针对甘肃省民勤县第五中学近几年来生源参差不齐的状况,实施分层教学有着重大的现实意义,对于激发学生的学习兴趣,树立学生的学习信心,提高学生的学习成绩有很大的促进作用。在分层教学过程中利用优化学案,对学生进行合理的分层,选择合适的教学方式方法及设计有梯度的习题是分层教学的关键所在。 In view of the uneven source of students in No.5 Middle School in Minqin County, Gansu Province, it is of great practical significance to implement teaching in different levels. It is of great practical significance to stimulate students’ interest in learning, establish students’ confidence in learning and enhance students’ academic performance The promotion effect. In stratified teaching process, it is the key point of stratified teaching to use optimized case, to reasonably stratify students, to choose the appropriate teaching methods and to design a gradient exercises.