When it comes to students' grades, teachers need to take a balanced approach. Although it is necessary to criticize students' mistakes and shortcomings, excessive criticism may weaken students' confidence and motivation. Therefore, teachers should strike a balance between criticism and encouragement

Here are some suggestions:

1. Enhance students' self-confidence: Try to give students positive feedback, emphasize the good things they have done, and let them know why they have done well. This can improve students' self-confidence and stimulate them to participate in learning more.

2. Highlight the areas that need improvement: When teachers need to provide critical opinions, they should pay attention to how to express them. Point out students' shortcomings in a positive way and provide specific suggestions and support to help them improve.

3. Individual counseling: provide individual counseling to students who need extra help to help them overcome the challenges and difficulties they encounter. This can make students feel the care and support of teachers and increase their understanding and confidence in the course.

4. Encourage peer cooperation: Teachers can encourage students to learn and cooperate with each other and promote mutual understanding and support. This can create a good learning environment and encourage students to learn and communicate with each other.

In short, teachers should adopt positive and supportive methods to motivate students and provide necessary criticism and suggestions to help them succeed in their studies.