现行高中生物课本中,仅用一页的篇幅来介绍DNA的结构,由于教材过于精简,学生很难理解,容易造成死记硬背。为了使学生真正学好这部分知识,在教学中我增加了一些不要求学生记忆的辅助教材。这样,学生对课本的内容易于理解,效果较好,克服了以往那种欲速而不达的弊病。作法如下: (一) 对核苷酸的介绍首先指出DNA是一种大分子物质,基本组成单位是脱氧核苷 The current high school biology textbooks, only one page to introduce the structure of DNA, as the teaching material is too streamlined, students are difficult to understand, likely to cause rote. In order to enable students to really learn this part of the knowledge, I added in teaching some supplementary materials do not require students to remember. In this way, the students are easy to understand the contents of the textbooks, the effect is better, overcoming the urgency of the shortcomings. The practice is as follows: (A) of the introduction of nucleotides First pointed out that DNA is a macromolecular substance, the basic unit of deoxynucleoside