课堂导入是教师引导学生参与学习的过程和手段,它是课堂教学的必需环节,也是教师必备的一项教学技能;它既是学生主体地位的依托,也是教师主导作用的体现。恰当的导入有利于创设良好的教学情境,集中学生的注意力,激发学习 The introduction of classroom is the process and means by which teachers guide students to participate in the study. It is an essential part of classroom teaching and an essential teaching skill for teachers. It is not only the support of students' subjective status but also the leading role of teachers. Appropriate introduction helps to create a good teaching situation, focus the attention of students, stimulate learning