九年级英语上册Unit5LookintoScienceLesson29DNA—TheStoryofYou教案(新版)冀教版

1、本文档来源于网络搜集整理上传，希望可以让更多的人阅读！Unit 5 Look into ScienceLesson 29 DNA-The Story of You教材分析i J1. Analysis of the StudentsThe students of Grade 9 have mastered certain vocabularies, expressions andstructures. They also have the abilities of self-teaching and working in groups.Most of them are willing to ex

2、press their opinions in English.2. Analysis of Teaching ContentLesson 28 is the fifth lesson in Unit 5, Book 5.This unit focus on the subjectLook into science, also teach the students something about science. Students cares about the subject because it is close to everyone. Lesson 28 mainly talks ab

3、out DNA, it tell us the character and function of DNA, also understand our body. Weare unique in the world.教学目标 J【知识目标】1. To master the words: blueprint, general, complex, twins, pattern, identify, be related to, except for.2. To master the phrases: not only but also, except for, be related to, bill

4、ions of.【能力目标】Improve the students ' ability of speaking, listening, reading and writing. Understand the articles about DNA.【情感目标】Know more about the nature, know more about our body. You are unique in the world.【教学重点】To master the compound sentences.【教学难点】To master the use of DNA.课前准备Tape recor

5、der, Multimedia教学过程Step 1. Warm-upFree talk: (show the picture of DNA, tell students DNAis short for deoxyribonucleic acid.)Think about it!1. What do you know about DNA?2. What can scientists do with DNA?Step 2. Presentation1. Free talk:(1) Where is it in our body? (Show some pictures of DNA.)(2) Wh

6、at's the function of DNA? (Show some pictures of twins.)本文档来源于网络搜集整理上传，希望可以让更多的人阅读!本文档来源于网络搜集整理上传，希望可以让更多的人阅读2. Explain the new words.3. 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

7、 the same DNA?(4) Is it possible to change your DNA?(5) Whose DNA is related to yours?4. Check the answers and underline the key words.5. Listen and follow to the tape.6. Explain the language points:between 与 amongbetween用于两者之间，among一般指三者或三者以上。Jack sits between Tim and Bob.Jack坐在Tim和Bob之间。She was am

8、ong the crowd.她处在人群中。use-to do sth. 用做某事She is using a knife to cut vegetables.她正用小刀切蔬菜。use 的形容词是useful.Is the fridge very useful?这台冰箱很有用吗？too 与 eithertoo 与 either 都表示“也”， 其区别是too 用于肯定句，表示“也”； either 用于否定句，表示“也不”。他们通常都位于句末，其前用逗号隔开。He has a baby brother, too.他也有个小弟弟。He doesn t have an eraser, either.

9、他也没有橡皮。own的用法adj.自己的（用在所有格后面，加强语气）He makes all his own notebooks.她所有的衣服都是自己做的。vt. 有；拥有Who owns the car?这辆汽车是谁的？owner n. 所有人；物主She is the owner of the house.她是这座房子的主人。except for 除以外，只是David is a good man except for hot temper.大卫除了脾气暴躁以外，他是个好人。The classroom is nice except for dirty on the floor.教室除了地板

10、脏以外都很好。Step 3. Practice1. Read the lesson by themselves.2. Fill in the blanks with the phrases in the box on page 75.in general, except for, not onlybut also,related to, even if, the same as (1) Your homework is quite gooda few spelling mistakes.(2) the youngthe old like pop music.(3) Kate s hair is

11、colour her sister s.(4) ,women live longer than men.(5) many difficulties remain, we can overcome them.(6) Is wealthhappiness?3. Check the answers.4. Ask students: Do you think DNA can change each other? Read again and Complete the passage with the sentences in the box.Changing DNADo you know DNA ca

12、n 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 DNAof other plants. Some

13、 scientists are worried. They say we need to know moreabout DNA before we start changing it.But what if the plants are bad for humans, too?本文档来源于网络搜集整理上传，希望可以让更多的人阅读本文档来源于网络搜集整理上传，希望可以让更多的人阅读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.5. Check the answers.Step 4. ConsolidationGroup work:Is it a good idea to change the DNA of the food we eat?Somepeople say doing this makes our f