No. Anyone can purchase access to PracticePerfect and start using it without a professor’s involvement. PracticePerfect is a student-focused product designed to supplement coursework. PracticePerfect can be used by anyone interested in learning about or refreshing their knowledge of the subject matter, even if they are not enrolled in a specific course.
It is possible that your professor might ask you to join a class they have created in order to monitor your progress on video quizzes in PracticePerfect. Nevertheless, you can still use PracticePerfect without joining a class.