You can create collaborations within your groups the same way you can create a collaboration in a course.
As an instructor, if you want to create a document for a certain group, create it within the group. Or you can create a Collaboration in the course by adding a group per document.
Open Group Set
Click the Settings icon , then click the View User Groups link . Or click an existing group set .
View Group Home Page
In the group set , click the group Settings icon . Then click the Visit Group Homepage link .
Start a New Collaboration
Start a new collaboration.
Note: Your Collaborations view may vary depending on the Collaborations available in your course.