I think it is primarily a topic. Something was discussed that concerns the pupils directly and they can perceive it directly: e.g. noise, clutter, bad air. Wednesday 3. 4. History, 8. class. Lesson topic: Bach's absolutism. Bach's absolutism. I was in charge of the lesson and I must admit that I did not manage to attract the students too much.
8th grade. Lesson topic: Bach's absolutism.