Case studies are presented of the out-of-class behaviour of two contrasting class groups of university students from departments with very different learning environments. One group displayed avoider behaviour, by working together to minimise the amount of work each individual had to do. The other class consisted of more coherent groups of students who socialised together and worked to reach a better understanding of conceptual material; we labelled this engager behaviour. The cases show that both the levels of social coherence of the groups and the out-of-class group learning approaches were strongly influenced by: the curriculum, the type of teaching, the nature of the assessment, the relationship between teachers and students, and the environment within the respective departments.