生物教师在指导学生进行动物解剖时常常碰到一个难题,这就是由于实验材料的限制,教师往往讲不清,学生难以学会。例如,蝗虫由于个体很小,实验内容也较为复杂,既要教会学生观察复眼、单眼和触角,又要剪下3对足、二对翅,拆开口器,还要从身体后端沿背面正中线稍偏左的地方剪到头部后面,将左半边体壁用镊子拿去,再把头部左半边也剪掉,最后将露出的各内脏器官用标签表示。如果用实物示范,即使分小组进行,学生也很难看清楚,而用挂图又难一一讲清。每次实验都达不到要求。为此,我们运用电化教育攻克实验教学中的难点,并取得了较好的教学效果,现以解剖蟾蜍实验为例进行说明。 Biology teachers often encounter a difficult problem in guiding students to conduct animal anatomy. This is due to the limitations of experimental materials. Teachers often cannot speak clearly and students are difficult to learn. For example, locusts are small because of their small size, and the content of the experiment is also more complicated. They should not only teach students to observe compound eyes, monoculars, and antennae, but also cut 3 pairs of feet and 2 pairs of wings, remove the opening device, and also follow the back of the body from the back. Slightly to the left of the midline, cut behind the head, remove the left half of the body with tweezers, cut off the left half of the head, and label the exposed organs. If physical demonstrations are used, even if the sub-groups are conducted, students will have difficulty in seeing clearly, and it will be difficult to make clear one by one with a wall chart. Each experiment can not meet the requirements. To this end, we have used electrification education to overcome the difficulties in experimental teaching and achieved better teaching results. Now we will use the anatomy and hearing experiment as an example.