Dreaming of a student who is behaving poorly and is sad while sitting in a chair can symbolize feelings of frustration or concern about someone's behavior or academic performance, possibly reflecting your own experiences or emotions related to school or learning. The chair may represent a place of reflection or contemplation, indicating that there are unresolved issues or emotions that need to be addressed.

This dream might also suggest feelings of helplessness or disappointment, either in yourself or in someone close to you. It could be a prompt for you to evaluate your own expectations or the support you provide to others. Consider what aspects of your life or the lives of those around you might be causing sadness or behavior that you find troubling.

To gain further insights, think about your own feelings toward education, responsibility, and how you handle challenges. It may be beneficial to reflect on ways you can support yourself or others in overcoming difficulties.