The Groups tool in D2L allows you to set up your students into groups so they can submit a group presentation to the Assignments tool, engage in a group Discussion, etc. Here is some information for you around how to create groups, and for your students on how to engage with the Groups tool.
For Instructors
Creating Groups
Creating Groups for Multi-Instructor Courses
Managing Groups
Enrolling Students into Groups
Linking Various Tools in D2L to your Groups
For Students