【教学内容】人教版二年级下册第29页。【总体设计思想】新课标指出:“数学教学,要从学生的已有经验和已有知识出发,创设有助于学生学习的情境,能进一步发展学生的思维能力,激发学生的学习兴趣。”由于本节课的知识学生已有一定的生活经验和认识基础。因此,在学习新课之前笔者为学生预留了课前预习作业,内容如下:让学生在家先预习,照着书上的内 【Teaching content】 PEP 2 second grade 29th page. The overall design ideas The new curriculum standard pointed out: “mathematics teaching, starting from the students’ existing experience and existing knowledge, to create a situation conducive to student learning, to further develop the thinking ability of students and stimulate students interest in learning . ”As a result of this class of knowledge students already have a certain life experience and understanding of foundation. Therefore, before studying the new lesson, I reserved for students pre-class homework, as follows: Let the students preview at home, according to the book