Original sentence: Results showed a slight improvement in group performance compared with that of previous cohorts, with a significant increase in first-class grades.Students self-selected groups for the first project; for the second, groups were more 'balanced'
Edited sentence: Belbin usefully contextualizes regularly occurring group work issues and provides students with ways of managing these issues[Citation Needed].Students self-selected groups for the first project; for the second, groups were more ‘balanced.’ Results showed a slight improvement in group performance compared with that of previous cohorts, with a significant increase in first-class grades