Arrange the preview homework. Pupils are young and have limited ability, so they often don't know where to start when preparing for classes. Many students simply understand preview as reading math books while studying and browsing. Assigning preview assignments can clarify preview tasks and encourage each student to preview purposefully. So as to consciously form good habits. Most primary school students are willing to do problems and assign students to try one or two exercises. It is more appropriate to practice in general textbooks as a preview assignment. Try to practice and test students' preview effect, which is an indispensable process of math preview. Ask students to test their preview effect by doing exercises or solving simple problems. On the basis of previewing the contents of textbooks, students help to understand and master mathematical knowledge by solving mathematical problems.

Learn to look at the key points and circle the difficulties. Students are required to read the textbook, understand what they are going to learn, understand the new knowledge as a whole, read the conclusions in the textbook, read the contents carefully, understand the main mathematical knowledge, read the difficult contents intensively, think and mark the doubts, draw the concepts and conclusions that they think are important, and circle the main points of knowledge, thus revealing the main contents of the new lesson. Prepare for understanding and mastering knowledge.

Let the students ask questions in the preview. The questions asked can be puzzles encountered in the process of "reading, thinking and practicing" or problems caused by students' learning content. Let the students think about the ideas and methods of solving examples, and think about what is the connection between new knowledge and old knowledge, and how to connect them. In the preview, students are constantly guided to ask questions, which leads to thinking about new problems, so that students can perceive the existence of problems and gradually form a sense of problems. Finding problems is the key to preview. "Learning begins with thinking, and thinking begins with questions", and preview is the process of discovering questions. Because there are problems, students have a goal in learning new courses. Learning with goals will get twice the result with half the effort.