Many thanks to the following people and educational organizations/sites for linking to this site:

- Juha Puranen, from his mathematical puzzles page
- Oxford University Invariant Society, from Other Mathematical Links
- Heriot-Watt University, Department of Mathematics, from External Links
- Nina Newlin, from Games, Puzzles, Problems, Brain Teasers & More Fun
- Whatcom Community College Online Math Center, from Puzzles
- Diane L. Judd, Ph.D, from Integrating Technology into the Curriculum (Mathematics)
- Department of Mathematics, Uppsala University, from Mathematical Links
- Les Reid, from Links to Other Puzzle and Problem Pages
- Artur Gorka, of Clemson University, from Mathematical Web Resources
- University of Wisconsin - Marathon County, from A Catalog of Mathematics Resources on the WWW and the Internet
- Kansas State University, Department of Mathematics, from Mathematical Sites
- The Math Forum @ Drexel, from an entry in its Internet Mathematics Library
- Torsten Sillke at the University of Bielefeld
- Mathematics Education Resources (Math links by Bruno Kevius)
- David Wilkinson, from Recreational Mathematics Links
- Richard Kaye, from Stepping up to University Maths: mathematics links
- University of Plymouth: Centre for Innovation in Mathematics Teaching, from A Guide to Sources of Information about Recreational Mathematics
- Cornell Theory Center Math and Science Gateway, from Mathematics

- Oundle School, from A Selection of Mathematics Web Sites
- The Sheffield College, from Weblinks / Mathematics / Teaching Resources
- Metamora Township High School, from Math
- Nelson and Colne College, from Virtual Library Links for Maths
- West Haven Public Schools, from Math Links
- King City R-I School, from Mrs. Townsend's Math Resource Page
- Alliance High School, from Math Websites for Enrichment and Practice

- The Scottish Mathematical Council, from Other Mathematical Web Sites
- Mathematics Problem Solving Task Centres, from Other Problem Solving Sites
- The Canadian Mathematical Society, from Knot a Braid of Links
- New Zealand Mathematics Enrichment Trust, from Interesting Sites
- International Mathematics Olympiad (IMO), from Archives and Link Collections

- mathschallenge.net, from Puzzles and Games
- mathwizz.com, from Fun and Games
- Treebeard, from More Stumpers on the Web
- The Frightening World of Mathematics
- Kentucky Council of Teachers of Mathematics, from Mathematics Resources on the Web
- MathNerds, from Useful Web Sites
- Spartacus Educational, from Education on the Internet (Number 59) and Mathematics
- e-Learning Centre, from School e-Learning Showcase
- MathsNet, from MathsNet Links
- Homeschooling On A Shoestring, from Mathematics
- Ray Schroeder, from Challenging your Gifted Students through the Internet
- Sites for Teachers
- internet4classrooms, from Daily Activities (Mathematics)
- Angela's Mathematical Links
- Study Stack, from Educational Resources
- Burlington County Library System (NJ), from Mathematics Sites
- Intute: Science, Engineering and Technology, from Science, Engineering and Technology
- ELApro.net Web Portal, from Mathematics: Puzzles, Problems & Games
- Homeschool Math, from Online math resources
- Computing Technology for Math Excellence, from Math resources
- The Art of Problem Solving, from Math Contest Problems
- Mathematics in Education and Industry, from MEI Online Resources: Useful sites
- The Further Mathematics Network, from Links
- Math Help, from Math Puzzles
- Eric Schechter, from About "This Week in Mathematics"
- Lifesmith Classic Fractals, from Hotlinks
- Waldo's Interactive Maths Pages, from Waldo's Links