I found these to add to my list of Islamic art links.
Religious Beliefs Made Visual: Geometry and Islam
Classroom activities designed to show how Islamic art can provide important
insights into the technology, scientific knowledge, and religious beliefs of
Moslems. http://www.askasia.org/frclasrm/lessplan/l000030.htm
Islamic Designs with circles (see the Rings of Gold lesson listed below)
http://mathforum.org/alejandre/circles.html
Lesson Plan Related to Islamic Metalwork
http://makeashorterlink.com/?F32B16623 (sorry-- I could find it on the site
when I did a search - this is a link to the Google cache)