In order to sufficiently fill out the course opinion poll, you must complete at least half of your courses or at least ten courses enrolled in the current period. In order for a course to be considered complete,, you must answer all of the mandatory questions for at least one course–teacher or seminar group–tutor combination.
The teachers will always receive all saved responses, regardless of whether individual students have filled out sufficiently the course opinion poll as a whole.
In case of multiple active studies, all courses enrolled in all studies are considered in order to evaluate whether your course opinion poll is filled out sufficiently. A course enrolled simultaneously in more than one instance of active studies is only counted once.