Abstract
In this paper we study the processes of interaction among students which occur during the implementation of structured and non-structured tasks for the construction of meaning in a science class. To analyse the educational speech that is generated in these interactions, we use a qualitative methodology based on discourse analysis. Our results provide a description and comparison of structures of participation and discursive resources that occur in both structured and non-structured tasks. Our work contributes to understanding the processes of student-student interactions and to an explanation of collaborative learning with different degrees of structuring.
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