelf" of materials for teaching math in art, history, literature, & music, as well as science, engineering, & other disciplines traditionally associated with math."
"Classroom Compass - a collection of ideas, activities, and resources, for teachers interested in improving instruction in science and mathematics."

Free High Precision Complex Calculator

Quick Math - Automatic Math Solutions

Welcome to! This web site was developed to help students improve their math skills interactively.
Illuminations, a site created by NCTM, contains lesson plans, applets and tools for math teachers.
"Mathematics Benchmark Performance Assessments are designed to assess student mastery as a result of TEKS-based instruction and serve as an indicator for student success on TAKS. A master rubric to analyze a student's conceptual knowledge, procedural knowledge, and communication skills is included.  The assessments are a free resource to educators, parents, and students. Over 120 tasks per grade level or subject are disseminated either in the public site or a separate site for administrators. "
Create a Graph allows students to create four kinds of different graphs.