How did tadpoles become frogs?

Example: Spring has come. Recently, children have been learning about spring and looking for it. In spring, many children have a strong interest in small animals. In a common-sense activity, we use physical objects to understand the characteristics and process of their growth. In this activity, in order to let children know the growth process of tadpoles, I didn't instill knowledge into children as I did in previous classes, but I asked a child an enlightening question: Do you know tadpoles? Do you know how they become frogs? The children began to talk about it and applied their shallow understanding of tadpoles to the discussion of activities. Zhu Yifeng said: "teacher, I know that tadpoles grow hind legs first, then front legs, and then cut off their tails." . . . . . "Before he finished, Wu Chenyang said," No, no! The tadpole grows its front legs first, then its rear legs, and then its tail falls off. " Zhu Yifeng retorted: "I saw on TV that the little frog was changed by tadpoles, first the hind legs and then the front legs." At this time, there was a quarrel in the classroom. The opinion came into being. At this time, I said, "Children don't have to make any noise. Next we can observe these tadpoles. If you come to the plant corner to observe them every day, you will find the right answer. After talking about the children's silence, I think they must have secretly made up their minds to observe tadpoles more and prove their views in the future! Analysis: Because our children now basically live in big cities, our understanding of some small animals comes from adults, television and other media. Because there is no personal experience and experience as the backing, they are often at a loss in their activities. Because of this characteristic of children, we make bold attempts in teaching activities by using the second phase of curriculum reform, and advocate children's personal experience, so as to let them know more and be very helpful for their future study. Boutique comes from chemistry discipline.