Detecting Cheating by Analyzing Erased Answers
I had no idea this was being done, but erased answers are now analyzed on standardized tests. Schools with a high number of wrong-to-right changes across multiple tests are presumed to have cheated: teachers changing the answers after the students are done.
yt • February 16, 2010 6:45 AM
This was also explored in Freakonimics ( http://www.amazon.com/Freakonomics-Economist-Explores-Hidden-Everything/dp/0060731338/ref=sr_1_1?ie=UTF8&s=books&qid=1266323953&sr=8-1 ). By following the test scores of the same group of students over time, it was possible to spot which teachers had been cheating. Whenever a group of students showed dramatic improvement one year, only to show an equally dramatic decline the next year, it was a pretty good indication that teachers were cheating.
One of the reasons this happens at all in the first place is that there is so much emphasis on standardized testing in US schools, and so much pressure on teachers to improve their students’ scores. Even in classrooms with honest teachers, the teachers spend a lot of time “teaching to the test”, which can leave relatively little time for students to actually learn anything.