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2024年2月25日发(作者：简单的javascript特效)
《英语》（必修·第三册）
Unit 1 Nature in the balance
Welcome to the unit & Reading (I)
I. Learning objectives
By the end of the lesson, students will be able to:
1. grasp the way of understanding a documentary script;
2. know about some information of the Amazon rainforest;
3. express their opinions on environmental problems;
4. develop their critical thinking ability.
II. Key competence focus
1. Analyse and summarize the structure of the text.
2. Think critically and express opinions freely.
III. Predicted area of difficulty
Understand the structure and improve reading skills of the documentary script.
IV. Teaching procedures
Step 1 Lead-in
1. T plays the song on page 1 in class.
2. T leads Ss to talk about the song by answering the following questions:
• What is the message of the song? (It’s time to protect and love our home, the Earth.)
• What can you do to help protect the environment?
【设计意图：课前播放课本第一页的歌曲，烘托气氛，为文本主题埋下伏笔。通过歌曲提出的两个相关问题，一步一步切入课堂，慢慢熟悉话题，从而自然地进入到阅读部分。】
Step 2 Prediction
T leads Ss to focus on the title, the pictures and the first paragraph of the script and answer the
following questions:
• What will be talked about in the text according to the title and the picture?
• What could be the genre of the article?
• Read the para. 1. What aspects will be mentioned in the following paragraphs?
【设计意图：指导学生关注标题、图片和文中第一段内容，从而让学生快速获取文体特点、主题语境、下文内容等信息，这种创造性阅读的方式有助提升学生的预测能力。】
Step 3 Analysing the structure
T asks Ss to complete part A1 on page 4 with the main idea of each paragraph.
Para. 1: Introduction to the Amazon rainforest
Para. 2: Basic information about the rainforest
Para. 3: Plant biodiversity; levels of the rainforest
1
Para. 4: Animal biodiversity; food chain
Para. 5: The rainforest’s value to the human race; threats to the rainforest
【设计意图：指导学生快速获取段落主旨，帮助学生了解语篇的宏观结构，培养学生概括与归纳段落大意的能力，同时培养学生的阅读技巧。】
Step 4 Reading for specific information
1. T asks Ss to read the documentary script again carefully and fill in the blanks with the figures.
The Amazon rainforest
• 8 countries and one overseas region
• Around 6 million km2 of forest
• About 6,400 km in length
• More than 40,000 plant species
• More than 1,300 bird species
• Over 400 species of mammals
• Over 20% of all the Earth’s oxygen produced
• About 17% of the rainforest lost over the past 50 years
2. T asks Ss to read paragraph three and finish the diagram.
From the bottom to the top:
• A system of roots
• The mass of leaf litter
• Shorter plants with large leaves
• Towering ancient hardwoods
• The tops of the tallest trees
3. T asks Ss to read paragraph four and finish the food chain.
【设计意图：让学生再一次通读全文，重点关注第二、三、四、五段，用表格的形式帮助学生理解细节信息，让学生对段落结构、语篇结构形成深刻的理解。最后细读第三段关于植物的分层，用一个从上到下的图示形式来标识；细读第四段有关食物链的内容，用环形图示展示；这两步的设计都是为了帮助学生更清晰地理解植物分层和食物链的构成。在训练学生思维品质的同时，巩固所学知识，为下一个环节做好铺垫和准备。】
Step 5 Summary
T asks Ss to finish the chart to summarize the whole text.
Step 6 Discussion
1. T asks Ss to answer the following questions:
• What makes the Amazon rainforest a natural treasure according to the script?
• What is your answer to the question at the end of the script? Discuss it with your partner.
2. T makes a conclusion.
T: The Amazon rainforest is of great importance to us. It plays a significant role in maintaining the
fine balance of the Earth’s ecosystem. We can’t afford to damage the “lungs of the planet”. We
should live in harmony with it. Let’s protect it together!
【设计意图：第一个问题让学生再一次把握全文的核心，使知识再现。第二个问题用教材上留下的问题作为结尾，让学生进行小组合作，开动大脑思考，大胆地说出理由，这不仅培养了学生的批判性思维能力，也是知识迁徙的过程。最后教师进行总结，对学生的价值取向进 2
行正确的引导：人类要与自然和谐相处。】
V. Homework
1. Read the documentary script again and underline the difficult points that you cannot understand.
2. Are there any places in China with rich biodiversity like the Amazon rainforest? What are they?
Go to the library or surf the Internet to collect some relevant information. 3
4
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