1) Teachers should listen fully to students' complaints without interrupting and believe what students say even if the issues seem petty or exaggerated.
2) When students bring complaints, teachers should act immediately to investigate and address the situation rather than delaying, which could allow injustice or neglect.
3) If teachers cannot address a complaint immediately due to other tasks, they should make a clear promise to the student about following up later, and it is important to fulfill that promise in a timely manner agreed upon with the student.