[[alternative]]The Effect of On-line Peer Assessment on Learning PowerPoint

[[abstract]]The purpose of this study was to investigate the effects of on-line peer assessment and feedback (performance feedback vs. corrected feedback) on junior high students’ PowerPoint learning performance and attitudes. The samples of this study are 62 studennts in two classes. The subject were assigned to one of the four experiment groups: peer assessment - performance feedback group, peer assessment - corrected feedback group, staff assessment - performance feedback group, staff assessment - corrected feedback group.The result show that: (1)there was no significantly difference between the peer assessment and staff assessment on learning PowerPoint is not signal, (2) there was no significantly difference among the corelation between various assessment and various feedback on learning PowerPoint , (3) there was significantly difference between the corrected feedback and performance feedback, the corrected feedback group was significantly better than performance feedback group, (4)the method of peer assessment is acceptable by students, (5)peer can assess fairly, but someone doubts the fariness (6)the students gave a narrower range of marks than the teacher.