Pick two cases: the one you most want to present (your first choice) and one alternative. Groups need at least 4 and at most 6 students. Cases that do not reach 4 will close, and their students move to their alternative. Each presentation is a 15-minute case study.
Built from the current choices: cases below 4 students close one by one and their students move to their alternative. This is a suggestion; nothing is saved.