在小学自然教材第五册里编有太阳、地球、月球三个球体相对位置的变化规律,用来解释昼夜现象、四季成因、月相变化、日食月食。意图是通过这一单元的教学对学生进行科学自然观的教育,培养学生空间想象能力和逻辑推理能力。但是,教师仅从教材内 In the fifth edition of the Natural Science Textbook for Primary Schools, we have compiled the rules for the relative changes of the three spheres of the sun, the earth and the moon to explain the phenomena of day and night, the causes of the four seasons, the change of the moon phase, and the solar eclipses. The intent is to educate students about the concept of science and nature through the teaching of this unit so as to cultivate students' ability of spatial imagination and logical reasoning. However, the teacher is only from the textbook