Metacourse

Meta courses are courses which take their enrolments from courses i.e. for every course 'enrolled' on the metacourse, all students in the course are enrolled in the metacourse.

Each time a student enrols on (or unenrols from) a course, s/he is enrolled/unenrolled from the metacourse(s) (although it doesn't happen immediately - it may take an hour to show up).

Teachers are able to choose whether a course is a meta course via the "Is this a meta course?" (yes/no) checkbox in the course settings. If a meta course is chosen, the students page changes from listing/searching for students, to listing/searching for courses.

The original discussion Meta courses experimental feature contains further explanation.