Melissa found Peergrade:

• Moderately improves teaching efficiency and productivity“By using scoring scales, I can easily see where students are doing well and what needs to be improved upon. This helps target my lessons. ”
• Significantly reduces teacher workload“I try to have students peer review work before submitting to me. This allows students to find their own errors, rather than me having to point them out. Also, at times, I'll use the student's feedback score from classmates as the score in the grade book. ”