一般数学课的结构是,前面大部分的时间由教师集中讲解,最后留几分钟让学生课堂练习。这样的教学结构对于我们生源很差的初中很不适用。因为我们的学生大部分理解能力较差,上课又很难集中思想。而且学生对数学概念的理解与运用有一个由浅入深、从简到繁的过程,“集中讲解,最后练习”的结构也违背了学生的认识过程。 The structure of the general math class, the front most of the time by the teacher focused on the last few minutes for students to practice in the classroom. Such a teaching structure is not suitable for junior high schools where we have a poor student base. Because most of our students are poorly understood, it is hard to concentrate in class. Moreover, students 'understanding and application of the concept of mathematics has a process of transformation from simple to complex, and the structure of “concentrated explanation and final practice” also runs counter to the students' cognitive process.