纵观高中地理教材,按知识点分为八大单元,每一单元按节一课时一课时进行教学,一个课时就是一个相对的独立体,知识分散零碎。若按单元为单位进行教学,可改变这种情况,但内容过多,大多数同学又难以接受。因此,把每一单元按知识点分为二至三个亚单元,以亚单元为基本的授课单位。这 Throughout the high school geography textbooks, according to the knowledge points are divided into eight major units, each unit according to the first class lesson time lesson teaching, one lesson time is a relatively independent body, scattered knowledge. If the teaching is conducted in units of units, this situation can be changed, but the content is too much and most of the students are uncomfortable. Therefore, each unit is divided into two to three subunits according to the knowledge points, and the subunits are the basic teaching units. This