《昼夜与四季》是苏教版《科学》五年级下册第五单元的教学内容。这一单元属于“地球和宇宙”知识部分,是小学科学教材中重要的教学内容之一。学生对四季变化和昼夜交替都有自己的一些独特感受,而且对这种现象的成因也有所耳闻。于是,我在教学中就从学生的认知能力和生活体验出 “Diurnal and Four Seasons” is the teaching content of the fifth unit of the fifth grade of Science in the Sujiao edition. This unit belongs to the knowledge part of “Earth and Universe” and is one of the important teaching contents in primary school textbooks. Students have their own unique feelings about the changing seasons and the alternation of day and night. They also hear about the causes of this phenomenon. So, I learned from the students’ cognitive ability and life experience