录像是诸多教学手段中唯一能真实而连续地反映某些生理活动过程的现代教学方法。其直观效应的明显程度，优于其他电教手段。１录像教学有助于突破教学中的重点和难点：有些生物知识道理简单，却难以观察，就成为学习中的难点，如青蛙的捕食过程极快，单凭讲解，学生不能清楚 Video is the only modern teaching method that can truly and continuously reflect certain physiological activity processes among many teaching methods. The obvious degree of its intuitive effect is superior to other audio-visual methods. 1. Video teaching helps to break through the key and difficult points in teaching: Some biological knowledge is simple but difficult to observe. It becomes a difficult point in learning. For example, the frog’s predation process is extremely fast.