It is not a pleasant thing to find that students talk about their appearance in private, but if you really want to understand, you can try the following relatively euphemistic ways.： 1. **Side observation and communication**: Inadvertently chat with students who have a better relationship and are more cheerful about daily interesting observations in school and other topics, to see if there is any abnormal feedback or words about appearance in the natural communication, but be careful not to be too deliberate, so as not to cause students to be alert. 2. **Pay attention to social dynamics**: Observe the communication content of students in class groups, social software groups, etc., to see if it occasionally involves inappropriate ridicule or discussion about teachers, but follow appropriate privacy boundaries and do not pry too much. 3. **Ask reliable classmates**: Select individual reliable and trustworthy students, and ask them in a peaceful and sincere manner if they have heard of other classmates who have any special claims about their appearance, but tell them in advance not to spread at will. You are investigating this matter. 4. **Pay attention to classroom reactions**: Observe the changes in students' eyes and expressions in class. When you look at them, whether there are some dodge or unnatural manifestations, sometimes the subtle reactions of students may suggest some discussion behind them, but there may be multiple reasons for this, and comprehensive judgment is required. But it must be understood that students' discussions are not necessarily malicious, and many times they may just be unintentional words. If you really find that there are inappropriate or disturbing discussions, you can also guide them to establish correct concepts and a sense of respect for others in a suitable way. At the same time, the most important thing is to maintain self-confidence and a positive attitude, and not to let this kind of thing overly affect your emotions and teaching status.