There is a large number of relationships between organisms in communities, and these relationships comprise the following types: predation and parasitism, commensalism, protocooperation and mutualism, neutralism, amensalism, and competition. The possible effects of the relationship between two species are that one or the other can benefit (+), lose (-), or neither benefit nor lose (0). By analogy, I have classified the behavioural relationships between students during group work. Different groups of students require different treatments. As a result, I propose a mixed approach to the formation of groups, careful observation of individuals, and the division of the work into smaller sections. In this way, low achievement of a group as a result of the uncooperative behaviour of some students can be prevented.