Unit 4 Amazing Plants and Animals Section B (2a-3c)教案人教版（2024）八年级上册

第5课时　Section B (2a-3c)
一、教学目标
1.能够辨别词汇类别,掌握通过添加词缀构成名词的方法,准确运用重点单词完成句子和短文。
2.能够从文本中提取蓝鲸的主要信息,以蓝鲸的视角进行第一人称的短文写作。
3.培养学生的词汇运用能力、信息提取能力和写作能力。
二、核心语言知识
1.核心词汇:
单词:
happiness;disappoint;ton;role;climate;ocean;except;tiny;lively
短语:
play a role (in);live up to
2.核心句式:
(1)Blue whales live in all oceans except the Arctic Ocean.
(2)Blue whales play an important role in our world,so we must protect them.
3.教学重难点:
(1)辨别词汇类别,掌握通过添加词缀构成名词的方法,准确运用重点单词完成句子和短文。
(2)形容词、副词在日常生活中的运用。
(3)用第一人称生动地改写段落, 理解蓝鲸在生态系统中的重要作用。
三、教学过程
学习活动 效果评价
◆Step 1　Lead-in Show a short video about different objects with their measurements (height,size,weight)on the screen.After watching,ask students some simple questions,like “What can you remember about the measurements in the video ” 观察学生对问题的反应,看他们是否参与其中。
设计意图:激发学生兴趣并激活他们关于评价动植物特征的词汇。
◆Step 2　Presentation Work on 2a and 2b 1.Ask students to observe the vocabulary in 2a,circle the odd ones out,and provide reasons. 2.Explain the rules for forming nouns with the suffixes -ance,-(t)ion,-ness,-ity. 3.Students complete the exercises in 2b independently,the teacher walks around to provide guidance.Finally,the class checks the answers together and the teacher explain the key words. 观察学生是否能准确辨别词汇中的不同类项并给出合理理由,评估其对词汇的理解能力;检查学生对名词后缀规则的掌握情况,并通过集体订正和讲解关键词,给予指导。
设计意图:通过2a和2b的内容培养学生的词汇辨析能力和帮助学生系统掌握构词法,提升其词汇积累和语言运用能力;通过提供针对性指导,确保学生扎实掌握知识点。
◆Step 3　Practice Work on 2c and 2d 1.Students complete the exercises in 2c and the fill-in-the-blank exercise for the short passage in 2d independently. 2.Pairs correct each other's work within their groups,and the teacher provides explanations. 教师通过观察学生独立完成练习的过程和组内互评的互动情况,评估学生对词汇的掌握程度。
设计意图:此练习可以促进协作学习和同伴互评,这可以加深学生对材料的参与度,并提高他们自我评估和纠正作业的能力。
◆Step 4　Pre-reading Play a short video about blue whales. T:What do you see What do you want to know about blue whales Let students share their ideas. 观察学生的讨论积极性与阅读期待。
设计意图:直观激发兴趣,激活已有知识。
◆Step 5　While-reading Work on 3a 1.Fast-reading Students read the text quickly and answer:What's the text mainly about 检查学生对文章主题的概括的准确性。
设计意图:训练略读,把握主旨。
2.Careful-reading Students read the text carefully and complete the table in 3a.Guide them to find: Weight:as much as 200 tons Where they live:all oceans except the Arctic Ocean Food:Some of the tiniest ocean animals How long they live:up to 90 years Role in ecosystem:food for other animals,create a lively and healthy ecosystem 检查表格填写的准确性。
设计意图:培养精读与细节整理能力。
◆Step 6　Post-reading T:Work in groups to say something about how to protect blue whales by answering the following questions: 1.Why are blue whales endangered (1)Because the temperature in the ocean is becoming higher and higher. (2)Because there is more pollution in the ocean. (3)Because humans kill blue whales to get the fat under their skin. 2.How to protect blue whales (1)Ask the government to make laws to stop killing. (2)Students can make some posters to tell the public the importance of blue whales. (3)Do more research on them. 评估学生的观点表达与小组讨论深度。
设计意图:促进批判性思维与语言输出,强化保护意识。
◆Step 7　Writing Work on 3b The teacher guides students to review the characteristics of blue whales from the text in 3a,and then to complete the part of 3b in the first person. 观察学生是否能根据蓝鲸的特点以第一人称完成写作,针对不懂的学生给予特定的写作提示。
设计意图:通过回顾蓝鲸的特点和讲解第一人称写作技巧,帮助学生明确写作任务的要求,培养学生的创造性写作能力。
板书设计 Unit 4　Amazing Plants and Animals 第5课时　Section B (2a-3c) 1.构词法之名词后缀:-ance,-(t)ion,-ness,-ity 2.How to describe blue whales
课堂评价
作业布置
必做: Complete a short self-introduction from the perspective of Billy the Blue Whale based on the writing framework provided in class.The passage should include the characteristics of blue whales (such as weight,habitat,food,lifespan,etc.)and their role in the ecosystem. 选做: Do some research on other endangered marine animals and write a short report about their living situations and the importance of protecting them.
教学反思
　　在整个单元的教学过程中,教学活动设计丰富多样,涵盖知识回顾、词汇辨析、写作练习等多个方面,有效提升了学生的语言综合运用能力。在词汇教学中,从辨别词汇类别到学习名词后缀构词法,学生的词汇积累和辨析能力逐步提高。阅读与写作环节,借助对蓝鲸文本的学习和第一人称写作练习,培养了学生信息提取、逻辑思维和创造性写作能力。