This course holds the quizzes that go with the Superior Stability course.
Anyone can take the quizzes but you must register for the site.
Each quiz links to the video lessons involved.
Not all video lessons are free to watch. Most require you to be a student of the iPTS.
If you are not a student of the International Piano Technicians School, and you pass the quiz, this can count towards your certification if you decide later to enrol in the school.