Engineering students (n=95) adopted a previously developed rubric (De Grez, Valcke, & Roozen, 2009) to assess the oral presentations of their peers (n=79). The rubric builds upon nine criteria (three content related criteria, five delivery related criteria and one overall criterion). In total, peer students scored 1105 oral presentations. This was carried out in six small groups and each presentation was assessed by - on average - 12 peers. The management of this large number of scores was made possible by a student response system. This response system was also used in the last session to collect answers to questions about self-efficacy and the students’ perception of their learning process including the perceived difficulty of assessing peers.