1. Students provided more accurate evidence. Sometimes, students may provide more accurate evidence to prove that their scores should be higher, recalculate their scores or provide more detailed homework or exam answers.
The teacher made a mistake. Teachers may also make mistakes, miscalculate or miss papers, and then they need to revise their grades to correct their mistakes.
3. There is something wrong with the exam or homework. Sometimes the exam or homework itself has problems, unclear questions or mistakes. At this time, it is necessary to modify the grades to reflect the real student level. Teachers should carefully examine students' applications to ensure the rationality and accuracy of the revised grades. Students should also provide sufficient evidence and reasons and abide by the relevant regulations and procedures of the school to ensure the legality and effectiveness of the applications.