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一、学生状况分析学生在小学中已接触到“平行”知识,生活中也接触到了大量的平行现象,对于“平行”已经有充分的感悟和体验.并且在本章前几课时的学习中已对点、直线(线段)、角这些基本的几何元素有了很深的认识,从数量的角度学习了线段、角的度量以及线段长短、角的大小比较.使学生有了丰富的知识储备.学生从小学到初中多次经历通过画图、折纸、合作、交流等活动来研究探索问题的过程,能适应对本课研究“平行”的定义和性质所采用的方法.学生具备从生活中提炼数学的素材的能力,对定义的归纳和性质的探究有较好的方法准备.二、教学任务分析本课是学生在对平行线的初步认识的基础上进一步了解、认识平行线的定义和有关性质.主要教学目标是:
First, the analysis of the status of the students in primary schools have been exposed to “parallel ” knowledge, life also exposed a large number of parallel phenomena, for “parallel ” has been fully sentiment and experience. Learning has been on the point, the line (line), the angle of the basic geometric elements have a deep understanding of the number of angles from the perspective of line, angle measurement and the length of the line, the size of the angle so that students have a wealth of Knowledge reserve Students from primary school to junior high school experience many times through drawing, origami, cooperation, exchange and other activities to explore the process of exploring the problem, to adapt to the study of this class “parallel ” definition and nature of the method used. The ability to extract mathematical material from the life, the definition of the induction and the nature of the inquiry has a better method of preparation.Second, the task of teaching This course is based on the students first understanding of the parallel line to further understand and understand the parallel lines The definition and the nature of the main teaching objectives are: