Unit 5 Revealing nature Understanding ideas 教案-高一下学期英语外研版（2019）选择性必修第一册.docx

Unit 5 Revealing nature Understanding ideas教学设计科目：英语 课题：Understanding ideas 课时：1课时教学目标与核心素养：1带领学生略读课文，熟悉话题语境，获取课文的主旨大意；2带领学生细读课文，进行文本解读，感知叙述类文本的结构及语言特点，并按照事件发展顺序梳理Darwin的发现之旅；3引导学生阅读课文，在语篇中学习和掌握与话题相关的词汇，并能运用所学词汇进行交流；4引导学生联系生活实际，从Darwin的故事中体会探索的艰辛，学习科学家的科学精神和创新精神，并以此指导自己的实际学习生活。教学重难点教学重点：带领学生通过略读和精读，获取课文大意，引导学生感知课文的结构和语言教学难点：引导学生基于课文内容联系生活实际，思考生物进化对于人类的意义课前准备：多媒体，黑板，粉笔教学过程：一、Pre-class1. Greeting2. Leading-in教师活动：教师通过课件展示达尔文的相关视频，激发学生的兴趣。背景信息Charles Darwin and his Theory of Evolution Charles Darwin (18091882) was an English geologist and naturalist. In his famous book On the Origin of Species, Darwin proposed the theory that organisms (individual life forms) evolve extremely slowly. He stated that the organisms that were better suited to their environments would survive and pass on their favorable characteristics to the next generation, while the less suitable organisms would gradually die out. He called this process "natural selection".二、While- class学生活动：学生完成活动1。Look at the evolutionary tree and answer the questions.1 What species do you recognise in the picture?2 What factors can cause the process of evolution?教师引导学生看图片，解读该图片所承载的语言信息及知识信息，初步导入话题。第一步：引导学生进行头脑风暴，激活关于动植物的词汇，教师收集答案并将这些词汇呈现在黑板上。第二步：引导学生看图片，根据图片内容完成问题1。请学生对比头脑风暴中提到的词汇，寻找已知词汇，然后学习相关生词。第三步：学生分组，进行小组讨论，尝试回答问题2。参考答案：1 Paramecium, earthworm, snail, crab, fish, tortoise, bird, horse, human, frog, algae, moss, fern.2 Students own answers.学生活动：完成活动2。Read the passage and talk about your understanding of the title.教师以问题为导向，引导学生带着任务阅读课文，理解课文。第一步：学生独立进行快速阅读，通过图片、标题预测课文内容。第二步：学生分组，讨论对课文标题的理解。第三步：各小组组内核对答案，交流有效的阅读方法与技巧。学生活动：完成活动3。Choose the main idea of the passage and give your reasons.1 Darwins interest in various living things made him a great naturalist.2 Darwins journey on the Beagle inspired his Theory of Evolution.3 Darwin went on a journey to confirm his theory that humans had evolved over time.参考答案：2教师引领学生从语篇类型入手，了解课文的结构和语言特点，并利用此活动检验学生初读之后对课文内容的理解和把握情况。第一步：学生独立阅读课文，选出文章的主旨大意。第二步：请个别学生说出答案并陈述理由，由全班核对答案。学生活动：完成活动4。Number the puzzle pieces in order. Organise information from the passage and complete them.教师带领学生进一步梳理文章的结构，引导学生理解，掌握与达尔文的发现之旅相关的细节，检验学生对课本脉络，行文逻辑，细节内容及话题相关语言的理解和整合情况。第一步：引导学生关注puzzle pieces中的小标题，明确活动意图。第二步：请学生根据小标题内容梳理文章结构，给puzzle pieces排序。第三步：请学生精读课文，找出课文中相应的细节内容，完成puzzle pieces。第四步：带领学生核对答案，在课文中找出相应的信息。第五步：请学生根据时间线索及细节内容对Darwin的发现之旅进行简单的复述。教学提示教师还可以组织学生进行头脑风暴，两人一组进行一段穿越时空的对话，其中一名学生扮演Darwin，另一名扮演记者，通过访谈形式完成活动4中对进化论发表时间的讨论。参考答案1 On his journey Darwin studied various living things in their natural environments and samples of the plants and animals he had collected. He noticed that some species of animals were very similar to each other.2 Generate ideasDarwin asked the questions: How did different species come to exist? Maybe animals evolved as they adapted to their changing environments?3 Look for more evidenceOn the Galpagos Islands: He noticed that there was a difference between the finches on each of the islands. It seemed the beaks had evolved according to what food was available on that particular island.4 Develop ideasDarwin suspected that the finches had evolved from a common ancestor, which had arrived on the islands a long time before and it had slowly evolved into many new species.5 Propose a theoryThe Theory of Evolution: living things, including humans, had evolved from lower forms of life.三、After-classThink & share 1 Why were many people "shocked" by Darwins theory?2 What kind of person was Darwin according to the passage?3 How do you think the human species will evolve in the future?4 What have you learnt about the spirit of scientific exploration? How can this spirit help you in your life and studies?教师提供必要的支持，鼓励学生在深入理解文章主题的同时，联系自身实际，进行知识和思维能力的迁移。第一步：学生分组讨论本环节问题的答案。必要时，教师可以补充更多背景知识。第二步：请个别学生回答问题，其他学生进行补充或展开自由讨论。教师可进行点评，引导学生深入思考Darwin不畏艰难、勇敢探究的科学精神，并结合自身实际思考如何学习并继承这种精神。参考答案1 At that time, people believed that all species had appeared on Earth at the same time and had not changed since, but Darwins theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many people.2 Darwin was a determined man. He had strong curiosity and interest in science and was good at thinking and making discoveries.3 Students own answers.4 Students own answers.四、Summary 总结课上所学