On teachers’ involvement in design and evaluation of collaborative activities: Case studies

This paper discusses the role of teachers during design, implementation and evaluation of activities that involve computer mediated collaboration. The reported research is in the frame of a study of collaborative peer-learning, during teaching algorithms. In particular we focus on two case studies that involved students of different levels (secondary education and university level). We discuss the main characteristics of the two studies: interesting findings concern the learning impact of the instructional approach used, process of discovery of existing common misconceptions and collaboration attitude of different student groups