一、化小为大,突出对象的本质特征。自然现象纷繁复杂,由于各种因素相互交织,往往把事物的本质特征掩盖起来,不易分辨。如果运用电教手段,化小为大,就能比较清晰地将所研究的对象本质属性或内在联系揭示出来,较快地透过事物的现象,抓住本质。例如,我在教《动物怎样在地上行动》时,为了使 First, the small small, highlighting the essential characteristics of the object. Due to the complicated natural phenomena, due to various factors intertwined, they often cover up the essential features of things and are difficult to distinguish. If we use the method of audio-visual education, if we turn it into a big one, we can reveal clearly the essential property or the internal connection of the studied object and quickly grasp the essence through the phenomena of things. For example, I was teaching “how animals behave on the ground,” to make it happen