There are many ways to make polyhedra from paper without scissors or tape. Sonobe polyhedra are a great first method to learn. Sonobe polyhedra are easy to make and put together, require a relatively small number of modules to achieve impressive results, and can be used to construct an amazing number of different polyhedra.
History of the Sonobe Module.
David Lister is an origami historian who is currently investigating the history of modular origami. He has posted a number of articles on the history and philosophy of origami. David was kind enough to answer some of my questions about the origin of the Sonobe module by e-mail. As far as David knows, there is no authoritative documentation stating that Mitsunobu Sonobe invented the module that now bears his name. Sonobe was a member of the Sosaku Origami Group 67 founded by Toshie Takahama. A picture of a cube created by Sonobe appears in a 1968 magazine issued by the origami group. Takahama used 3 Sonobe modules to create the figure known as "Toshie's Jewel" in the early 1960s. The Jewel and many related figures appear in several of her origami books. Because of this, some people have attributed the module to her. David thinks it is likely that Sonobe invented the module, but since Sonobe and Takahama frequently worked together, it may not be possible to determine definitively which of them originated it.
Origami in the classroom.
by Karen Bass.
For the past three years I found that origami added a lot to my math program. As a sixth grade math teacher I was always looking for that "special something- to illustrate math concepts and get students excited about the cirrculum. Voila! Enter origami.
As a self-taught folder of only a few months, I saw that geometry and origami were closely related, showing symmetry, angles and mirror images, area, congruency, volume and many other concepts. And so we began to fold in the classroom. Oral instructions were given in geometric terms.
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