As a group, primary school students have not been exposed to mathematics for a long time, so they must make it clear (I remember that when I was studying a variety of problem-solving methods in the second grade, my teacher asked me to solve problems in two ways. At that time, I didn't understand why I had to use two methods to solve the problem (because I didn't understand the concept, let alone work it out), so I must be able to give some examples on the stage during the interview, which can be vivid and humorous, but it must be easy to understand.
In addition, to be neat, you can have a summary or outline of what you want to talk about before class, so that students can know what to learn next. It is very important to let them know the usefulness of learning this section and its weight in future exams, so that students can know fairly well (I studied geography because someone told me the usefulness of studying geography before the start of school, so I worked hard after the start of school, but I didn't feel how hard I worked, but my geography performance was always at the forefront of my grade).
Interest. It is difficult for primary school students to cultivate their interest in learning, because they are still in the childhood of games, so they should give priority to guidance, ask more questions and explore the role of learning each lesson.