As a teacher, I once sat in on a teacher teaching "The Revelation of dripping water wears away the stone". The instructor focused his teaching on the cases of three famous people. He took water drops, three celebrities and rainwater as examples. To illustrate as long as the goal is specific, we will succeed if we persevere. Throughout the teaching, the students learned what argumentation is and how it expresses. And education of outlook on life and values through celebrity examples. Although he seems to care about everything, everything left a deep impression. To summarize, he fails to properly give instructions and actually works to retard the ability of a student to comprehend new lessons. The reason why the observation class was not successful is that the teacher did not plan it with his heart. Therefore, it is easy to find that the three famous examples are good pragmatic training points. He should pay attention to teaching students learning and use the method of expression.