Here is an article from our neck of the woods, Sammamish Review, Oct. 2011. It seems teachers in Issaquah School District are using document cameras and the Grade-Cam program to grade papers.
“Teachers at Skyline High School have caught on to what some in the Issaquah School District called a sort of grassroots tech initiative to help teachers save time, schools save money and students get instant feedback on tests.
On a test, a student bubbles in their student ID and their answers on a half-sheet form. The student or the teacher then swipes the completed test under the camera. Within a second or two, the computer screen flashes the student’s name and score and is ready for the next one.
Fowler said a class of about 30 students can grade its own tests within five minutes. Students can then go back to their seats and work on corrections while the program displays graphs telling her which students answered which questions wrong and which was the most commonly mis-answered question.” – Christopher Huber