SWoRD is a web-based reciprocal peer review system. In less fancy terms, students turn their class papers into SWoRD, which then assigns this paper to three to six peers in the class. The peers grade the paper and give advice for how to improve it. Students revise the paper and turn it back in to SWoRD, which distributes the paper to the same peers for final review. SWoRD determines the accuracy of the ratings through a complex process of separating out different kinds of bias in grading.