高中生物课内容比较抽象,有些内容很难,而学生的初中生物知识又极度欠缺,这给教学带来了很大难度。新课改倡导学生主体、教师主导地位。而高考的选拔又为新课改的时效性提出了挑战。如何在这样的大背景下让高中生物课变得生动有趣又极具时效性,是高中生物教师必须钻研的问题。我在教学过程中摸索出一些方法,采用灵活多变的教学方法。一、巧用比喻化疑难学习基因工程的工具酶时,学生总是弄不清DNA连接酶连 High school biology class content is more abstract, some content is very difficult, and the students junior high school biology knowledge is extremely lacking, which has brought great difficulty to teaching. The new curriculum reform advocates the main body of students, teachers dominance. The selection of college entrance examination also challenges the timeliness of the new curriculum reform. How to make high school biology lesson lively and time-sensitive in such a big background is a problem that high school biology teachers must study. I found some ways in the teaching process, using flexible teaching methods. First, the use of metaphor difficult to learn genetic engineering tools enzyme, the students always get confused DNA ligase