In the group sets, you can automatically create groups for users to participate in.
In Course Navigation, click the People link.
Add Group Set
Click the Add Group Set button.
Create Groups Automatically
Name your new group by typing in the Group Set Name field . Under Group Structure, select the Split students into ___ equal groups radio button .
Type the number of groups you want to create in the Split students into __ equal groups field .
If you want to automatically assign a student group leader, click the Automatically assign a student group leader checkbox .
To create the group set, click the Save button .
Note: Groups will be automatically named based on the group set name.
View the group set  and the groups  (named after the group set) populated with students from the course. You can manually reassign students to a different group if necessary.
To manage a group, expand the group , then click the group Settings icon . To delete the group, click the Delete link . To edit the name of the group, click the Edit link .