【案例】1.情境导入中蕴蓄“化繁为简”。(1)拉花。师:看,屏幕上是一个什么图案?把它组合,可以变出新的图案,这个图案比刚才的要复杂繁琐了。(2)蝴蝶图。师:再看,这幅来自壁画上的图案很美,也很复杂繁琐。你能看出它是由哪个简单的昆虫图案组成的吗?生:蝴蝶。(3)小结。师:能从复杂繁琐中看出简单,说明咱们班的同学都有一双慧眼。这双慧眼可以帮助我们认真观察,从繁琐中看出 【Case】 1. Situational import implies “simplify”. (1) pull flowers. Teacher: Look, what is a pattern on the screen? Combine it, you can change a new pattern, this pattern is more complicated than just complicated. (2) Butterfly. Teacher: Look again, this picture from the murals beautiful, very complicated. Can you see which simple insect pattern it consists of? Students: butterflies. (3) Summary. Teacher: Can be seen from the complicated cumbersome simple, that classmates have a pair of our eyes. This pair of eyesight can help us to observe carefully from the cumbersome