You can view Student Groups or Group Sets to see how many students are part of a group and exactly which students are part of a group.
Note: Student Groups are for student-to-student collaboration, and since students can be part of multiple groups, Student Groups are ungraded.
Navigate to Groups
Navigate to Group Sets
You can view a group set directly by clicking the name of the tab. The highlighted tab shows which group set you are viewing; to view another tab, click any other available one.