Math World: Recreational Mathematics – Offers a list of activities available on the site. Some of the selections include: Cryptograms, dissection, folding, games, illusions and there’s MUCH more!
Math.com: Recreational – Puzzles, fractals, Spirograph, Roman Numeral calculator, and other topics.
The Math Factor: A Quick Puzzle From OSCON – Check out the archives of this site located on the right side panel for great information.
Yummy Math.com – Site provides students and teachers with engaging real-world math activities. Example page: Big Air Snowboarding
KhanAcademy: Math for fun and glory – Offers users the opportunity to explore doodling in math and puzzles.
Math Lair Recreational Mathematics – Offers a selection of activities related to recreational mathematics.
Math Overflow: Recreational Mathematics Where To Search – Where to find recreational math activities.
Age of Puzzles: According to the site, it offers ‘a colorful journey through endless patterns of quick wits’.
Math Pickle.com: Site is Organized By Grade and offers lots of games and puzzles.
Earth Measures.com: Native American Geometry DESIGNS – From the site: ‘The Design Section is a playground that exercises visual/mental creativity and behavioral precision.’
The Art of Mathematics – Offers a collection of downloadable books for educators to use.
Funschooling & Recreational Learning: Informal Math Activities – I offer a variety of fun and informal math activities such as: Roman Numerals, geometric art, spirals, strategy games, challenges, and quite a few other things to enjoy.
Wikipedia offers the following topics:
List of Recreational Number Theory Topics
Journal of Recreational Mathematics
Book: Recreational Mathematics
For the rest of this series please visit my Recreational Mathematics post.