译林版(2020)必修第三册Unit 1 Welcome to the unit&Reading教案

Unit 1 Nature in the balance
Welcome to the unit & Reading教学设计
科目：英语 课题：Welcome to the unit & Reading 课时：1课时
教学目标与核心素养：
知识目标：获取与梳理出亚马孙雨林的基本概况及对人类的重要作用。
能力目标：学习构词法中一些表示否定的前缀及相关单词。
情感目标：赏析语篇的文体特征与修辞手法，探讨其与主题意义的关联，理性表达自己对环境保护的观点和看法，加深对主题意义的理解。
教学重难点
教学重点：获取与梳理出亚马孙雨林的基本概况及对人类的重要作用；学习构词法中一些表示否定的前缀及相关单词。
教学难点：赏析语篇的文体特征与修辞手法，探讨其与主题意义的关联；理性表达自己对环境保护的观点和看法。
课前准备：多媒体，黑板，粉笔
教学过程：
一、Pre-reading
1. Greeting
2. Leading-in
教师活动：教师让学生听课本中的英文歌曲，然后回答下列问题。
(1) What are the rhyming words in this song
harm/alarm; seas/trees; clean/green; above/love; pollution/solution
(2) How do you understand "harm" and "alarm" in this song
Harm" means something bad we have done to the Earth, including polluting soils and seas, cutting down too many trees, etc.
"Alarm" means the signal that warns us of the dangers of environmental damage, which urges us to find a solution to this problem.
学生活动：回答第一页的两个问题。
(1) What is the message of the song
Humans have done much harm to the Earth, and we have to take action to change this situation.
(2) What can you do to help protect the environment
We can use less paper and fewer plastic bottles and bags. Cutting down on electricity usage can also help reduce the air pollution that power stations create.
活动目的：调动学生学习积极性，同时引入文章主题。
While-reading
1. 教师活动：阅读文章前，引导学生思考下列问题。
What plants or animals do you know about What is special about them
Sloths are one of the slowest creatures on the Earth. They live hanging upside down in rainforest trees. Modern sloths are smaller than the extinct giant sloths which were as big as elephants and lived on the ground. Giant redwoods are impressive because they can grow as tall as 83 metres and as wide as 21 metres. You can drive a car through their trunks. They have been around since dinosaurs roamed the Earth but are now in danger of becoming extinct.
What do you think this script is about judging from the title and pictures
I think the script "The Amazon rainforest: a natural treasure" is about the Amazon jungle and the plants and animals found there. They are all natural treasures because they are valuable to the Amazon. The pictures show that the plants and animals living in the Amazon rainforest are unusual and beautiful. There are different kinds of animals that depend on the rainforest for shelter and food.
2. 学生活动：略读文章，完成P4活动A1。
Para. 1: Introduction to the Amazon rainforest
Para. 2: Basic information about the rainforest
Para. 3: Plant biodiversity; levels of the rainforest
Para. 4: Animal biodiversity; food chain
Para. 5: The rainforest's value to the human race; threats to the rainforest
3. 学生活动：仔细阅读文章，完成活动A2。
参考答案： (1) 8 (2) 6 million (3) 6,400 (4) 40,000 (5) 1,300 (6) 400 (7) 20% (8) 17%
4.教师活动：教师让学生组成小组讨论下列问题。
（1）What makes the Amazon rainforest a natural treasure according to the script
The Amazon rainforest is unique, beautiful and valuable. It contains 10% of all known species on the Earth. It produces over 20% of the planet's oxygen. Its wonderful plant and animal species have enabled humans to make amazing discoveries.
（2）What is your answer to the question at the end of the script Support your opinion with information from the script or other sources.
No. The Amazon rainforest is far too important for us to allow it to be destroyed. It helps maintain the balance of the ecosystem and provides our society with food and medicine.
（3）Are there any places in China with rich biodiversity like the Amazon rainforest What are they Introduce one to the class.
The Three Parallel Rivers of Yunnan Protected Areas is a natural property consisting of 15 protected areas. The property is of outstanding value for its diversity of landscapes and rich biodiversity. In its 15 different protected areas, there are over 6,000 plant species, around 200 mammal species and more than 400bird species. A large number of rare animals such as Yunnan golden monkeys, snow leopards and black necked cranes can be found here.
5.学生活动：思考并回答下列问题。
In the sentence "Yet there is one major danger to these irreplaceable plants and animals: us." (page 3, lines 33–34), why "us" is used instead of "human beings" here
By using "us" instead of "human beings", the author wants to emphasize that everyone of us is responsible for the damage to the rainforest. Therefore, all of us have apart to play in protecting it.
三、After-reading
1. 教师活动：Have students finish B1 on page 33.
参考答案：(1) variety (2) agriculture (3) survive (4) impact (5) due to (6) are broken down (7) beneath (8)thus
2. 教师活动：指导学生完成B3。
四、Summary
总结课上所学，梳理文章结构。
作业布置：
学生写一篇关于亚马逊雨林的文章，介绍自己了解的相关知识。