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Platonic Realms: The Mathematical Art of m.c. Escher
Math Academy Online presents a great M.C. Escher (1898-1972 CE) site for connecting the arts and mathematics. As even Escher said, "For me it remains an open question whether [this work] pertains to the realm of mathematics or to that of...
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University of Central Florida: Mathematics Classroom Uses for the Digital Camera
This site has a few creative lesson plans on using the digital camera in a mathematics classroom. Includes geometry and measurement activities. (The link for the counting book does not work in archived version of site.)