I experimented with having turkers grade elementary school math quizzes. The idea was that teachers would scan in their all their quizzes/tests/homework to be

I experimented with having turkers grade elementary school math quizzes. The idea was that teachers would scan in their all their quizzes/tests/homework to be graded along with the answer key, and turkers would grade according to the key. It worked, but the margins weren't there.