1. Case teaching can cultivate the innovative spirit and the ability and quality of the trained teachers to solve practical problems.

2. The knowledge acquired by trained teachers through case teaching is internalized knowledge, which can largely integrate those "uncertain" knowledge in education and teaching.

3. It can help trained teachers understand the difficulties in teaching and master the methods of analyzing and reflecting on teaching.

4. The gap between teaching situation and real life situation has been greatly shortened.

5. The application of cases can also make the trained teachers master the theory well.