数学（Mathematics）.docVIP

数学（Mathematics） Teaching design and teaching of planting trees Teaching contents: PEP compulsory education curriculum standard experimental textbook of the fourth grade (2), 1 cases of 117---118 2 cases. Teaching target: 1., through discovery, we find the law of tree planting at two ends and no ends at one end of a line. 2., make students experience and experience complex problem simplification problem solving strategies and methods. 3., let students feel the wide application of mathematics in daily life, try to solve the simple problems in practical life by mathematical methods, and cultivate students application consciousness and ability to solve practical problems. First, the introduction of the conversation, a clear topic Mothers day has just passed, we once again usher in a happy holiday, June 1 childrens Day, which is the common festival of children around the world. Actually, there are still a lot of meaningful days in the year. What else do you know? Can you say a few? (born) Do you know what day it is in March 12th? Have you ever been involved in tree planting? Planting trees can not only beautify the environment, purify the air, but also have a lot of mathematical problems in tree planting. Today, well study the problem of planting trees together in this class. Blackboard writing topic: tree planting problem) Two, guide inquiry, and find the law of both ends must be planted 1. create situations and ask questions. Courseware produces pictures. This is a new road built in my county. There is a green belt in the middle of the road. Now, how do you grow a line of trees in the green belt? The subject: this highway is 1000 meters long, and planted a tree every 5 meters. How many saplings are needed? To understand the questions. A. by name reading, what information do you know from the questions? B. what does two ends mean? Should say, then the teacher demonstration point: where is the ends of the sticks? Note: if you take this stick as a green belt, green belt o