Evaluating the quality of teachers' classroom teaching depends on several factors, such as teaching basic skills, teaching ideas, teaching methods, teaching material handling, teaching efficiency and so on. First, we should have a clear understanding of the new curriculum, and each class should put forward clear, diverse and appropriate teaching objectives that meet the characteristics of primary school students' scientific learning. Second, in the process of classroom teaching, we should pay attention to the rationality of teaching design, depending on whether teachers carry out valuable inquiry activities according to the actual situation of students. Third, we should evaluate the effect of classroom teaching from the external performance of students and the three pairs of important relationships implied in the teaching process. First, we should pay attention to the two "quantity" changes reflected by students in the classroom. One is participation, that is, the proportion of students who actively participate in inquiry activities in the class; The second is innovation. Secondly, we should observe whether the three pairs of relations in this class are harmonious, that is, the guidance of students and teachers, the interest and exploration of activities, and the quantity and quality of activities. Fourthly, in terms of teachers' quality, it mainly depends on whether teachers can effectively standardize classroom teaching from the characteristics of scientific teaching. Fifth, the design of the examination scheme should shift from the examination of memory knowledge to the examination of understanding and application knowledge, and attach importance to the examination of students' independent or cooperative inquiry ability.