一、教材本课内容是九年义务教育21世纪实验课本《数学》(北京景山学校编著)第五册“空间与图形”中“平移和旋转”一节。图形的平移和旋转在学生的生活中并不陌生,而作为新课程中新的教学内容则是学生第一次接触。因此,教材从生活实例入手,在大量感知的基础上,让学生体会和发 First, the textbook This course is nine years of compulsory education 21st century experimental textbook “Mathematics” (Beijing Jingshan school edited) Volume V “space and graphics” in the “translation and rotation” section. The translation and rotation of graphics is no stranger to students' lives, but the new teaching content of the new course is the first contact of students. Therefore, the teaching material starts from the life example, on the basis of a great deal of perception, lets the student understand and make