(教师为每一学习小组准备有代表性的、且有典型属性导向的叶子若干,用盒子装上。) 师:猜一猜,老师为每组准备了些什么?请大家打开盒子看看猜得对不对? 师:叶子是树木花草身体的一部分,有了它,树木花草才会生机勃勃,显得异常美丽。下面就请小朋友仔细观察盒内的叶子,看看能发现哪些秘密?(生分组观察后汇报) 生:我发现叶是绿色的。(板书:颜色) 生:我发现叶有各种不同的形状(板书: (Teachers prepare a representative, typically attribute-oriented leaf for each study group and fit it in a box.) Teacher: Guess what the teacher has prepared for each group? Please open the box and see Is not it right? Teacher: Leaves are part of the body of trees and flowers, with it, trees and flowers will be vibrant, very beautiful. Here are the children carefully observe the leaves inside the box to see what can be found secret? (Health group reported after the observation report) Health: I found that the leaves are green. (Blackboard: color) Health: I found the leaves have different shapes (blackboard: