Unit 3 Environmental Protection Reading and Thinking 教学设计-2023-2024学年高中英语人教版（2019）选择性必修第三册

Teaching Objectives By the end of this class, students will be able to 1. know about the climate change and understand the main idea of each paragraph. 2. learn about the “greenhouse effect” and know how it works. 3. analyse the consequences of climate change and enhance the awareness of environmental protection. 4. voice their personal opinions on how to protect environment by teamwork. Teaching important points 1. Lead students to better comprehend the significance of environmental protection. 2. Help students know the “greenhouse effect” and know how it works. 3. Help students analyse the consequences of climate change. Teaching difficult points 1. Help students understand the structure of the passage and know the writing type. 2. Help students speak out their opinions on environmental protection by critical thinking. Teaching methods PWP model;Question and Answer; Cooperation;Individual work;Discussion. Teaching Procedures Step 1: Warming up Activity 1【Look and answer】 1.What is it about? 2. What information can you get from it? 3. Why did it happen ? 4.What other consequences of the global warming? (Purpose:Arouse Ss’ interests, stimulate their background knowledge of environmental problems and create a relaxed learning atmosphere) Step 2: First-reading 【Listen to the tape, read the text and get the main idea.】 (Purpose:Help students get basic understanding of the passage) 1. What is mainly discussed in this passage? A. Some polar bears died of starvation. B. What the greenhouse effect is. C. How the polar bears find food. D. Global warming has caused some disasters and we must pay attention to it. Step 3: Careful-Reading (Purpose: Help students understand the passage thoroughly) Para 1: Q1: What is the problem? Q2:What are the evidences of climate change? Para 2: Activity 1 :【When;Where;What;Why】 Q1: When did it happen? Q2: Where did it happen? Q3:.What did they find? Activity 2 :【Cause and effect】 The following reasons account for the death of the polar bear, with one influencing another. Put them in a correct logical order. low sea-ice levels starvation longer food-seeking travel lack of food climate change Q2: What is the root cause? Para 3: 【Listening】 Activity 1:【information searching】 Q1. What is the definition of natural greenhouse effect and man-made greenhouse effect? Q2. What is the function of natural greenhouse effect? Q3. What is the problem of man-made greenhouse effect? Activity 2:【Find out how the greenhouse effect works】 Para 4: 【Finish the following chart】 Para 5: Q1: Who has the responsibility to help reduce global warming?