Activation teaching methods should be used mainly in more problematic classes. I also think about why the teacher talks about this class as problematic. I think the stumbling block is in students' approach to music education. They don't like it, they don't find the meaning of those hours, maybe they're bored, so they just interrupt. But I'm afraid the cause of all this is in the teacher's approach.
I think the stumbling block is in students' approach to music education.