Groups Overview

This could be caused by a couple of different issues. First, students might not be able to see a group discussion because they aren't enrolled in a group. View Adding Students to Groups for information. 

Second, the issue might be related to not having the proper group settings in place on discussion topics. View Setting up Group Discussions for more information.

Yes. When groups are created in a course site, select Self Enrollment as the enrollment type option. Then students will be able to visit the Groups area in the course site and select the group they want to enroll in. View Creating Discussions for more information.

Yes. Faculty will often need to add an extra group to a set of groups (which D2L refers to as a "category") if the course enrollment changes significantly. View Editing Groups for more information.

Yes, any page that features a list of students, like Grades, Submissions, and Classlist, can be filtered by groups. Find the "View By" dropdown menu and select Groups, then select Apply. The list will repopulate with options to view each individual group. 

Yes, instructors can view an individual student's enrollment through the Classlist. Navigate to the Classlist, then select the downward facing arrow next to a student's name. Then, select View Groups.