经过详细的一轮复习后,学生对高考生物知识已能系统的掌握,也积累了一定的解题经验.但仍面临着一些困惑,就是课上容易懂,课后容易忘,考试容易错.而来自教师的抱怨也不少,刚复习过的知识,变换角度再出现时,学生仍然失分严重.因此,如何提高第二轮复习的有效性、灵活性和规范性就显得尤为重要.为了解决学生的困惑和教师的抱怨,笔者在第二轮复习教学中针对不同的教学内容编写了三类不同的学案,以提高教学的有效性. After a detailed round of reviewing, students have systematically mastered the biological knowledge of college entrance examination, but also accumulated some experience in solving problems, but they still face some confusion, that is, they are easy to understand in class, easy to forget after class, and easy to take exams. However, there are also a lot of complaints from teachers, and students just still lose points when revising the knowledge they just reviewed, so it is particularly important to improve the validity, flexibility and standardization of the second round of review. Solve the students ’puzzled and teachers’ complaints, the author in the second round of reviewing the teaching of different teaching content for the preparation of three different cases, in order to improve the effectiveness of teaching.