The Groups tool is used to organize students into small groups in your D2L course site. You can then restrict discussion topics, content modules, grade items or other parts of your course site to a specific group so that it is only visible to its member. In addition, you can create group dropbox folders that allow all students within a group to see feedback you give files they submit to it.
Can students select their own groups in D2L?
Yes. When you create groups in your course site, you'll want to select "self-enrollment" as the enrollment type option. Then students will be able to visit the Groups area in your course site and select the group they want to enroll in. View the Creating Discussions guide for more information.