The teacher knew that the students were under great pressure before the exam, so she bought a roast duck for each student, hoping that the students could relax when eating roast duck and do better in the next exam. Moreover, the teacher bought roast duck for his classmates with a sense of ceremony, and many students were moved by it. Young people nowadays like things with a sense of ceremony. Presumably, the teacher's practice is just to his liking, which is much more useful than verbal encouragement and praise.
It can be seen that the students are also very satisfied with the teacher's practice, because every student moved the books on the table to the ground, and only a roast duck and roast duck sauce were put on the table. In the picture, every student wears disposable gloves, and every student looks very happy when eating roast duck. Besides, this teacher is really generous. I thought the teacher would let several students share a roast duck, but I didn't expect the students to be treated so well that one person could take a whole one. Presumably the teacher did spend money.
This teacher is really considerate of his students. Teachers encourage students in the way they are most willing to accept. I believe that students can also get encouragement from teachers. I hope the students will live up to the teacher's expectations and refuel after eating roast duck. The teacher doesn't want to kidnap students morally with roast duck. The teacher just wants to relax everyone in the best way.