Managing Instructors and Students
"Instructors" and "Students" are considered "roles" in the learning environment. As such, when you enroll a student in a course or assign someone to be an instructor for a course, you are essentially assigning them the role of "student" or "instructor" respectively.
For mandatory courses, this should be be automated through the use of programs.
If you prefer users to self-register (and the course is not mandatory), you can enable a self-enrolment method on any course.
If you prefer not to enable self-enrolment (and the course is not mandatory), you can manually register users. This includes registering instructors.