Create group
From MoodleDocs
File:Administration Block Course Group Group add.JPG After creating a grouping for a course, next create the group.
Give the group a new name. Add a description of the group if needed. Add a picture for the group (a seal with ribbon in this example). The course group enrollment key when submitted by the student upon entering the course for the first time, will also assign them to the course. There is a pull down to change the grouping that this particular group is in.