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The Math Forum is the comprehensive resource for math education on the Internet. Some features include a K-12 math expert help service, an extensive database of math sites, online resources for teaching and learning math, plus much more.

This site contains galleries of photographs and articles about original origami designs by Robert J. Lang. Origami is the modern reincarnation of the ancient Japanese art of paper-folding. The site contains links to books and origami instruction and ...

Over 500 free diagrams. Includes: history of origami, Sadako

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Enchanted Learning Software creates children

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

The International, multidisciplinary forum dedicated to applications, development, education, and research in modeling and simulation.

Get answers to your Mathematica, Wolfram|Alpha, CDF, or other Wolfram Technologies questions. Connect with other users. Share code & files. Access social media channels for Wolfram Community.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

Reviews and free software downloads for Windows, Mac, Palm, Pocket PC, and Mobile Phones. The best programs and games. Buy software directly online.