逆向思维．顾名思义就是从事物的反面去考虑问题的思维方式。现行生物学教材由于侧重于向学生介绍一般生物学常识和理论，描述性内容较多，这样．平时教学极易形成教师讲，学生听的一言堂现象。在教学中如能积极引导学生进行逆向思维，就极易调动学生思维的积极性，活跃课堂气 Reverse Thinking. As the name suggests, it is the way of thinking that engages in the reverse of the matter to consider the problem. Current biology textbooks focus on teaching general biology knowledge and theories to students. Descriptive content is more. It is easy for teachers to form lectures in the ordinary times, and the students are able to listen to what they say. If we can actively guide students to reverse thinking in teaching, it will be very easy to mobilize the enthusiasm of students’ thinking and to activate the classroom atmosphere.