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【教学目标】1.让学生经历讨论、探索平行四边形基本特征的过程,掌握它的基本特征,能正确判断平行四边形的底和高。2.让学生在观察、操作、比较、判断等活动中,积累认识图形的经验,发展空间观念。3.让学生感受图形与生活的联系,进一步发展“空间与图形”的学习兴趣。【教学重、难点】探索平行四边形的特征【教学过程】一、创设情境,引入新课谈话:你能指出每幅图中的平行四边形吗?【设计意图:由学生熟悉的图画引入新课,激发学习兴趣,调动学习积极性。】二、合作探索,学习新知
【Teaching Objectives】 1. Let the students experience the process of exploring the basic characteristics of parallelograms, master its basic characteristics, can correctly judge the bottom and the height of the parallelogram. 2. Students in the observation, operation, comparison, judgment and other activities, the accumulation of experience in understanding graphics, the development of space concept. 3. Let students feel the connection between graphics and life, to further develop the “space and graphics” learning interest. 】 【Teaching heavy and difficult to explore the characteristics of parallelograms 【Teaching process】 First, create the situation, the introduction of a new lesson Talk: Can you point out the parallelogram of each figure it? [Design intent: Students familiar with the introduction of a new lesson, Stimulate interest in learning, mobilize the enthusiasm for learning. 】 Second, to explore cooperation, learning new knowledge