The following sites include puzzle pages, resource sites for teachers, mathematical organisations, tricks and cartoons, fact pages, mathematical encyclopaedias – in fact anything that a mathematician, young or old, will find interesting!
Links are listed alphabetically.

Abacus The Art of Teaching With Beads — Lots of information on the abacus.

Association of Teachers of Mathematics — The official home page of the Association of Teachers of Mathematics.

BEATCALC: Beat the Calculator — A collection of over 150 tricks for quick calculating.

Black Douglas — Professional support in mathematics education for elementary and high school teachers and teacher trainers.

Brain Teasers — Whether you solve them at home or in the classroom, individually or as a group, you’ll find our Brain Teasers both entertaining and mentally challenging. Each Wednesday evening there is one new Brain Teaser at each of three grade ranges. Solutions are posted on the following Wednesday.

Centre for Innovation in Mathematics Teaching –The Centre, established in 1986, is a focus for research and curriculum development in Mathematics teaching and learning with the Professional support in mathematics education for elementary and high school teachers and teacher trainers.

David Bailey’s World of EscherLike Tesselations — David Bailey from Grimsby, England, who has a keen interest in recreational mathematics, of a mostly geometrical nature, and more specifically of Escherlike tessellations along with their application to polyhedra.
 eMATH Home Page — The web site of the American Mathematical Society. There is news about mathematics, AMS publications, careers for mathematicians etc.
 Edinburgh Mathematical Society — This is the education page of the Edinburgh Mathematical Society. It includes details of the EMS’s Schools Enrichment Fund.
 Erich’s packing center — A huge collection of problems packing one type of geometrical figure inside another.
 Exploratorium — The Exploratorium is a USA based collection of educational resources (instructional software, lab activities, lesson plans, student created materials …) for school mathematics and science education. You can browse through mathematics and science education curricula or conduct searches that focus on specific interests. Many resources are available in the Adobe Acrobat format that is readable by Macintosh, Windows and other OSs.

Fibonacci Numbers and Nature — This page has two parts. The first looks at the Fibonacci numbers and why they appear in various “family trees” and patterns of spirals of leaves and seeds. The second examines why the golden section is used by nature in some detail, including animations of growing plants.

Fractals in Science — The Center for Polymer Studies has developed a number of handson activities, laboratory experiments, and interactive visualisation programs. These activities encourage students to explore how fundamentally random microscopic events can give rise to fractal macroscopic patterns.
 Funbrain — This site has quizzes and activities for children at four levels of difficulty. There are sections on numbers, words and the world. There is also Quiz Lab, a resource which allows teachers to create quizzes for their pupils.
 GCSE Answers — GCSE Answers is where you’ll find answers to many problems with GCSE Mathematics.
 GeoGebra — GeoGebra is dynamic mathematics software for all levels of education that joins arithmetic, geometry, algebra and calculus. It offers multiple representations of objects in its graphics, algebra, and spreadsheet views that are all dynamically linked.
 Geometry Junkyard — These pages contain usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry. It is both serious and entertaining. There also a page on recreational mathematics.

Geometry, step by step from the land of the Incas— A beautiful geometry resource with colour, motion and music

Guide to mathematics resources — A list of mathematical Web pages (mostly relating to mathematical software) and newsgroups where mathematics is discussed.

History of Mathematics – University of St Andrews MacTutor Archive — An extensive collection of information on the history of mathematics, with the biographies of around 1300 mathematicians, articles on the history of mathematical topics, birthplace maps, pictures of the mathematicians, interactive famous curves, and much much more.

Interactive Mathematics Miscellany and Puzzles — A great collection of mathematics problems and puzzles. Learning starts from wondering, and a purpose of this site is to serve as a resource for things, simple but curious, related to mathematics.
 Knot a Braid of Links — This is a great source of links to other mathematical sites.
 Logotron Educational Software — A catalogue of educational software with some demo versions to download.

Magic Squares, Magic Stars & Other Patterns — Pages on magic squares, magic stars (a lot of original material) and miscellaneous number patterns. This site should be of interest to middle and high school students and teachers, and anyone interested in recreational mathematics.

Math Forum –The Math Forum is an NSFfunded project whose aim is to foster a community of teachers and pupils with an interest in mathematics. There are Discussion Groups, the Forum Showcase, an Internet Newsletter, Problems of the Week, Teacher2Teacher etc.
 Mathematical Association — Official home page.

Mathematical Association of America Online— The site of the Mathematical Association of America. There is news about mathematics, and some articles.

Mathematics and Knots — An Exhibition presented by the School of Mathematics of the University of Wales, Bangor. A visit to this site opens a door to a new world and beautifully illustrates how mathematics may be used to explore and understand the seemingly commonplace knot.
 Mathematics WWW Virtual Library — An extensive collection of mathematical links, including, mathematics education information, electronic journals, mathematics newsgroups and mathematical software.
 Maths Careers — Advice compiled by the UK Council for Mathematical Sciences. Categorised by age, with features and posters.

Maths Online — Multimedia learning units on mathematical subjects for secondary school, high school, college, and university.
 Mathsroom — Michael Aitchison’s Online interactive resourses for the Scottish mathematics curriculum.

Mega Mathematics! — A collection of articles on mathematics from the Los Alamos National Laboratory.

MswLogo, An Educational programming language — A site of an educational software company where you can find out about MSWLogo, a graphical programming language, including colours and 3dimensional geometry.

National Association for Gifted Children –Information for teachers and parents of gifted children, with links to educational resources.

National Council of Teachers of Mathematics — The web site of the National Council of Teachers of Mathematics, an organisation dedicated to improving the teaching and learning of mathematics.

Nick’s Mathematical Puzzles — Puzzles that range over geometry, probability, number theory, algebra, calculus, and logic. They are mostly at preuniversity level, but require a certain ingenuity.

Number and Word Puzzles — A collection of 54 monthly puzzles to give education and entertainment for all ages.

PLUS MAGAZINE — A great collection of mathematical news, feature articles, a puzzle page and much more.
 Shack’s Math Problems — Anyone with an appreciation of a good maths problem should find something they like here, with problems ranging from basic math to differential equations. Each problem also comes with a difficulty rating from one to four stars.
 Texas Instruments Calculator Site — Information on Texas Instruments calculators, including graphing and programmable calculators.
 UK Mathematics Trust — The organisers of various UKwide maths competitions, including Individual and Team Challenges and the British Mathematical Olympiad.
 Underground Mathematics — “Rich resources” produced by the Cambridge Mathematics Education Project, based on the English ALevel syllabus but more generally applicable.
 Virtual Polyhedra — Pictures of polyhedra, which you can rotate interactively and view from the inside, and background information about them. This site is a self contained easytoexplore tutorial, reference work, and object library for people interested in polyhedra.
 Wolfram MathWorld — An encyclopaedia of mathematics, with many links both between entries and to other sites.