冀教版英语九年级全一册 Unit 5 Look into Science_4 教案

这是一份冀教版英语九年级全一册 Unit 5 Look into Science_4 教案，共8页。

Unit 5 Look into ScienceLesson 4【教学目标】1．记忆单词biology, butterfly, migrate, fantastic, completely, grandchild, female, milkweed, chemical, puzzling;短语grow up, draw one's attention, as many as…, leave for, cut down.2．掌握重点句型:（1）Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.（2）The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.3．通过本课的学习,了解蝴蝶的生活习性.4．能够用英语表达大自然的一些奥秘.【教学内容】1．学会并能正确使用单词及短语: Biology, butterfly, migrate, fantastic, completely, grandchild, female, milkweed, chemical, puzzling; grow up, draw one's attention, as many as…, leave for, cut down.2．能够运用下列句型:（1）Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.（2）The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.3．能够用英语表达大自然的一些奥秘.【教学重难点】1．能够正确应用本课的重点词汇biology, butterfly, migrate, fantastic, completely, grandchild, female, milkweed, chemical, puzzling;掌握短语grow up, draw one's attention, as many as…, leave for, cut down.2．激发学生兴趣,向他人介绍自己所参加的保护生物的活动.【教学思路】思路一:主要以"生物学习"为题,通过设计几个学生感兴趣的问题导入新课,调动他们的学习积极性.思路二:主要以"生物学习"为题,直接导入与本课有关的话题,帮助学生尽快融入情景之中,通过小组合作探究,找出本课的重点短语及重点句型,共同解决疑难.【教学准备】教师在课前设计教学PPT,准备录音机和磁带,多媒体等.【教学过程】Ⅰ．Lead inLeading in 情景1T: Hello, everyone. What do we call the science that studies living things?S1: Biology!T: That's right. What are living things?S2: Animals.S3: Insects.S4: Humans.S5: Plants.T: Yes. Do you know what we call a person who does biology?S6: A biologist.T: Yes. Fantastic.设计意图:设计几个学生感兴趣的话题,师生互动导入本课,渲染课堂气氛,激发学生的学习兴趣.Leading in 情景2T: Good morning/afternoon, everyone. The title of today's lesson is "The Study of Living Things". What job do you want to do after you graduate from high school? Would you like to be a biologist? Dr. Chip Taylor who is a biologist will give us a lecture.Allow several students to respond.设计意图:直接导入与本课有关的话题,帮助学生尽快融入情景之中,为下面的学习做好铺垫.Ⅱ．PresentationThe teacher shows the new words on PPT. Ask students to try to read these words. The students follow the teacher three times. Then give the students five minutes to remember the words. Let students spell and read them one by one.设计意图:教师以PPT的形式呈现本课中出现的生词,领着学生们朗读并记忆,为下面的课文学习做好充分准备.Ⅲ．Reading1．Read the text aloud.T: Boys and girls, it's our reading time. Please read after the video and you should pay more attention to your pronunciation.设计意图:让学生大声朗读课文,对课文的意思有个大致的了解,对于培养学生的正确发音以及培养学生的语感都有重要作用.2．Careful reading.Give the students several minutes to read the text by themselves.Show Let's Do It!Read the lesson and complete the table.Keys: return/fly, spend, lay, rest, kill, find设计意图:通过细读课文,加深了学生们对课文的理解,同时也锻炼了学生们的口语表达能力.问题更加细化,可以更深层次地挖掘文章内容的细节.3．Read the text and find out main phrases and sentences.Main phrases:Draw one's attentionAs many as…Leave forCut downMain sentences:Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.When they begin to travel north in spring, the females lay eggs.Scientists still don't understand how the butterflies know when to fly south.This is both puzzling and interesting for many scientists.There are many mysteries yet to be discovered by those interested in science.Ⅳ．教材解读1．Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.have been doing sth.是现在完成进行时,意为"一直在做某事",表示从过去某时开始的某个动作或状态一直延续到现在,而且还在进行.常常表示动作的延续性、重复性以及感情色彩等.draw one's attention意为"吸引某人的注意力".2．Here, as many as 230 million butterflies spend the winter.As …as…意为"与……一样……", 两个as之间可加形容词或副词的原级;也可加"many+复数名词","much+不可数名词"或"形容词+a/an+单数名词",还可以在as…as…前加twice, half等词表示前后者倍数或分数关系.as…as的否定形式为not as/so…as….spend为及物动词,意为"度过,花(钱/时间)",常用于固定结构:spend time/money(in)doing sth.花费时间/金钱做某事;spend time/money on sth.在某物上花费时间/金钱;spend time with sb.和某人一起度过时光,句子的主语应为人,spend的过去式和过去分词都是spent.3．The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.that return to the south和that left for the north都是定语从句.leave for意为"动身去……".leave意为"离开",是位移动词,可使用现在进行时表将来;leave与表示一段时间的状语连用时,应改为be away(from).4．When they begin to travel north in spring, the females lay eggs.本句中的travel为动词,原意是"旅游,旅行",此处意为"迁徙".本句中的north为副词,意为"向北方",也可说:travel to the north,此时north为名词.lay eggs意为"产卵".注意: lay的过去式和过去分词为laid,现在分词为laying.5．But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.本句中的cut down意为"砍伐".rest在本句中意为"暂停;停止".6．Scientists still don't understand how the butterflies know when to fly south.when to fly south意为"什么时间飞往南方",是"特殊疑问词+动词不定式"结构."疑问词+动词不定式"结构实质上是一个名词性结构,它可以改为一个宾语从句.此时从句与主句的主语是一致的.7．This is both puzzling and interesting for many scientists.both…and…意为"……和……",用于连接两个并列成分.both…and…连接两个并列成分作主语时,谓语动词使用复数形式.both…and…的同义词组为not only…but(also)…,意为"不仅……而且……",反义词组为neither…nor…,意为"既不……也不……".8．There are many mysteries yet to be discovered by those interested in science.interested in science表示"对科学感兴趣的",作定语,修饰those.be interested in表示"对……感兴趣".设计意图:学生是学习的主体,教师要努力调动学生学习的积极性和主动性,通过组内合作讨论,探究,找出课文中的关键单词,短语和句子,把所学的知识转化为学习能力.Ⅴ．Task1．Show Let's Do It! Work in groups of three to play a game.Task tips: 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 beginning with "who", folds the paper and passes it to Student C. Student C must finish the sentence and read it out loud.Example:Mr. BrownWho is a biologist?Will give us a talk2．Instruct the students to work in groups to play this game. Follow the instructions in the student's book.3．Have the students share the results from their game with the class.设计意图:锻炼学生的口语表达能力.Ⅵ．Practice1．Show Let's Do It! No. 2.Join the sentences to make attributive clauses.Example:We did some experiments yesterday. The experiments were fantastic.The experiments that we did yesterday were fantastic.（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._____________________________________________________________________________Ⅶ．教材解读1．The experiments that we did yesterday were fantastic.that引导定语从句,关系代词that代替先行词experiments在定语从句中作did的宾语,可省略.此时,也可使用关系代词which.拓展: 在下列情况下,关系代词只能使用that而不能使用which;不定代词作先行词时;先行词前有序数词或形容词的最高级时;先行词中既有人也有物时;先行词前有the only, just, next等词修饰时;当主句是who/which开头的特殊疑问句时.2．用方框中所给词或短语的适当形式填空cut down, fantastic, draw…attention, butterfly, complete（1）Look! There are many ____ among the flowers.（2）If you ____ the tree, you would do harm to the environment here.（3）The flowers are ____.（4）I ____ forgot about it.（5）The stranger ____ policemen's ____.3．单项填空（1）Studying in groups is necessary ____ you want to do well in school.A．if B．until C．unless D．though（2）Li Ming's shoes are as ____ as Zhang Lei's.A．cheap B．cheaperC．the cheaper D．the cheapest（3）Have you read the book ____ is about Li Kaifu?A．what B．it C．/ D．which（4）My English ____ a lot. I can talk with my English teacher in English.A．improve B．is improvedC．has improved D．improving（5）This butterfly ____ eggs on the milkweed.A．lies B．lays C．lain D．lying（6）I think the three experiments ____ we did yesterday were fantastic.A．what B．that C．who D．whoseKeys:1．（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.2．（1）butterflies （2）cut down （3）fantastic （4）completely （5）drew, attention.3．（1）A （2）A （3）D （4）C （5）B （6）B设计意图:在掌握了课文中的重点句子和短语之后,做词汇练习和语法练习,能有效巩固本课所学知识.Ⅷ．SummaryIn this class, we've learned the study of living things.设计意图:给学生总结,让学生明确这节课的学习内容.Homework1．Finish off the exercises in the activity book.2．Preview Lesson 4.设计意图:让学生通过习题巩固本节课知识点,并提前做好预习.【板书设计】Lesson 28 The Study of Living ThingsMain phrases:Draw one's attentionAs many as…Leave forCut downKey structures:Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.Fantastic facts about butterfliesThe 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 female's ____ eggs on only one plant: milkweed.Things that Dr. Taylor worries aboutIn Mexico, people cut down the trees that the butterflies need to ____ on.In the U.S. and Canada, farmers use chemicals that ____ milkweed.Things that scientists can't understandHow do the butterflies know when to fly south?How do the great-great grandchildren of the butterflies ____ the same forest?