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冀教版英语九年级Unit 5
Lesson 29 DNA-The Story of You
教学设计
课题 Lesson 29 单元 Unit 5 学科 English 年级 9
教材分析 This lesson is focused on DNA. From this lesson, the students can learn some knowledge of DNA. Ask students to discuss the questions: Do they look same Do they different Why It is helpful for them to know about the nature, science, and our body.
学习目标 1.Knowledge objectives: To master words and expressions: generally, twin, clone, not only...but also, blueprint, identical, egg, identify.2.Skill objectives: 1)To improve the students’ ability of reading. 2)To understand the text about DNA.3.Emotional objectives: To learn some knowledge of DNA through learning this lesson.4. Thinking quality objectives: To know about the nature, science, and our body. You are unique in the world.
重点 To understand the meaning of the text and recite the key points.
难点 To retell the text.
教学过程
教学环节 教师活动 学生活动 设计意图
导入新课 Step 1. Lead inLook the pictures and talk about the questions: 看图谈论问题 激发兴趣并引入新课
讲授新课 Step 1. Presentation1.Look and say2.New wordsStep 2. PracticeNumber the words:Step3. Reading task1. Listen to the text and fill in the blanks:2. Read the text and judge the sentences:3. Do they have the same DNA Please judge according to the text.4. Retell the text in groups according to the following information.Step4. Let’s do1. Read the lesson and answer the questions.2. Fill in the blanks with the phrases in the box.3. Complete the passage with the sentences in the box.4. Is it a good idea to change the DNA of the food we eat Some people say doing this makes our food better. Others think it’s too dangerous. Search the Internet for information, discuss and write down your ideas.Step5. Language points1. far more complex2. except for3. not only … but also …Step6. ExerciseFill in the blanks according to the Chinese words or the first letter.1)We should read the i__________ before we take the medicine. 2)Mary and Rose are sisters and they were born on the same day, so they are t________．3)His mother asked him to r________ what she said. 4)In __________（通常的）, English people are used to talking about the weather when they meet.5)Every month, the old man’s __________（孙子）visit him.2.Choose the correct answers.1)Is the accident ________ you A．related to B．relate to C．relating D．related2)I think this book is far __________ than those ones. A．the more interesting B．more interestingC．most interesting D．the most interesting3)—— Will you fix up the machine according to the _____, David —— No problem.A. instructions B. inventionsC. invitations D. interviews4)——Which film do you like best ——The Martian. It ________ shows a lot of imagination ________ has a sense of humour.A．too; to B．neither; norC．either; or D．not only; but also5)Ben’s composition is almost perfect ________ several spelling mistakes. A. except B. except for C. besides D. besideStep 7 RefectionScience is the most important people in your life，the most beautiful and the most need.Step 8 HomeworkWrite a passage about DNA, try to tell what it is, where it is from, what things you show your parents’ DNA.Preview the words and phrases of Lesson 30. 看图学习新单词及句子单词操练听课文并填空读课文并判断根据课文判断根据所给信息复述课文完成课本上和课文相关的练习讲解课文中的重点语法完成习题培养学生对科学研究的兴趣完成家庭作业 通过展示的图片掌握课文中的新词汇巩固掌握新词汇，为阅读课文做准备有任务的听读练习，提高听读水平巩固和掌握文中重点词汇用法及课文内容对文章中出现的知识点，及时指出并讲解，为以后做题奠定基础日积月累掌握做题技巧情感教育课后巩固
板书 Unit 5 Look into ScienceLesson 29 DNA－The Story of YouWords:DNA, blueprint, twin, general, repeat, complex, pattern, identify, related, grandson, granddaughter, instructionPhrases:in general, except for, not only…but also…, be related of, billions of 直观地展示本课重点语法内容
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冀教版英语九年级Lesson 29导学案
学生姓名 班级 序号
课题内容 Lesson 29 DNA-The Story of You
教材分析 This lesson is focused on DNA. From this lesson, the students can learn some knowledge of DNA. Ask students to discuss the questions: Do they look same Do they different Why It is helpful for them to know about the nature, science, and our body.
学习目标与核心素养 1.Knowledge objectives: To master words and expressions: generally, twin, clone, not only...but also, blueprint, identical, egg, identify.2.Skill objectives: 1)To improve the students’ ability of reading. 2)To understand the text about DNA.3.Emotional objectives: To learn some knowledge of DNA through learning this lesson.4. Thinking quality objectives: To know about the nature, science, and our body. You are unique in the world.
学习重点 To understand the meaning of the text and recite the key points.
学习难点 To retell the text.
说一说你所了解的和DNA有关的科学知识，讨论并写在下面横线上。
___________________________________________________________________________ ___________________________________________________________________________
翻译以下单词及短语：
DNA________ blueprint _______ twin _______ general ______
repeat _______ complex ________ pattern _____ identify ______
related ______ grandson _______ granddaughter___ instruction ____
探究点一：
1. Listen to the text and fill in the blanks:
1) Generally speaking, a __________ is a drawing.
2)________ for identical twins, each living thing has its own unique DNA.
3)Our DNA come from our ________.
4)A person’s DNA is in every part of his or her _______.
2. Read the text and judge the sentences:
1)DNA is the pattern our body uses to build itself. ( )
2)Each living thing has it’s own unique DNA. ( )
3)From your DNA, scientists can identify you and people related to you. ( )
4)Our bones do not have the same DNA as our skin. ( )
5)Building a house is far more complex than building a living thing. ( )
3. Do they have the same DNA Please judge according to the text.
1) I my twin brother
2) I my grandparent
3) my hair my blood
4) I my brother’s skin
5) my mother my sister
6) my father my mother
4. Retell the text in groups according to the following information.
DNA is …
Except for some twins, every living thing has …
Some health problems can be caused …
In the future, scientist might be able to …
There are copies of your …
From you DNA, scientists can identify …
5. 完成课本75页活动1、2、3、4.
探究点二：Language points
1.far more complex：复杂得多
________前可以用much, even, still, far, a bit, a little, a lot等词加以修饰。
中考链接：
We all like Lucy as she is always thinking ________ of others than herself.
A. less B. much more C. much D. Better
（山东泰安）
2. except for：除了……以外（表示不同类事物间的排除关系）
except：除了……之外（表示_____事物间的排除关系）
besides：__________________
but：除……之外（常与no, all, every, each, none, nobody等词连用，有时可与________互换）
选择正确的选项：
—How was your trip yesterday
—It was great ________ the hot weather. Everyone had a good time ________ Fred. He broke his camera.
A．except; except B．except; except for
C．except for; except D．except for; except for
3. not only … but also …：不但……而且……，连接句中句子成分相同的部分，如果用来连接主语时，谓语动词应该以_________后面的主语为准。
中考链接：
1. I like ________ chess ________ drawing. They both improve my thinking skill.
A．neither; nor B．either; or
C．not only; but also D．not; but （河北保定）
2. A break between classes is a good time for students to play sports and talk with their classmates. So it ________ helps with students′ health, ________ improves their social skills.
A. either; or B. neither; nor
C. not only; but also D. both; and （山东临沂）
一、用所给单词的适当形式填空
1．Two ________(billion) people worldwide are expected to watch the game.
2．It takes a few hours _________(fly) to Shanghai.
3．Her ________(foot) are hurt. She can’t walk quickly.
4．The situation here becomes much ________(complex) than before.
5．I think this matter is ________(relate) to Jim.
二、单项选择
1. The movie is good ________ the ending.
A. beside B. besides C. unless D. except for
2. We can’t ________ the mistakes of the past.
A. speak B. repeat C. describe D. introduce
3. What will you do ________ the old books
A. to B. with C. about D. for
4. There are ________ birds living on this island.
A．billion B．billions C．billion of D．billions of
5.________ general, what the teacher says is good for us.
A. On B. To C. In D. For
三、完形填空
Dear Dr. Bamford，
I know you are a famous scientist and have done great work on cloning animals. Please excuse me for writing to you, but I need your __1__. Let me explain. I am a 60 year old man. I'm very rich. I live in a large house. My wife died three years ago. We didn't have children. So, am I __2__？ No, because Ciley is with me. Every night we eat dinner together and watch TV.
Ciley sits beside me __3__ I feel very happy. I'm fascinated(着迷的) by her beautiful green eyes. She's also very smart. Sometimes she thinks only about herself. But that's what I __4__ about her. She is quite a beautiful Siamese cat. There is no other cats like her in the whole world.
These days I worry about __5__ Ciley. She is getting older and older. Cats don't live __6__ humans, of course, so she will die before I do. I can not imagine my life __7__ Ciley.
Well, why not get another cat after Ciley dies __8__！ No other cats can ever replace(代替) her. I have been thinking about this: clone Ciley. Scientists are able to clone sheep, mice and other animals. They should be able to clone cats without much __9__. Luckily, I am a rich man. I don't care how much money I will spend cloning Ciley. I think __10__ to clone pets. It's not human cloning.
What do you think of it Could you clone Ciley
A rich man
1.A. cats B. animals C. help D. money
2.A. lucky B. lonely C. healthy D. happy
3.A. but B. or C. for D. and
4.A. like B. hate C. mind D. stand
5.A. feeding B. catching C. losing D. training
6.A. as hard as B. as soon as C. so often as D. so long as
7.A. with B. without C. of D. about
8.A. Certainly B. Impossible C. Really D. Wonderful
9.A. difficulty B. advice C. hope D. chance
10.A. it's terrible B. you aren't supposed
C. it's OK D. you aren't allowed
四、阅读理解
Do you have brown hair Are you taller than other kids your age These characteristics were decided before you were born. You got your traits from your parents. They passed their traits on to you through genes(基因).
Genes carry codes(代码) for blue eyes or brown eyes. Genes say how tall you will get and whatcolour hair you will have. You got half of your genes from your mother. You got half of your genes from your father. So you have your own set of genes. Each person gets different genes for each body part. That is why you look like—but not exactly like—your brother or sister.
A dominant(显性的) gene shows up most of the time. Brown eyes are dominant over blue eyes. A recessive(隐性的) gene shows up less often. Light hair comes from a recessive gene. Dark hair is more common. Look at the eye colour and hair colour of the people around you. You will see that this is true.
Genes help make you who you are. But they don′t tell the whole story. Your genes may help you be fast and strong. But you still need to learn how to run, swim or skate well.
1.The underlined word “traits” in Paragraph 1 means .
A. characteristics B. experiences
C. achievements D. possibilities
2.According to Paragraph 3, you can see most of the people around you have .
A. brown eyes with dark hair B. brown eyes with light hair
C. blue eyes with dark hair D. blue eyes with light hair
3.What is the passage mainly about
A. Genes carry codes for eyes and hair. B. Genes help make you who you are.
C. Genes help you be fast and strong. D. Genes make brothers look similar.
预习案答案
脱氧核糖核酸 蓝图 一般的;普遍的 复杂的
双胞胎之一 重复;复述;背诵 模式;形式 确认;鉴别
有关的;相关的 孙子;外孙 孙女;外孙女 指示;说明
探究案答案
探究点一：
1.blueprint, Except, parents, body
2.TTTFF
3.
1)
2)
3)ACB
探究点二：
1.far more complex：复杂得多
比较级前可以用much, even, still, far, a bit, a little, a lot等词加以修饰。
中考链接：B
2. except for：除了……以外（表示不同类事物间的排除关系）
except：除了……之外（表示同类事物间的排除关系）
besides：除了……之外还有
but：除……之外（常与no, all, every, each, none, nobody等词连用，有时可与except互换）
选择正确的选项：C
3. not only … but also …：不但……而且……，连接句中句子成分相同的部分，如果用来连接主语时，谓语动词应该以but also后面的主语为准。
中考链接：CC
训练案答案
一、1. billion 2. to fly 3. feet 4. more complex 5. related
二、DBBDC
三、CBDAC DBBAC
四、AAB
一、预习案
列出我的疑惑
二、探究案
我的知识网络图
教与学的反思
三、训练案
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Unit 5 Look into Science
Lesson 29 DNA－
The Story of You
冀教版 九年级
Objectives
1. To understand the meaning and usage of the new words and expressions.
2. To know more about DNA.
3. To learn more about human beings and enjoy science.
Lead in
Does Cindy look like her father
Do you know what makes it
Look the pictures and talk about the questions:
Lead in
What do you know about DNA
What can scientists do with DNA
Presentation
When we build a house, we need a blueprint. And DNA is the blueprint of life.
Look and say
blueprint [ blu pr nt]
Presentation
Twins probably have the same DNA.
twin [tw n]
Presentation
The old lady's grandson and granddaughter have her DNA.
grandson [ ɡr ns n]
granddaughter [ ɡr nd t (r)]
DNA
blueprint n.
general adj.
complex adj.
twin n.
repeat v.
脱氧核糖核酸
蓝图
一般的;普遍的
复杂的
双胞胎之一
重复;复述;背诵
New words
Presentation
pattern n.
identify v.
related adj.
grandson n.
granddaughter n.
instruction n.
模式;形式
确认;鉴别
有关的;相关的
孙子;外孙
孙女;外孙女
指示;说明
New words
Presentation
Practice
Can you remember
complex
twin
identify
general
related
repeat
pattern
grandson
1
2
3
4
5
6
7
8
Number the words:
DNA
11
blueprint
9
granddaughter
10
instruction
12
Generally speaking, a __________ is a drawing.
________ for identical twins, each living thing has its own unique DNA.
Our DNA come from our ________.
A person's DNA is in every part of his or her _______.
blueprint
Reading task
Except
Listen to the text and fill in the blanks:
parents
body
Reading task
Read the text and judge the sentences:
1. DNA is the pattern our body uses to build itself. ( )
2. Each living thing has it's own unique DNA. ( )
3. From your DNA, scientists can identify you and people related to you. ( )
4. Our bones do not have the same DNA as our skin. ( )
5. Building a house is far more complex than building a living thing. ( )
T
T
T
F
F
1. I my twin brother
2. I my grandparent
3. my hair my blood
4.I my brother's skin
5. my mother my sister
6. my father my mother
Reading task
Do they have the same DNA Please judge according to the text.
Reading task
Retell the text in groups according to the following information.
DNA is …
Except for some twins, every living thing has …
Some health problems can be caused …
In the future, scientist might be able to …
There are copies of your …
From you DNA, scientists can identify …
Let's do
Read the lesson and answer the questions.
1．What is a blueprint
2．Which is more complex, building a living thing or building a house
3．Do some twins have the same DNA
A blueprint is a drawing that shows how to put a house together with many different parts.
Building a living thing.
Yes, they do.
Let's do
4．Is it possible to change your DNA
5．Whose DNA is related to yours
Yes. In the future, scientists might be able to change our DNA.
People who are related to me. For example, my parents and grandparents.
1．Your homework is quite good __________a few spelling mistakes.
2．________the young ________the old like pop music.
3．Kate's hair is________ colour ______her sister's.
4．___________, women live longer than men.
5．________ many difficulties remain,we can overcome them.
6．Is wealth _________ happiness
Let's do
Fill in the blanks with the phrases in the box.
except for
in general except for not only…but also
related to even if the same…as
Not only
but also
the same
as
In general
Even if
related to
Let's do
Complete the passage with the sentences in the box.
A．Their DNA can't combine.
B．We can make plants that are bad for pests.
C．They can even combine the DNA of a plant and an animal..
Changing DNA
Do you know DNA can be changed Have you ever seen a pig with a dog's body Of course not! Pigs and dogs can't have babies together. ______But now, scientists can do it. Scientists can take DNA, from one kind of animal and put it into another kind of animal. They can design new plants By combining the DNA of other plants.________ Some scientists are worried. They say we need to know more about DNA before we start changing it.________ But what if the plants are bad for humans, too
C
B
A
Let's do
Is it a good idea to change the DNA of the food we eat Some people say doing this makes our food better. Others think it's too dangerous. Search the Internet for information, discuss and write down your ideas.
Divide the students into two groups.
One group support it is a good idea to change the DNA of the food we eat.
The other group say something about the disadvantages of changing the DNA of the food.
Let's do
You can write like this:
On one hand, it is good to change the DNA of the food we eat. First, ________________________________. Second, _________________
_______________. Third, ______________________________.
On the other hand, it also has some disadvantages. _____________
______________________.
In my opinion, _________________________.
But building a living thing is far more complex than building a house.
但是建造一个有生命的东西比建造一座房子要复杂得多。
far more complex：复杂得多
________前可以用much, even, still, far, a bit, a little, a lot等词加以修饰。
eg. This unit is much easier than that one.
这个单元比那个单元容易得多。
中考链接：
We all like Lucy as she is always thinking ________ of others than herself.
A. less B. much more C. much D. Better
（山东泰安）
Language points
比较级
2. Except for some twins, every living thing has its own unique DNA.
除了一些双胞胎外，所有有生命的东西都有自己独特的DNA。
except for：除了……以外（表示不同类事物间的排除关系）
except：除了……之外（表示_____事物间的排除关系）
besides：__________________
but：除……之外（常与no, all, every, each, none, nobody等词连用，有时可与________互换）
Language points
同类
除了……之外还有
except
eg. Mr Smith is a good man, except for his bad temper.
史密斯先生除了脾气不好外，是个好人。
He can do well in all the subject except art.
除了美术之外，他可以学好所有学科。
He is good a singing besides dancing.
他除了跳舞之外，还擅长唱歌。
Nobody can speak French but me in my class.
在我们班，除了我之外，没有人会说法语。
选择正确的选项：
—How was your trip yesterday
—It was great ________ the hot weather. Everyone had a good time ________ Fred. He broke his camera.
A．except; except B．except; except for
C．except for; except D．except for; except for
Language points
3. From your DNA, scientists can identify not only you but also people who are related to you.
根据你的DNA，科学家不仅能辨别出你，而且能辨别出与你有关系的人。
not only … but also …：不但……而且……，连接句中句子成分相同的部分，如果用来连接主语时，谓语动词应该以_________后面的主语为准。
eg. Not only I but also she has finished the work.
不仅我完成了工作，她也完成了工作。
Language points
but also
中考链接：
1. I like ________ chess ________ drawing. They both improve my thinking skill.
A．neither; nor B．either; or
C．not only; but also D．not; but （河北保定）
2. A break between classes is a good time for students to play sports and talk with their classmates. So it ________ helps with students′ health, ________ improves their social skills.
A. either; or B. neither; nor
C. not only; but also D. both; and （山东临沂）
Language points
1．We should read the i__________ before we take the medicine.
2．Mary and Rose are sisters and they were born on the same day, so they are t________．
3．His mother asked him to r________ what she said.
4．In __________（通常的）, English people are used to talking about the weather when they meet.
5．Every month, the old man's __________（孙子）visit him.
nstructions
wins
epeat
general
grandsons
Exercise
Fill in the blanks according to the Chinese words or the first letter.
1．Is the accident ________ you
A．related to B．relate to C．relating D．related
2．I think this book is far __________ than those ones.
A．the more interesting B．more interesting
C．most interesting D．the most interesting
3．—— Will you fix up the machine according to the _____, David
—— No problem.
A. instructions B. inventions C. invitations D. interviews
Exercise
Choose the correct answers.
4．——Which film do you like best
——The Martian. It ________ shows a lot of imagination ________ has a sense of humour.
A．too; to B．neither; nor
C．either; or D．not only; but also
5．Ben's composition is almost perfect ________ several spelling mistakes.
A. except B. except for C. besides D. beside
Exercise
Summary
Words:
DNA, blueprint, twin, general, repeat, complex, pattern, identify, related, grandson, granddaughter, instruction
Phrases:
in general, except for, not only…but also…, be related of, billions of
Sentences:
· But building a living thing is far more complex than building a house.
· Except for some twins,every living thing has its own unique DNA.
· From your DNA，scientists can identify not only you，but also people who are related to you.
Summary
Science is the most important people in your life，the most beautiful and the most need.
（科学是人们生活中最重要、最美好和最需要的东西。）
Refection
Homework
Write a passage about DNA, try to tell what it is, where it is from, what things you show your parents' DNA.
Preview the words and phrases of Lesson 30.
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