Many studies have explored the effect of grouping and task distribution strategies in collaborative learning in the conventional condition, for example, grouping based on student's learning style, gender diversity, and motivation, but few studies have investigated the impact of heterogeneous grouping with mixed gender and ability factors and the…

There is increasing consensus among psycho-educational scholars about argumentation as a means to improve student knowledge and understanding of subject matter. In this article, we argue that, notwithstanding a strong theoretical rationale, causal evidence is not abundant, definitions of the objects of study (argumentation, learning) are often not…