Especially in the process of how tadpoles turned into frogs, but in the process of feeding, many small tadpoles died inexplicably. The death of tadpoles has become the most wanted thing for children. At this point, teachers should quickly change the purpose of teaching. What is the reason for the death of the tadpoles? Please continue to observe the growth of the tadpoles, and also pay attention to observe and summarize the reasons for the death of the tadpoles. In this way, children will have more new discoveries. In this case, the teacher proposed specific observation goals and tasks for the children in response to the death of the tadpoles. Children came to the conclusion that the tadpoles died by recalling the behavior of other children and carefully observing the tadpoles. While improving scientific knowledge, children's observation ability is cultivated and exercised.