导入是一堂课的开场白,有效导入就像磁石,能把学生分散的思维凝聚起来,提高其智力活动的积极性,为授课的成功奠定良好的基础。导入是为了学生更好地学习,教师应精心组织教学内容,努力设计有效的课堂导入,把学生引入数学的殿堂,在知识的海洋里尽情畅游。 Introduction is the introduction of a class, the effective introduction of magnetism, students scattered thinking can be condensed together to enhance their intellectual activity enthusiasm for the success of teaching lay a good foundation. Import is for students to learn better, teachers should carefully organize the teaching content, and strive to design an effective classroom introduction, the students into the temple of mathematics, enjoy the sea of ​​knowledge in the sea.