Ertmer, P., Richardson, J., Belland, B., Camin, D., Connolly, P., Coulthard, G., Lei, K., & Mong, C. (2007.) Using Peer Feedback to Enhance the Quality of Student Online Postings: An Exploratory Study. Journal of Computer-Mediated Communication, 12, 412-433. This study used a small group of graduate students to assess the impact of peer feedback on the quality of students discussion posts in an online course. Each student posted a response to specific discussion questions and