教学内容与教材简析 本节教学内容为比例尺(教材第14页-16页),第1课时,新授课。 比例尺是在学生理解和掌握了比例的意义的基础上进行教学的。根据比例尺表示图上距离和实际距离的比,它可以作为比的应用教学;同时,对于一幅比例尺一定的图而言,所有的图上距离和实际距离都是成比例的;因此,比例尺也可以看作是比例的应用,根据比例尺求图上距离或实际距离都要列出比例式来求解。现行教 Teaching content and textbook analysis This section teaching content for the scale (textbook page 14 -16), the first class, the new lectures. The scale is taught on the basis that the student understands and masters the significance of the scale. According to the scale, the ratio between the distance on the map and the actual distance can be used as a teaching of the ratio. At the same time, the distance between all the graphs and the actual distance are proportional to a certain scale; therefore, the scale Can be seen as a ratio of applications, according to the scale to find the distance or the actual distance must be listed proportional to solve. Current teaching