In the classroom, guest instructors have the same capabilities as the instructor. They appear on the top row at all times with a star next to their name, they can see and use the timeline or start and end polls. Guest instructors do not have any special capabilities outside the classroom (e.g., for grading).
Adding a Guest Instructor
On the Class Edit Page, click People to edit the members of the class.
In the People Module, add guest instructors by typing in their name or email into the Guest Instructors text box