Unit 5 Lesson 28 The Study of Living Things 教学设计

UNIT 5 Look into Science
Lesson 28: The Study of Living Things
首先，通过与同学们谈论生物学家达尔文引入本课内容。接着，利用图片学习本课节的词汇，并跟读练习。之后进入课文学习，首先通过听录音回答问题来了解课文大致内容，然后分段落阅读完成任务以达到对文章的理解，之后再次阅读来查找重要短语，接下来讲解课文中的重要知识点。之后，带领学生分析课文中的两个含定语从句的句子，并完成课本Let’s Do It! No. 2 的练习。接下来，通过玩游戏的方式进一步巩固对定语从句的掌握。最后，通过当堂达标的习题检测学生的掌握情况。
教学目标
通过本课节的教学，学生达成以下目标：
1. 知识目标
掌握单词：fantastic
接触单词：Chip Taylor, biology, butterfly, migrate, completely, grandchild, female, milkweed, chemical, puzzling
句型： The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.
But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.
2. 能力目标
(1)能读懂介绍蝴蝶的文章；
(2)学习定语从句。
3. 情感目标
培养探索自然的兴趣。
重点难点
1. 重点：掌握本课节的重点单词、短语和句型。
2. 难点：能读懂介绍蝴蝶的文章；学习定语从句。
教学准备
PPT 课件；本课节用到的录音。
授课时数
1课时
教学过程
Step 1 Warming up
1. Show a picture of Charles Robert Darwin. Have a free talk with students.
Q1: Do you know him
Q2: What do you know about him
2. Show the information of Charles Robert Darwin.
查尔斯·罗伯特·达尔文(Charles Robert Darwin，1809年2月12日—1882年4月19日)，英国生物学家，进化论的奠基人。曾经乘坐贝格尔号舰作了历时5年的环球航行，对动植物和地质结构等进行了大量的观察和采集。出版《物种起源》，提出了生物进化论学说，从而摧毁了各种唯心的神造论以及物种不变论。除了生物学外，他的理论对人类学、心理学、哲学的发展都有不容忽视的影响。恩格斯将“进化论”列为19世纪自然科学的三大发现之一，对人类有杰出的贡献。
3. Let students talk about:
(1) Would you like to be a biologist when you grow up Why or why not
(2) What mysteries of nature do you know about
Step 2 Presentation
1. Teach the new words butterfly, biology, migrate, fantastic, female, milkweed, grandchild, chemical, completely and puzzling by using the pictures.
2. Read the new words at least three times and try to remember them.
biology n. 生物学；生物
butterfly n. 蝴蝶
migrate v. 迁徙；移居
fantastic adj. 奇异的
completely adv. 完全地
grandchild n. 孙子（女）；外孙（女）
female n. 雌性的动物或植物；女子
milkweed n. （植）马利筋
chemical n. 化学物质
puzzling adj. 令人费解的
Step 3 Listening
Play the recording of the lesson for the class to listen and answer the question:
What’s the passage about
Answer: Butterflies.
Step 4 Reading
1. Get the class to read Para. 1 and complete the sentences about Dr. Chip Taylor.
Dr. Chip Taylor teaches _________ at a university in the USA.
He studies one kind of_________________________.
And ________________ about the butterfly have been drawing his attention.
Answers: biology, North American butterfly, fantastic facts
2. Get the class to read Paras. 1-2 and complete the facts about butterflies.
Fantastic facts about butterflies. · Just like a migrating bird, the butterflies travels about _______ kilometres south in ____________. · The butterflies always _________ to the same small piece of forest and ______ the winter there. · The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. · The females ____ eggs on only one plant: milkweed.
Answers: 4 000, fall/autumn, return/fly, spend, lay
3. Get the class to read Para. 3 and complete the worries of Dr. Chip Taylor.
Things that Dr. Taylor worries about. · In Mexico, people cut down the trees that the butterflies need to ____ on. · In the USA and Canada, farmers use chemicals that ____ milkweed.
Answers: rest, kill
4. Get the class to read Para. 4 and answer the following questions:
(1)How do Mexico protect the butterfly
(2)How do the United States and Canada protect the butterfly
Answers: (1) It has begun to protect parts of its forests.
(2) They have encouraged farmers to use fewer chemicals.
5. Get the class to read Para. 5 and complete the following question:
What are the two things that scientists can’t understand
Answers: 1. How do the butterflies know when to fly south
2. How do all the great-great grandchildren of the butterflies find the same forest in Mexico every year
6. Get the class to read the passage again, and find the following phrases:
Step 5 Analyzing
Find two sentences with attributive clauses from the passage, then analyze them.
Step 6 Practice
1. Join the sentences to make attributive clauses. (Let’s Do It! No.2)
For example:
1. I asked him to mail the letter. I wrote the letter to my cousin.
_____________________________________________________________
2. Yesterday I met a boy. The boy is a new member in our art club.
_________________________________________________________
3. Mary was carrying a bag. The bag cost her a lot of money.
____________________________________________________
4. Football is a team sport. Football is popular all over the world.
______________________________________________________
Answers:
1. I asked him to mail the letter which / that / 不填 I wrote to my cousin.
2. Yesterday I met a boy who / that is a new member in our art club.
3. Mary was carrying a bag which / that cost her a lot of money.
4. Football is a team sport which / that is popular all over the world.
Step 7 Playing a game
Work in groups. Each group should prepare some pieces of paper and divide them into three columns. Student A writes a person’s name in the first column, folds the paper and passes it to Student B. Student B writes a statement begin-
ning with “who”, folds the paper and passes it to Student C. Student C must finish the sentence and read it out loud.
Step 9 Homework
1. Recite the new words and expressions.
2. Try to recite the passage.
3. Preview Lesson 29.
当堂达标
用方框中所给单词或短语的适当形式填空
cut down , fantastic, draw...attention, butterfly, leave for, complete
1. Look! There are many　　　　 among the flowers.
2. If you　　　　 the trees, you would do harm to the environment.
3. It was a ___________ trip. We all enjoyed ourselves.
4. Sorry! I　　　　 forgot your birthday.
5.The new classmate 　　　　all the students’　　　　 .
6. Where are you ________________
答案: 1. butterflies 2. cut down 3. fantastic 4. completely 5. drew, attention
6. leaving for
板书设计
UNIT 5 Look into Science Lesson 28: The Study of Living Things
fantastic biology, butterfly, migrate, completely, grandchild, female, milkweed, chemical, puzzling The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.