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教材分析本课教材中先呈现了蜻蜓、蝴蝶等实物图,让学生观察、分析它们共同的特征,再安排做剪纸实验,然后揭示轴对称图形的特点并画出对称轴,这样学生可以逐步加深对轴对称图形的认识。教材中还安排了一些实际操作内容,可以帮助学生在实践活动中认识图形的特征,理解有关概念的含义。学生分析通过本节课的学习,学生一方面可以加深对一些已学图形特征的认识,另一方面可以辨识出自然界和日常生活中具有轴对称性质的一些事物,为以后进一步学习数学知
Teaching material analysis This course presents the physical image of dragonflies, butterflies and other students, so that students observe and analyze their common characteristics, and then make paper-cut experiments, and then reveal the characteristics of axisymmetric graphics and draw the axis of symmetry, so that students can gradually deepen Axisymmetric graphics understanding. The textbook also arranges some practical content to help students understand the characteristics of graphics in practical activities and understand the meaning of the concepts. Student Analysis Through the study of this lesson, students can deepen their understanding of some learned graphic features on the one hand, and on the other hand, they can recognize some things that have axisymmetric properties in nature and in their daily life, and further study mathematics knowledge