Unit 5 Look into Science-Lesson 29 DNA — The Story of You-ppt课件-(含教案+素材)-市级公开课-冀教版九年级全一册英语(编号：30350).zip

Oral homework : Make a summary “What do you know about DNA?”Lesson 29 DNA The Story of You犯罪嫌疑人犯罪嫌疑人Fill in the blanks according to the Chinese given1 She had a confused idea of life in_(一般的).2 Could you_(重复) that question for me?3 Please follow his_(模式) to do it.4 Our culture is _(复杂的) than he knows.5 Would you be able to_(辨别) the man who robbed you ?6 please look at the _(说明)before you take the medicine.generalrepeatpatternmore complexidentifyinstruction( ) 1 A blueprint shows where to put all the parts of the house.( ) 2 You can know what size your feet are with DNA.TT( ) 3 Every living thing has the same DNA.( ) 4 Your DNA is different in every part of your body.( ) 5 Your DNA is different from your parents.FFFListen to the tape and write T or FAnswer 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 ?4 Is it possible to change your DNA ?5 Whose DNA is related to yours ? Language points 1 in general 2 except for 3 be related to 4 not only but also 1in general 意思是“一般而言；概括说来（通常置于句首）”。也可以用generally speaking来表示。例如： In general / Generally speaking, women cry more easily than men.2 except for用于表示对整体的肯定和局部的否定。例如： Smith is a good man, except for his bad temper. 史密斯除了脾气不好之外是个好人。The movie was good except for the ending.这部电影除了结尾之外都好。(1)The city is good _the weather.(2)We all went to the zoo_Li Ming.(3)He also knows Japanese_English.except forexceptbesides3 be related to意思是“与有关，使互相关联” 也可以用relate to表示。例如： The matter is related to him. The matter relates to him.4 not onlybut also意思是“不但而且”，连接两个相同的成分，也可以连接两个分句。连接两个并列主语的时候，谓语动词和最近的主语一致。例如：He likes not only English but also math. Not only you but also I am a teacher.Translate these sentences into Chinese1 In general, a blueprint is a drawing that shows how to put a house together with many different parts.2 It takes millions of years for nature to change the DNA in living things to make them fit the world they live in.3 All these things are strongly influenced by your DNA before you are born.4 Your DNA has billions of instructions that explain why you are the way you are. Oral homework : Make a summary “What do you know about DNA?”Lesson 29 DNA-The Story of You教学目标：通过自主探究，合作交流的模式，理解课文大意，掌握语言知识点以及用法。教学重点和难点：1 理解课文大意2 掌握下列短语:in general , except for, be related to, not onlybut also, 3 理解下列句子：(1) In general, blueprint is a drawing that shows how to put a house together with many different parts.(2) It takes millions of years for nature to change the DNA in living things to make them fit the world they live in.(3) All these things are strongly influenced by your DNA before you are born.(4) Your DNA has billions of instructions that explain why you are the way you are.教学过程：Step 1 Greeting Step 2 Lead in Ask students the following questions : “Do you know DNA ? How much do you know about DNA? What can we do by DNA?”1When the lost children are found, we can tell who are their parents.2 DNA can help the police catch the bad man.3 People are often ill. We can prevent some illness by DNA. We can live longer.4 The scientists can study the people long long ago.Do you know why we can do these things? Lets find out the answer in Lesson 29.Step 3 Learn the new words in groups and then ask some students to read the new words. And then give the students one minute to ask the students to remember the all the new students. Then do some exercises.1 She had a confused idea of life in_general_(一般的).2 Could you_repeat_(重复) that question for me?3 Please follow his_pattern_(模式) to do it.4 Our culture is _more complex_(复杂的) than he knows.5 Would you be able to_identify_(辨别) the man who robbed you ?6 please look at the _instruction_(说明)before you take the medicine.Step 4 Listen to the tape and write T or F（初步感知课文）( T ) 1 A blueprint shows where to put all the parts of the house.( T ) 2 You can know what size your feet are with DNA.( F ) 3 Every living thing has the same DNA.( F ) 4 Your DNA is different in every part of your body.( F ) 5 Your DNA is different from your parents.Step 5 Lets Do It ! No.1 Read the lesson and answer the questions.（了解课文大概内容）1 What is a blueprint?A blueprint is a drawing that shows how to put a house together with many different parts.2 Which is more complex, building a living or building a house?Building a living is more complex.3 Do some twins have the same DNA? Yes.4 Is it possible to change your DNA? Yes .5 Whose DNA is related to yours? People who are related to you.Step 6 讲解课文中的重点知识点。in general, except for, be related to, not onlybut also1in general 意思是“一般而言；概括说来（通常置于句首） ”。也可以用 generally speaking 来表示。例如： In general / Generally speaking, women cry more easily than men.2 except for 用于表示对整体的肯定和局部的否定。例如： Smith is a good man, except for his bad temper. 史密斯除了脾气不好之外是个好人。The movie was good except for the ending.这部电影除了结尾之外都好。(1)The city is good _except for_the weather.(2)We all went to the zoo_except_Li Ming.(3)He also knows Japanese_besides_English3 be related to 意思是“与有关，使互相关联” 也可以用 relate to 表示。例如：The matter is related to him. The matter relates to him.4 not onlybut also 意思是“不但而且”，连接两个相同的成分，也可以连接两个分句。连接两个并列主语的时候，谓语动词和最近的主语一致。例如：He likes not only English but also math. Not only you but also I am a teacher.Step 7 Lets Do It ! No.2 (巩固所学知识点)Step 8 小组合作翻译课文中的重点句子。 （再次加深对课文的理解）1 In general, a blueprint is a drawing that shows how to put a house together with many different parts.通常来说，蓝图就是用来展示如何将许多不同部分组建成一幢房子的图纸。2 It takes millions of years for nature to change the DNA in living things to make them fit the world they live in.自然界需要花费百万年来改变生物的 DNA，使其适应所生活的世界。3 All these things are strongly influenced by your DNA before you are born.这些在你出生之前，就深受你的 DNA 的影响。4 Your DNA has billions of instructions that explain why you are the way you are.你的 DNA 有着数十亿的指令，解释着你为什么呈现出当前你的模样。Step 9 Read the lesson in groups and then ask some students to read the lesson .同时检查对课文还有无疑问。Step 10 Why can we do these things by DNA?1 Childrens DNA repeats from their parents DNA.2 Except for some twins,every living thing has its own unique DNA.3 Some health problems can be caused by problems in our DNA. Scientists can look for these problems and sometimes help us before we become sick.Step 10 Homework：Make a summary “What do you know about DNA ?”