教材分析北师大版实验教科书第四册中的“平行四边形”,从学生的生活经验出发、从具体物体中抽象出平行四边形的概念,并让学生通过一系列活动,加深对这一几何图形的印象。学情分析学生已在一年级“七巧板”一课中认识了平行四边形,上本课前还经历了用七巧板拼正方形与长方形的? Textbook analysis Beijing Normal University experimental textbook fourth book “parallelogram”, starting from the students’ life experience, abstracted from the specific object parallelogram concept, and let students through a series of activities to deepen the geometry impression. Student Analysis Students have understood the parallelogram in the first grade “Tangram” class and also experienced the use of tangram to square and rectangle before this class.