导入是指教师在讲解新课时运用建立问题情境、完成组织教学的教学方法。换言之,导入就是通过教师创设的教学情境,帮助学生在接受新知识前做好心理上、知识上的必要准备的一种教学行为。正是由于教师精心设计的导入,能够起到渗透主题,使学生集中注意力进入情境,引起学生对原有知 Introduction refers to the teacher in the new lesson to explain the use of the establishment of the problem situation, the completion of teaching methods of teaching organization. In other words, the introduction is through the teaching situation created by the teacher to help students in the new knowledge before doing a psychological, intellectual preparation necessary for a teaching. It is precisely because of the teacher’s well-designed introduction, can play the theme of infiltration, so that students concentrate on the situation, causing students to know the original