| 课题 | Unit 4 Global warming Period1 warming up pre-reading and comprehending | |
| 教 材 学 情 分析 | 教材分析：“阅读”(Reading) 部分是一篇杂志文章，主要讲述了地球温度上升的现象和原因。20世纪中，地球的温度上升了华氏1度。这看上去是一个很小的数字，但相对于自然界的其他现象来说，这个增长速度是迅猛的。这种现象是自然发生的还是人为的？这个问题引起激烈的争论。许多科学家认为，这种变化是人类燃烧矿物燃料所致。这些物质的燃烧产生以二氧化碳为主的温室气体。正因为自然界有温室气体的存在，地球才不至于很冷。但大量排放二氧化碳会使地球普遍升温。对于地球升温，科学家有不同的看法。有些科学家认为，这个问题很严重。地球升温会导致海水上涨、风暴、干旱、饥荒、物种毁灭和疫病等。也有科学家认为，地球升温有利于改善人类生活，比如，庄稼长得更快、产量更高等。文章最后以开放性的问题结尾要求读者思考：对于全球变暖，人类要不要采取措施？ 学情分析：阅读比较难，词汇句子，都难以理解，所以教师要多做提示。 | |
| 教学目标和教学内容 | Teaching goals 教学目标 1. Target language 目标语言 a. 重点词汇和短语 compare, phenomenon, graph, fuel, trap, data, climate, catastrophe, consequence, range b. 重点句式 There is no doubt that the earth is becoming warmer. P26 Without the‘greenhouse effect’, the earth would be about thirty-three degrees Celsius cooler 2. Ability goals 能力目标 Enable the students to talk about the causes and effects of global warming. 3. Learning ability goals 学能目标 Help the students learn how to talk about the causes and effects of global warming and express ideas about what people should do about it. 教学内容： Teaching important points教学重点 Help the students learn how to debate over the topic “We should do nothing about global Teaching difficult points 教学难点 Enable the students to learn the writing skills of the text and get a better understanding of articles of this kind. | |
| 教学方法Teaching methods Listening, reading and group work. 教学手段：学生讨论，课件 | ||
| 教学过程 | 导 入 设 计 | 启发式设问： T: 众所周知，全球在变暖，这是为什么？as we know, the earth is becoming warmer and warmer,why? Ss: 因为温室气体Because of greenhouse gases T: 非常好，那么什么是温室气体呢yes very good ,what are greenhouse gases Ss:学生开始回答各种各样的答案，这个时候老师开始展示图片，告诉学生温室气体有哪些。和问温室气体是好还是坏呢，学生回答可能各种各样，这个时候展示下一个图片。开始进入课文。 |
新课设计 | Step Ⅲ While-reading Fast-reading Get the students to read the passage fast and meanwhile help the students form a good habit of reading. （让学生养成自己阅读的习惯） T: 3minutes later can you match the general idea and writing ways. Part | Main ideas of each part |
| Part1 | Introduce global warming | |
| Part2 | How global warming come about | |
| Part3 | List 2 different attitudes among scientists | |
| Part4 | It`s up to reader to think and decide whether people should do something about global warming or not | |
Step Ⅳ Comprehending
Let 6 students form a group to read the passage again to find out the answers to the questions in Exercises 1 and 2.
T: let’s listen to the tape. While listening, pay more attention to specific information. Then read the whole passage by yourselves. Try to find out the answers to questions in Exercises 1 and 2. You may work in groups.
Part1. 1.who writes the articles?
2.what rose about one degree?
Part2. 1.how global warming happen? 1_____ 2______
2.what are the greenhouse gases? 1_____ 2______3______
3.what are the two graphs about?
Part3. 1.what are the effects of global warming? 1_____ 2______3______
2.which three scientist are mentioned?
Dr foster:_____________________________________________
George hambley:_______________________________________
Keeling:______________________________________________
Practise(选择题训练)
Summary：从这篇课文里学到什么了呢
1.the earth is becoming warmer warmer
2.global warming could have terrible effects
Step Ⅵ Homework
1. Read the passage again and review the new words and expressions.
| 2. Prepare the debate in groups. | ||
| 学生活动：Ask students to discuss the text structure | ||
| 学法指导： 1.task –based teaching and learning 2.cooperative learning 3.discussion | ||
| 习题设计板书设计 | 板书设计： Part | Main ideas of each part |
| Part1 | Introduce global warming | |
| Part2 | How global warming come about | |
| Part3 | List 2 different attitudes among scientists | |
| Part4 | It`s up to reader to think and decide whether people should do something about global warming or not | |
| 课后反思： | ||
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