When I started highschool, I had a talented, severe piano teacher.
You know the cliché musicians who moan and bang on the piano in frustration? She was in that crowd.
She held an event every 2 months, mostly masterclasses and performances. Sometimes a performer came in, sometimes the students played for each other.
In the masterclasses, everyone played something. A girl played a Czerny finger exercise once.
This teacher started some massive sadness in my life, but I learned a lot from her. We parted ways because I started crying too often. And she was cheating our money (probably by accident).