资源简介 选择性必修三 Unit3 Environmental Protection“Reducing water pollution in the Li River”教学设计一、文本来源语篇选自人教版选择性必修三Unit3Environmental Protection,标题为Reducing water pollution in the Li River。中文标题是“减少漓江水污染”,话题是水污染的防治,主题语境为“人与自然”。语篇属于Using language板块,其活动是Write a report on an environmental issue,即“写一份环境问题的报告”。二、文本解读 该文本是一篇关于漓江水污染治理的报告,报告是一种常见的应用文体,正文通常包括问题描述、问题原因分析、解决问题的措施及成效。本文一共分为4段,结构清楚。第一段主要引出漓江水污染的话题,第二段主要是描述漓江水污染的原因,第三、四段均描述了水污染治理的措施。在语言表达上,本文中出现了大量的提示“cause and effect”的逻辑表达,例如have negative effects on, suffer from, contribute to, in order to, lead to和cause等。三、本节课的设计理念本堂课的教学设计理念是基于活动观的英语学习。学生通过了解漓江水污染的成因与解决方式,同时基于课文中的语言资源,深入发现其中的语言现象(即含有大量的“因果关系”逻辑表达),在了解其功能性、多样性与丰富性的基础上,在新的语境中进行有效地巩固与迁移。四、教学目标1) 学生能够通过语篇的阅读了解漓江污染产生的原因以及相关治理的方式;2) 学生能够了解因果逻辑关系的作用,掌握“因果关系”逻辑表达并识别含有该逻辑关系的句子;3) 学生能够恰当使用“因果关系”的逻辑表达进行句子的连接、改写或创造,并撰写一份有关环境问题的报告。五、教学步骤Activity 1 Talking about the Li River教师展示两张漓江的图片,学生回答以下两个问题:1)What can you see in the pictures 2)Do you know that the Li River has been once polluted 【设计意图】通过图片引出本节课的主题——漓江。图片展示的是有青山环绕的、干净的、无污染的漓江,因此能够和本文中提到的被污染的漓江形成一个巨大的反差,自然地过渡到下一个活动。Activity 2 Focusing on Li River’s water pollution (cause & solution)教师提问以下两个问题,学生通过快速阅读进行回答。1) What led to the water pollution of the Li River 2) What measures were made to address the issues 【设计意图】该活动主要锻炼学生快速阅读能力以及信息定位能力。语篇第2至4段内容均较为简单,主要为污染原因(cause)与解决措施(solution)的列举,因此在该活动中学生完成信息梳理后,开始向下一个活动,即写作技能过渡。Activity 3 Analyzing sentences and enriching expressions 教师给出一个句子,引导学生关注句子中cause-effect的逻辑关系、提示这一层关系的语言表达以及其功能。What inner relationship do the expressions “led to” and “causing” suggest What is the function of this relationship Are there any different expressions used to suggest the cause-effect relationship 【设计意图】本活动关注句子的逻辑与语言,使学生了解句子内部有其自身的逻辑关系;引出cause-effect关系,并且补充相关丰富的“因果关系”信号词,能够使学生对该逻辑关系有一个宏观的认识。Activity 4 Locating the sentences with cause-effect relationship学生找出原文中其他包含cause-effect逻辑关系的句子,并指出其使用的语言表达。(Para 1) However, its reputation as a top destination has had negative effects on the river’s water quality.(Para 2) Previously, water quality in the Li River had suffered greatly from an increasing volume of tourists, many of whom frequently threw garbage into the river.(Para 2) Many tour boats contributed to the problem too.(Para 2) The growth in tourism also meant the local population rose rapidly, as well as the number of commercial and industrial enterprises.(Para 2) Water pollution levels increased, with more household and commercial waste ending up in the river.【设计意图】本活动充分利用课文中的语言资源,让学生识别相关包含“因果关系”的句子,充分感受“因果关系”信号词的多样性与丰富性。Activity 5 Connecting sentences using cause-effect expressions 教师设计有关于“水污染”的语境,提供三组句子,学生使用“因果关系”信号词将句子连接,使其更具逻辑性。第一组Countries develop fast and populations grow rapidly. (CAUSE)People’ demand for water resources increases. (EFFECT)Possible answer1: Since countries develop fast and populations grow rapidly, people’s demand for water resources increases.Possible answer2: Countries develop fast and populations grow rapidly, which causes people’s demand for water resources to increase.第二组People rely heavily on the use of chemicals to increase crop production. (CAUSE)Many water pollution problems occur. (EFFECT)Possible answer1: People rely heavily on the use of chemicals to increase crop production. As a result, many water pollution problems occur.Possible answer2: People’s heavy reliance on the use of chemicals to increase crop production brings about many pollution problems.第三组Household waste is frequently thrown into the rivers. (CAUSE)The living environment of fish species is worsening. (EFFECT 1)Human health is being threatened. (EFFECT 2)Possible answer1: Household waste is frequently thrown into the rivers. Consequently, the living environment of fish species is worsening and human health is being threatened.Possible answer2: Household waste is frequently thrown into the rivers, not only worsening the living environment of fish species, but also threatening human health.【设计意图】本活动中,教师创设了主题语境,学生针对“因果关系”信号词的使用进行操练,落实了知识的迁移。Activity 6 Focusing on report structure学生再次关注cause-effect的功能:分析“因果关系”是为了更好地对症下药,提出具有针对性的解决方案。因此,学生基于前一个活动的语境,讨论减少水污染的措施。According to the cause and effect, what suggestions would you like to come up with to deal with water pollution problems 【设计意图】语言内部的逻辑可以为我们解决问题提供思路。本活动关注“水污染”的解决措施,是对cause-effect逻辑关系的进一步延伸,即变成cause-effect-solution的模式,也就是一篇报告的格式与结构。Assignment1. 修改“倡议信”,使因果关系表达更具逻辑性与清晰性,使提出的措施更具针对性。2. 查阅当地“水污染”的相关内容,分析成因,并提出针对性解决措施,100字左右。注意上下文因果关系的表达。【设计意图】引导学生基于本节课所学内容,迁移所学知识;联系实际生活,整合运用语言,提升逻辑思考能力。六、本堂课具体亮点1)本节课在快速处理文本内容后,主要关注语篇中的语言现象——即因果关系逻辑词。并在新的语境中,充分训练学生使用该写作微技能的能力。2)通过因果关系逻辑词的介绍,学生一方面对读思课的课后作业“倡议信”写作进行修改,另一方面关注到了“环境问题报告”写作的注意事项,并尝试自己写一份水污染问题相关的报告。 展开更多...... 收起↑ 资源预览