《分数的意义》教学设计及反思(国外英文资料).doc

《分数的意义》教学设计及反思(国外英文资料) Teaching design of fractional significance and reflection Third Yishui County Experimental Primary School Qiu Meizhi First, expand the significance of the 1/4 (a) a plurality of objects from one object to the 1. 1/4 know the score? Can you give me an example, what is the 1/4? 1: take one of the moon cakes were divided into 4 parts, one of which is that its 1/4 Well, suddenly thought of the moon cake. A moon cakes were divided into 4, one of the 1 copies of 1/4 can be used to represent? Well, such examples are? Who can say a 1/4? 2: a cake were divided into 4 parts, of which 1 copies of its 1/4 Who would like to talk about? 3: put some books were divided into 4 parts, each of which is 1/4. Hey, the students do not say, some of the books were divided into 4 parts, each one is it 1/4. Do you agree? There are 4: students?...... Strange, all things are obviously not the same, how 1/4 can be used to express? Student: because all of them were divided into 4 parts, one of which is 1/4. Originally, can be expressed in 1/4, and what is Never mind? 2. it is really a lot of 1/4 in life. The teacher also brought something, want to know what is it? Please look at the picture shown in Figure 1: apple. This is an apple, on average to four people, each person can, can use 1/4 to represent? Student: can Agree with him? Well, to see, in figure (a lot of Apple) There are a lot of apples, average to four people, each person share, can use 1/4 to say? Some students said, some students said. Lets do try. The teacher prepared some wafer for everyone, installed in your group envelope. Together with the group of four students, and use it to replace the apple, the actual points. Now think, these apples equally among the four of you, each share, what can not be used 1/4 to express. Students hands-on. Well, the students were very cooperative. All have their own ideas? Who can tell me? How much is your apple component? (Book: 8) do you think the 8 apples on average to 4 p