导入是课堂教学的主要环节,也是优化课堂教学的主要途径。一个好的导入设计,能使一堂课先声夺人,引人入胜,能激发学生的学习兴趣和旺盛的求知欲,并创造良好的学习氛围,为授课的成功奠定良好的基础。因此,教师在教学中重视导入的设计,对于优化课堂教学设计,提高课堂教学效率,具 Import is the main part of classroom teaching, but also the main way to optimize classroom teaching. A good introductory design can make a lesson start-winning, attractive, can stimulate students’ interest in learning and thirst for knowledge, and create a good learning atmosphere, lay a good foundation for the success of teaching. Therefore, teachers in teaching emphasis on the introduction of the design, to optimize classroom teaching design, improve classroom teaching efficiency, with