When I wrote about the launch of online education startup Coursera back in April, one of the things that most intrigued me was the description that founders Daphne Koller and Andrew Ng gave of their plans for a peer-to-peer grading system. I’ve been a critic of the rise of the robot-graders — that is, the increasing usage of automated assessment software (used in other xMOOCS and online courses, as well as in other large-scale testing systems). While some assignments might lend themselves to being graded this way, I’ve been skeptical that automation is really the way to go for disciplines require essay-writing, despite the contention that robo-graders score just as well as humans do. Coursera said it would offer poetry classes (a modern poetry class starts this fall), and I just couldn’t see how even the most sophisticated artificial intelligence in the world could grade students’ intepretations and close readings.