Mathmania. This site is dedicated to Graph Theory, Knot Theory, Sorting Networks and Finite State Machines. This site is for students and teachers.
http://csr.uvic.ca/~mmania/
Maths Archives. This site is a database that contains Topics in Mathematics, Computer Software, Teaching material (such as Graphing calculators, Visual Calculus) and links to other Maths related sites.
http://archives.math.utk.edu/
Mega-Mathematics. The Mega-Math project is to show unusual maths ideas to young students and their teachers. It gives a variety of interesting problems. If you want the page to load up faster, click on the text menu option.
http://www.c3.lanl.gov/mega-math/
21st Century Problem Solving. This web page gives word prolems for students, gives teachers strategies on how to make full use of problem solving in their lessons.
http://www.suremath.com/suremath/suremath/home.html
MathsDEN (Digital Education Network). This site is in Canada but ti gives students the opportunutity to work through questions . All questions are multiple choice. The student can progress throuhg the questions at their own rate. Students results are kept in a database. The site contains general maths questions, maths challenges and tips for teachers as well. You must register if you are entering MathsDEN for the first time. Fill in the details and you then have full access to the site.
http://www.actden.com/
W.A. Education Site (Maths Resources). A site that contains many mathematical sites. It is updated by Murdoch University.
http://www.dse.vic.gov.au/resmath.htm
Ask Dr Math. This site is a question and answer site for K-12 maths students and teachers. There is a searchable archive by level and topic along with FAQ
http://forum.swarthmore.edu/dr.math/abt.drmath.html
21st Century Problem Solving. A site that teaches problem solving strategies in algebra, physics and other areas.
http://www2.hawaii.edu/suremath/home.html
Brain Teasers. This site gives a weekly posting of Brain Teasers for years 3 to 8. The solutions, strategies and hints are given to all problems. There is also an archive of all previous problems with their solutions.
http://www.eduplace.com/math/brain/index.html
MathMagic. A site that in El Paso, Texas. It is a telecommunication project that allows students to solve problems along with another team somewhere else in the world. All communications are by Email. Once both the teams agree on a solution, they can post it to have it marked. It allows students to solve problems as well as being able to communicate with others around the world.
http://forum.swarthmore.edu/mathmagic/index.html.
Maths Problem Solving Task Centres. An Australian site that has been designed to help students and teachers in problem solving and those who use Task Centres.
http://www.srl.rmit.edu.au/mav/PSTC/
The Geometry Forum Problem of the Week. The site allows students to solve a problem of the week. They gain feedback and recognition from the Forum staff.
http://forum.swarthmore.edu/geopow/
The Geometry Forum Problem of the Month. This site is run by the same group above.
http://forum.swarthmore.edu/pom2/
Puzzle Archives. This site contains puzzles and brain teasrers that are archived from the newsgroup rec.puzzles and categorised by subject. Solutions are given to the puzzles.
http://alabanza.com/kabacoff/Inter-Links/puzzles.html
Maths Forum Internet Resource Collection-Outline Version. This site is made up of links to other sites on the Internet. It has been put together to make it easy for maths students and teachers to find resources.
http://forum.swarthmore.edu/~steve/steve/mathpuzzles.html
Selected Maths Resources by Subject. This site is a collection of maths resources put into year groups and categories. Well worth a look.
http://forum.swarthmore.edu/math.topics.html
The Maths Forum Student Centre. An excellent site where there are plenty of resources for the student all placed in the one site.
http://forum.swarthmore.edu/students/
Houghton Mifflin Project Centre. A project centre where you can find or share collaborative classroom projects for use over the Internet.
http://www.eduplace.com/projects/index.html
Ken Duisenberg's Puzzle of the Week. A site maintained by a person who is an avid logic-puzzle enthusiast and is particularly fond of geometry and maths puzzles.
http://www.ecst.csuchico.edu/~kend/potw/index.html