教学内容:义务教育课程标准实验教科书人教版数学一年级上册第2单元第9~10页和12~13页练习。教学设想:“长短、高矮比较”对一年级学生来说并不陌生,大部分孩子在生活中通过对身边熟悉的物体的感知,已经积累了有关“长短、高矮”的感性经验,一部分学生也能够正确运用“长短高矮”这类词来描述物体的特征。因此,本课教学的关键是引导学生在合作交流中感知物体的长短、高矮关系,体会长短、高矮的相对性,学会 Teaching content: compulsory education curriculum standard experimental textbook PEP mathematics first grade unit on the second unit p. 9 ~ 10 and 12 ~ 13 exercises. Teaching ideas: “length, height comparison ” is no stranger to first-year students, most children in life through the perception of familiar objects around, has accumulated “length, height ” sensual experience , Some students are also able to correctly use the words “length” to describe the characteristics of the object. Therefore, the key to the teaching of this course is to guide students to perceive the length, height and height of the objects in the cooperation and exchange, to understand the relative length of the length, height, learn