《常识》第九册中的地理知识所占比重大,全册42篇,有27篇是地理知识。其中太阳系的组成、地球概况等知识深奥难懂;祖国的河流、湖泊,以及各地不同的自然环境,多数教师也只是从书本中读到,过去讲这些内容时只能照本宜读。因此,教师教得苦,学生学得累。省编《常识》音像教材,为突破地理教学难点提供了解难的条件。在教学第一课中的太阳和九大行星图以及意星轨迹图 Geographical knowledge in the ninth book of common sense accounts for a large proportion, with 42 volumes and 27 geography knowledge. Among them, the composition of the solar system and the earth’s surface are inextricably esoteric; the rivers and lakes of the motherland, as well as the different natural environments in different places, are only read by most teachers from books. Therefore, teachers teach hard, students learn tired. Provincial “common sense” audio-visual teaching materials, to overcome the difficulties of geography teaching to provide difficult conditions. The first lesson in the teaching of the sun and the nine planets map and the Italian star trajectory map