Unit 3 Environmental Protection Reading and Thinking
课题 Climate Change Requires the World’s Attention
教科书 书 名:英语选择性必修三
出版社:人民教育出版社
教学目标
学生通过本课时的学习,能够:
1.通过快速阅读,抓取段落关键词,获取文本基本信息和文本主线;
2.通过细读和绘制图表,掌握全球变暖的原因、危害和措施的相关信息;
3.通过进一步思考,培养环境保护意识,明确作者写作意图;
4.通过分析文本语言特点,明确说明文的语言特征;
教学内容
本文是一篇说明文,文本结构清晰,按照“现象、案例、原因、危害、措施”的逻辑顺序展开,环环相扣,步步深入。第一段首先用统计图直观呈现气候现状:全球气候变暖。第
二段用饿死的北极熊的例子和照片来具体说明气候变暖的影响,从而帮助读者初步感知气候
变暖给地球带来的负面影响。文本第三段介绍两种温室效应,探讨气候变暖背后的原因。第
四段揭示气候变暖的后果,即极端天气、自然灾害的频次增多,造成生命和财产的巨大损失。
第五段,亮出观点,呼应标题,并号召全球携起手来,采取相应对策,减少碳排放。同时,
也号召个人减少生活中的碳排放,宣传气候变化的知识。
教学重点:
了解文本主要内容,梳理文本结构;用示意图展示温室效应的原理;启发和鼓励学生改变生活方式,减少碳排放;
教学难点:观察并掌握说明文的结构特征和语言特征。
教学过程
Activity 1:Lead in
Watch a video clip about: What happened to the Earth”
设计说明:通过观看视频,让学生了解地球发生了什么,以及背后的原因,从而激发学生的兴趣,激活学生的背景知识。
Activity 2:Discussing the graph
Look at the graph and think about the weather Change.
It shows the change in the Global Surface Temperature between 1920 and 2016. The earth is becoming warmer and warmer.
Global warming
设计说明:学生通过描述图表,思考气候发生的变化,激发学生探究的兴趣,培养他们“看”图说话的能力,为接下来的阅读做好准备。
Activity 3: Fast reading.
Read for main idea & text type
①What type of writing is this passage
A. Argumentation B. Narration C. Exposition D. Advertisement
②In which part of a newspaper or magazine may we find this passage
A. Entertainment B. Economy C. Education D. Environment
Skim the passage and use some key words and phrases to clarify the topic sentences of the text.
设计说明:引导学生通过略读确定每段的关键信息,了解每段表达的主题句,梳理
文章结构。
Activity 4: While-reading: read for the structure and main idea:
1. Match the main idea with each part.
Para 1-2 The solutions to reducing greenhouse gas emissions.
Paragraph 3 The consequences of the rise in temperature.
Paragraph 4 The causes of the increase in the global average surface temperature.
Paragraph 5 The evidence of dramatic climate change that had an impact on Earth's ecology.
2. Read for details
1 The following reasons account for the death of the polar bear. Read paragraph 2 and put them in a correct logical order
Low sea-ice level starvation longer food-seeking travel lack of food
climate change
②Read paragraph 3 and fill in the table to find the causes
设计说明:引导学生通过绘制示意图,学习表达信息的新方式,内化所学语言内容;
引导学生通过表格的形式,梳理自然温室效应和人工温室效应的区别。
③Ss read paragraph 4 to find the consequences.
What are the consequences of global temperature rise Draw a diagram to present the consequences.
设计说明:引导学生带着目标阅读文本,获取相关信息,并通过绘制思维导图,对信息进行梳理和表达,同时将这些信息与自己在活动 2 中对于全球变暖后果的思考进行比较,拓展思路。提升学生获取与运用信息的能力;培养学生绘制思维导图的能力。
④Ss read paragraph 5 to find the solutions.
What solutions are suggested in the last paragraph Draw a diagram to present the solutions
设计说明:引导学生探究问题解决方案,获取相关信息,并通过绘制思维导图,对
信息进行梳理和表达。并进行思考自己能做的事,为后续讨论活动做铺垫。提升学生思
考能力和解决问题的能力。
Activity 5: Post reading
①Discussion:
As a student, what can we do to protect the environment in our daily life
②课文语法填空
What is causing the increase in the global average surface temperature Climate scientists
often mention a key climate process 1_______(call) the “greenhouse effect”, which has two
common meanings: the “natural” greenhouse effect and the “man-made” greenhouse effect. The“natural” greenhouse effect refers to the fact 2______ heat from the sun enters the atmosphere and warms Earth’s surface as short-wave radiation. The heat 3____________(release) back into space at longer wave lengths. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earth’s climate warm and habitable. 4__________ this process, Earth could not sustain life. However, the “man-made” greenhouse effect has now become 5___ big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth’s surface temperature
6_________(rise) quickly. There is strong and comprehensive evidence that the rise in temperature 7_________(lead) to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. Climate 8 ___________(scientist) have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a 9________ (high) price to pay. In fact, news reports are 10___________(frequent) broadcast about extreme rainstorms and heatwaves causing deaths and economic losses.
设计说明:
引导学生细读文本,思考和探究文本的语言风格,培养学生思辨能力,提升学生的语言分析能力。
Activity 6: Assignment
假如你是李华,你非常关心目前的全球变暖问题。请你写一封倡议信给学校的同学们,提倡“低碳生活”(low-carbon life)。要点如下:
1)说明全球变暖问题,简述其原因;
2)提出具体措施;
3)发出倡议。
设计说明:让学生写一篇关于全球变暖有关的倡议信,内化所学语言,提升环境保护的意识。
教学反思
本课 Reading and Thinking , 选自新人教版选择性必修三第三单元Environmental Protection 中的语篇 climate change requires the world’s attention。基于对文本和学情的分析,教学分为以下四个部分:Lead-in,Pre reading, While reading, Post reading。教学设计按照学习理解、应用实践、迁移创新三类活动层层递进。
设计思路如下:创设情境导入主题,以学生已知近期天气急剧变化为切入点;关注文本体裁,逐层梳理文章结构;有效教授了学生各种阅读策略,如预测、扫读、略读、细节查找、推理判断等引领学生获取并概括信息,深度理解文本;指导学生读懂并使用可视化工具(图表、结构图、思维导图等)概括、整合、重构信息;通过提问、小组讨论、案例分析等多样化方式,发展学生批判性思维,提高团队协作能力,鼓励学生将所学应用于生活;积极践行环保意识和理念,培养学生人类共同体意识。
通过这节课的学习,学生对于全球变暖这一现象有了更为深刻的了解,掌握了说明文的文体特点,能够更全面且具有批判性的表达自己的观点,深入思考并呈现了自己能为环境的可持续发展做出的努力,实现了迁移创新,并为本单元接下来的 writing 和 project 课程做了相应的铺垫。
当然本课存在一定的不足。个别学生预习准备不充分,导致一定的阅读障碍,今后在备课中应注意加强个别辅导,帮助学生克服语言障碍,提高阅读质量和效率。根据学生情况适时调整教学策略,从而进一步提升教学质量、促进学生全面发展。