Chapter 4.Population Dynamics I.Teaching Objective: 1.Develop the student's importance of Population level and Population Dynamics and Ecology. 2.Help the students to master Population Demography. 3.Help the students to know characteristics ofa Populatior L.Focal Points and Difficulties in the Chapter(教学重点和难点) 1.Focus Population demography 2.Difficulties Life table and survivorship curve IⅢ.ethodology Powerpoint presentation will be the main method.Blackboard will be an assistance.Some beautiful diagrams have been prepared for visualization IV Presentation(课堂讲解，学时分配为2学时左右) Step 1.Warm-up Activity List the main vocabulary in the chapter and explain Let the students have a understanding about the main problems discussed in the chapter. Step 2.The students are required to finish reading the whole text before the class and try to understand the major points of the chapter.The students are supposed to underline the difficult words or structures and raise their questions concerning any difficulties their may have in their understanding of the text,the teacher is