Choosing Peers, Improve the Quality of Peer Assessment

Peer assessment has got a lot of attention because it serves as a useful tool for scaling the grading of open-ended works. But it does not always produce accurate results because of two important reasons: students' ability and students' attitude. Based on students' peer grades and the evaluation attitude in the previous tasks, we proposed a new method to calculate students' evaluation ability value. Then we improved user allocation algorithm. In this way, we can protect learning enthusiasm of all students. Meanwhile, we calculate final score through choosing good students. So we can enhance the credibility of peer grade and show students comments of better quality.