I used teaching AIDS directly when I told the first story. I found that some children began to focus on wall charts and were not interested in listening to stories. In the second and third stories, they simply used the form of wall charts, and there was no change in the way. In this way, the children's attention is even less focused during the second story, and even some children start talking to each other, so the whole activity is not obvious. In fact, now, in fact, when speaking for the first time, it is best not to use visual teaching AIDS, because visual teaching AIDS are easy to distract children's attention and are not conducive to cultivating children's listening habits.