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International Slide Rule Museum
http://www.sliderulemuseum.com
The International Slide Rule Museum displays scans of over 1000 different slide rules, plus some downloadable instructions and manuals. Other features of the site include:
- slide rule encyclopedia
- data of interest to slide rule collectors and educators
- short tutorial on the use of slide rules, suitable for classroom instruction
Curator Mike Konshak has accumulated several sets (up to 25) of matching slide rules that are available as loaners to teachers wishing to introduce slide rules to students. The only charge is the return postage back to him.
Tanzzle™
http://www.tanzzle.com
Franco Cocchini offers Tanzzle™, software for exploring tangrams. Choose from four different sets of pieces:
- Tangram
- traditional seven piece puzzle
- Trapeze
- seven piece puzzle with two small triangles, one medium-sized triangle, a square and three quadrilaterals
- Phytagoras
- six piece puzzle with two small triangles, one medium-sized triangle, a small square, a medium-sized square, and one quadrilateral
- Number 5
- seven piece puzzle with two medium-sized triangles, one square, one large triangle, two parallelograms, and a quadrilateral
Areas of the site:
- Galleries
- Download Tanzzle v1.0 including 30 day trial version
- Download TZLviewer v1.0
- FAQ
View published patterns and/or submit one of your own:
http://www.tanzzle.com/galleries.html
Request a free license for schools and educational programs:
http://www.tanzzle.com/contacts.html
Tessellation Database
http://tessellation.info/
Patrick Snels designed this library of tessellations as a way to learn more about programming. View the works of different tessellation artists by using the pulldown menu at the top of the site. Click the "searching by subjects" link to browse a list of subjects depicted in the catalogued tessellations.
Notice that the name of the tessellation is superimposed on the thumbnail graphic. Selecting it will take you to a page with a larger version of the tessellation.
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