Experiment scheme.
Students are divided into 4 different classrooms (A, B, C, D) within each subject (S1, S2). The same student is grouped randomly in one subject, and then grouped with our approach in the other subject (without their knowledge). Classrooms that are grouped randomly are shown in red (RG), and classrooms that are grouped with Minimum Entropy Collaborative Groupings (MECG) are shown in green (CHAEA) or blue (LML).