冀教版九年级上册Lesson 28 The Study of Living Things教学课件ppt

设计说明

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.

  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.

 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  Language points

1. Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.

 关于这种蝴蝶的奇异的事实一直吸引着泰勒博士的注意。

◆have been doing sth.是现在完成进行时的结构,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。

  Mr. Smith has been living in London since 1995.

  史密斯先生自从1995年以来一直住在伦敦。

◆draw one’s attention意为“吸引某人的注意力”。

  He tries to draw our attention to the painting.

  他试图把我们的注意力吸引到这幅画上。

【拓展】

  catch one’s attention 引起某人注意

  pay attention to sth. 注意、留心某事

  give one’s attention to sth. 关心某事

2. Here, as many as 230 million butterflies spend the winter.

 多达两亿三千万只蝴蝶在这里过冬。

◆as…as…意为“与……一样……”,两个as之间可加形容词或副词的原级; as…as的否定形式为not as/so…as…。

 This film is as interesting as that one.这部电影和那部电影一样有趣。

 He is not as tall as his brother.他不如他哥哥高。

◆spend(spent，spent)为及物动词,意为“度过,花(钱/时间)”,其所在句的主语应为人，常用于固定结构:  

spend time with sb.和某人一起度过时光

spend time/money 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

I like spending my free time with my friends.

我喜欢和朋友们一起度过我的空余时间。

He spent two hours doing his homework.

= He spent two hours on his homework.他花了两个小时做作业。

3. The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. 回到南方的蝴蝶是向北迁移的蝴蝶的玄孙(女)。

◆leave for意为“动身去……，前往”。 leave ...for...离开……去……

  They left for his hometown yesterday.昨天他们动身回老家了。

  They will leave Beijing for Guangzhou tomorrow.

  他们明天要离开北京去广州。

4. But in Mexico , people cut down the trees that the butterflies need to rest on because they want more land for farming. 但在墨西哥，人们砍伐了蝴蝶需要栖息的树木，因为他们需要更多的土地来耕种。

◆cut down意为“砍伐”，为“动副结构”短语，代词作宾语时要位于cut和down之间。

   Many trees were cut down so that the soil was also washed away.

   很多树被砍伐了， 结果土壤也被(雨水)冲走了。

   There used to be many trees here, but people cut them down later.

   以前这里有很多树，但后来人们把他们砍伐了。

【拓展】

  cut off  切断      cut up 切碎     cut in 插嘴

Step 6  Analyzing

Find two sentences with attributive clauses from the passage, then analyze them.

Step 7  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 8  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

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

教学反思