内容正文:
Unit 4 Amazing Plants and Animals
Section B(2a—3c) 教学设计
课 题
Vocabulary in Use & Reading for Writing(Section B 2a—3c)
课 型
词汇与读写课(Vocabulary, Reading & Writing)
课 时
第5课时(45分钟)
核心素养目标
语言能力
能说出每组的"异类"词及理由;能正确添加后缀构成十个月单元词汇的名词形式;能完成 2c、2d 语境填空;能提取蓝鲸关键信息填表并用第一人称完成自述短文。
学习能力
能借助词典查证后缀与词义;能用表格先梳理信息再转述,养成"先梳理后表达"的习惯。
思维品质
能按语义场与词性双维度归类词汇;能在人称转换中保持信息的准确与条理。
文化意识
通过蓝鲸与青蛙的阅读渗透海洋保护与生态平衡意识。
教学重难点
教学难点:-ness/-ity 等后缀的准确选择;改写中人称、动词形式的一致性;表格信息的提炼而非照抄。
教学重点:四类后缀的构词规则;2c、2d 语境选词;蓝鲸信息表与第一人称自述。
语篇研读
【What】词汇部分:2a 圈出每组中不同类的词并说明理由(1. habit/height, size, weight;2. joy, happiness, fun/enjoy;3. angry, disappointed, sad/smart;4. appear, look, seem/watch;5. honey, milk, juice/bread);2b 加后缀 -ance, -(t)ion, -ness, -ity 构成名词(act→action, good→goodness, kind→kindness, appear→appearance, real→reality, imagine→imagination, connect→connection, popular→popularity, communicate→communication, important→importance);2c 用词框(appear, disappoint, imagine, store, weigh)的正确形式完成五句;2d 用词框(however, important, land, planet, protect)完成青蛙短文。读写部分:3a 阅读蓝鲸短文并完成表格(Weight—as much as 200 tons;Where they live—all oceans except the Arctic Ocean;Food—some of the tiniest animals in the ocean, around four tons a day;How long they live—up to 90 years;Importance—dies at sea→becomes food for many sea animals→helps create a lively and healthy ecosystem);3b 以第一人称改写第一段(Hello everyone! My name is Billy the Blue Whale. I am…);3c 依据课文完成蓝鲸自述短文。
【Why】2a 的归类与 2b 的词形转换把词汇学习从"认词"推进到"构词";蓝鲸自述把说明文转为人称化表达,训练视角转换与信息重组,为 Project 海报制作储备语言。
【How】按"归类圈词→构词规则→语境选词→语篇填空→表格提取→第一人称改写→成文"推进;2b 用词典查证后缀;3b—3c 以 Billy 的口吻重构课文信息。
学情分析
学生对词性转换有初步意识,但后缀选择的准确性不足(-ness 与 -ity 混用);说明文表格提取时易抄整句而非提炼要点;第一人称改写时人称与动词形式易出错(I weigh / I live)。
教学过程
教学环节
教师活动
学生活动
Step 1
Work on 2a
归类圈词
(6’)
①出示五组词,组织圈出不同类的词并说明理由;
②核对(参考答案:1. habit(其余为身体测量维度);2. enjoy(动词,其余为名词);3. smart(褒义性格词,其余为消极情绪);4. watch(实义动词,其余为系动词);5. bread(固体食物,其余为液体));
③请学生说明判断角度(词性、语义场)。
①逐组圈词并思考理由;
②核对订正;
③总结归类判断的两个角度。
Step 2
Work on 2b
构词规则
(8’)
①讲解四类后缀:-ance/-ence(appearance)、-(t)ion(action, connection, communication, imagination)、-ness(goodness, kindness)、-ity(reality, popularity, importance);
②组织查词典完成十词并核对(参考答案:1. act→action 2. good→goodness 3. kind→kindness 4. appear→appearance 5. real→reality 6. imagine→imagination 7. connect→connection 8. popular→popularity 9. communicate→communication 10. important→importance);
③点拨拼写细节:imagine→imagination(去 e 加 -ation)、communicate→communication。
①听讲四类后缀的来源与含义;
②查词典完成构词并核对;
③记录拼写变化要点。
Step 3
Work on 2c
语境选词
(6’)
①出示词框(appear, disappoint, imagine, store, weigh)与五句,组织完成:1. I felt ________ when my favourite flowers died. 2. After the rain, some mushrooms ________ in the garden. 3. In my hometown, people often use bamboo baskets to ________ food. 4. What did you put in your luggage? It ________ a ton. 5. I can’t ________ my life without my pets. They mean a lot to me.;
②核对(参考答案:1. disappointed 2. appeared 3. store 4. weighs 5. imagine);
③讲评 2b 构词在 2c 中的复现(disappointed 为动词过去分词作形容词)。
①读句判断所需词形;
②完成五句并核对;
③联系 2b 体会词汇复现。
Step 4
Work on 2d
语篇填空
(6’)
①出示青蛙短文与词框(however, important, land, planet, protect),组织通读后填空;
②核对(参考答案:You may not realize it, but frogs play an important role in our planet ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to protect farms by eating insects. However, not everyone understands their importance in nature. Frogs can live on land and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem.);
③讲评 however 的转折衔接与 importance 的名词形式。
①通读短文把握大意;
②完成填空并核对;
③记录 however 与词性转换要点。
Step 5
Work on 3a
读文填表
(7’)
①出示蓝鲸课文,组织阅读并完成表格(参考答案:Weight—it can weigh as much as 200 tons;Where they live—in all oceans except the Arctic Ocean;Food—they eat some of the tiniest animals in the ocean, around four tons a day;How long they live—up to 90 years;Importance in nature—when it dies at sea, it becomes food for many kinds of sea animals and helps create a lively and healthy ecosystem);
②提示提取要点短语而非抄整句。
①阅读课文,定位五项信息;
②用要点短语填表;
③同桌互查表格。
Step 6
Work on 3b—3c
第一人称改写
(10’)
①出示 3b 任务与开头:Hello everyone! My name is Billy the Blue Whale. I am…,组织用第一人称改写第一段(参考示例:Hello everyone! My name is Billy the Blue Whale. I am the largest and heaviest animal on earth. I can weigh as much as 200 tons. Many people like watching me swim, and they think it is one of the most beautiful things to see.);
②组织依据 3a 表格完成 3c 自述短文(参考框架:I’m heavy, but I eat some of the tiniest animals in the ocean—around four tons a day. I live in all oceans except the Arctic Ocean. I can live up to 90 years. When I die at sea, I become food for many animals. I play an important role in our world, so please protect us!);
③小组讨论:What did you find most interesting about blue whales? Why is it important to protect them?,选 1—2 篇朗读展示。
①借开头句改写第一段;
②依据表格完成自述短文;
③参与讨论并朗读展示。
Step 7
归纳总结
布置作业
(2’)
①依托板书小结后缀构词与自述写作要点;
②发放自评卡,组织勾选达成项;
③布置分层作业并说明要求。
①跟随板书口头归纳;
②在自评卡上勾选达成项;
③记录分层作业要求。
板书设计
Unit 4 Amazing Plants and Animals — Section B (2a—3c)
后缀:-ance(appearance) -(t)ion(action) -ness(kindness) -ity(reality)
蓝鲸:200 tons all oceans except the Arctic Ocean
up to 90 years help create a lively and healthy ecosystem
自述:I am the largest and heaviest animal on earth.
作业设计
本课作业围绕构词巩固与蓝鲸自述完善设计。
【基础·必做】①整理 2b 十个名词并抄记;②把 3c 自述短文修改誊写一遍。
【提升·选做】用 appear, connect, imagine, popular, important 的名词形式各写一句。
【拓展·挑战】查阅资料给蓝鲸自述再补一条趣事,保持第一人称口吻。
巩固检测(当堂完成)
一、写出下列单词的名词形式。
1. act→________ 2. kind→________ 3. important→________ 4. appear→________ 5. popular→________
二、用所给词的适当形式填空。
1. I can’t ________ (imagination) my life without music.
2. Frogs help to ________ (protection) farms by eating insects.
3. The box is very heavy—it ________ (weigh) about 20 kilos.
巩固检测参考答案
一、1. action 2. kindness 3. importance 4. appearance 5. popularity
二、1. imagine 2. protect 3. weighs
教学反思
①后缀选择中 -ness 与 -ity 的混淆是否解决;②表格提取是否摆脱了整句照抄;③第一人称改写中动词形式的出错率;④青蛙短文中 however 的衔接是否被学生注意。
学科网(北京)股份有限公司
$