教学素材是教学设计的基本组成元素,是教师根据教材内容、教学环境和学生学情所组织的有助于教学的资料,它包括文本、图形、图像、动画、视频、音频等。学生对知识点的掌握、对操作技能的熟悉、对情感的体验,都是围绕教学素材展开的。因此,教学素材的选取往往非常关键,好的教学素材必将更有益于学生轻松地学习,也将有利于教学实效性的提高。高中阶段的生物知识较为抽象难懂,所以合理的选择教学素 Teaching material is the basic component of instructional design. It is a teaching material which is organized by teachers according to the content of teaching materials, teaching environment and students’ learning. It includes text, graphics, images, animation, video, audio and so on. Students grasp of knowledge points, familiarity with operational skills, emotional experience, are all around the teaching material. Therefore, the selection of teaching materials is often very crucial, good teaching material will be more conducive to students to easily learn, but also conducive to the improvement of teaching effectiveness. Biological knowledge in high school is more abstract and difficult to understand, so a reasonable choice of teaching elements