The Digital Camera in Education
http://drscavanaugh.org/digitalcamera/
This presentation covers many topics like choosing a camera, pros & cons, animation and video. It gives examples of lessons that can be used.

Using Digital Cameras in the Classrooms
http://www.wacona.com/digicam/digicam.html#Lesson
Covers getting started and has good list of activities suggested by teachers.

Classroom Applications for the Digital Camera
http://k-12.pisd.edu/techs/dhitt/digital/camideas.htm
More ideas for using the digital camera.

Polaroid Education Program's Visual Literacy Center
(URL is very long, can reach site from Polaroid.com)
http://www.polaroid.com
For those of you who use an instant camera, there are links to lessons for early childhood, elementary, middle and high school students.