It depends on the child. If the child is smart and receptive, there is no need to preview in advance. If children have poor comprehension and struggle in learning, it is necessary to preview in advance. For studious children, if they preview in advance, they will find the new lessons very boring when they start school, which will affect their further in-depth and serious study. For such children, we can let them mainly read Chinese after class to improve their reading ability. In mathematics, we can focus on oral calculation exercises to improve the accuracy and proficiency of oral calculation. As long as the oral computing ability is improved, the written computing ability will also increase. In English, we can let them watch some suitable English cartoons or create English picture books to improve their comprehensive quality. Children with slow acceptance generally have poor academic performance and lack confidence in learning. By letting them preview in advance, they can learn new lessons without difficulty, thus increasing their confidence in learning well. Such children need more repetition to learn knowledge and skills. Preview in advance and teacher's teaching can help them have a more solid grasp of what they have learned. Of course, we should pay attention to the ways and means of previewing in advance. Senior children suggest self-study, and junior children can let their parents preview. It is not recommended that children study with the training teacher in advance, because the training teacher may say something different from his own teacher; Secondly, the main purpose of self-study is not only to be familiar with textbooks, but also to exercise their ability to organize knowledge and refine knowledge points. If you go to an advanced training class, you lose this meaning. For children who have no self-study ability in the lower grades, it is necessary for parents to accompany them to preview. It's no use throwing books at children! I suggest you: 1. Finish your homework first, and take your child to preview the catalogue and the first lesson (chapter) of the new book at an appropriate time before school starts, so that he can understand it without losing his freshness. Of course, the children have already turned over the new books when they get them. But that's not a preview. We should cultivate children's habits and methods of preview from an early age. Methods suitable for children: reading, writing, drawing and speaking. Reading the text helps to read and improve reading ability. Remember the key points and don't know, deepen the impression. After school starts, you will have a focus, and parents will know it well. Draw a row of keywords and sentences to remind you. Talk about the feelings after preview and learn to reflect and summarize.