2021学年Unit 2 Saving the earth.Topic 3 What can we do to protect the environment?教学设计

Stage

(time period)

Interaction

patterns

Teacher activity

Student activity

Remarks

1

Revision

（10 mins)

Group work

Let the Ss make a survey and report to the class to finish 4 in Section B.

T: Hi, boys and girls! Let’s begin our class. Please turn to page 46. Let’s do the survey in 4. Have you made the list after class?

T: Fine. Now work in groups as usual. Make a survey in your group. You can follow the example in 4. The group leader should collect the information and report it to the class. When you finish, put up your hand.

T: Stop, please! Now, it’s time to report. Which group wants to report first?

T: I am very glad that you have a good habit of dealing with the waste.

Make a survey and report to finish 4 in Section B.

Ss: Yes.

S1: In our group, xxx always shuts off the electricity when he leaves the room or when the room is bright enough. xxx always turns off the tap when he doesn’t use it. xxx always puts the plastic bottles in a big box and xxx always uses both sides of the paper .

S2: In our group, …

S3: In our group,…

2

Pre-reading

（5 mins)

Class activity

Present the pictures in 1a, 1b and 2a to learn the new words.

T: Now, I will show you some pictures. Try to tell me what the picture is in English. Now, look at this picture, what’s it?

T: Yes. It’s an electric motor. I often come to school on my electric motor. What about this one?

T: You are right. It’s a train. People call it maglev train. It’s different from the traditional steel railways. It has no wheels but it runs very fast. It can run more than four hundred km per hour.

T: …(Use the same way to deal with other words.)

Learn the new words.

S1: Motor.

S2: It looks like a train.

这一课词汇较多，而且有很多专用术语，老师要运用各种方法先讲解部分新词。如：运用图片、构词法或课前集中预习等。

electric(adj)+ ity(名词后缀)=

electricity(n), re(again)+new+able（能…的）=renewable(adj) ,

dis(no)+advantage=disadvantage (n)。本课词汇较多，对于课程标准没有要求掌握的词汇，只要学生能理解即可。

3

While-reading

 (8mins)

Individual work

Individual work

Step 1: Let the Ss read 1a, and match the pictures in 1a and 1b.

T: Next, you will read 1a, and match the pictures in 1a and 1b while reading. When you finish, put up your hand.

T: Who would like to tell us the answers to 1a?

T: Do you agree with her?

T: How about 1b? Volunteers!

T: Is he right?

Step 2: Let the Ss read 1a again and complete the table in 1c. Check the answers.

T: You have learned something about biogas, electric vehicles and maglev trains. Each has its key advantages and disadvantages. Now, read 1a again, find their advantages and disadvantages and put them in the table in 1c. When you finish, raise your hand, please.

T: Shall we check the answers now?

T: xxx, what’s the advantage and disadvantage of biogas?

T: Oh, you all did it very well.

Read 1a and match the pictures in 1a and 1b.

S1: C-A-B.

Ss: Yes.

S2: B-C-A.

Ss: Yes.

Read 1a again and complete the table in 1c. Check the answers.

Ss: No problem.

S1: Advantage: renewable

Disadvantage: long process and high cost for its building
S2: …

S3: …

4

Post-reading

(10 mins)

Individual work

Group work

Class activity

Step 1: Let the Ss guess the meanings of “best-known, German, efficient, guide, path” and then learn them with the help of the vocabulary list.

T: Now, let’s solve the words. First, you’d better guess the meanings of these words, and then learn them by yourself with the help of the vocabulary list.

Step 2: Let the Ss read 1a, and discuss in groups to find the compound sentences and other difficult points.

T: You have read 1a twice, but have you noticed that there are many compound sentences in the passage?  Besides, I know there are some difficult points for you. So I’d like you to read the passage again, and discuss in groups to find out the compound sentences and difficult points. If you finish, please let me know.

T: Group1, could you tell us the compound sentences you have found?

T: Wow, there are so many compound sentences in this passage. Then let’s deal with the difficult points.

Step3: Deal with the difficult points.

Guess the meanings of “best-known, German, efficient, guide, path” and then learn them with the help of the vocabulary list.

Read 1a, and discuss in groups to find the compound sentences and other difficult points.  

S1: In many countries, people…coal,

but it is..and causes acid rain.

However, nuclear power can be very dangerous.

It can not only protect…but also save energy.

It’s too small to hold many people,

but ..future.

S2: There is no wheel noise, because there are no wheesl.

Maglev trains are very energy-efficient and do not pollute the air.

However, maglev guide paths are..steel railways.

Understand the difficult points.

对best-known, German也可以辅以构词法来讲解：

Germany(n,国家名)——German (n, …人)，best+ known(famous) =best-known (adj.)

对本课出现的被动语态和表语从句，老师不要细讲，只要学生能理解句子意思即可。建议老师直接用汉语解释。

5

Finishing

Task 2a

(8 mins)

Class activity

Individual work

Group work

Step 1: Let the Ss look at the pictures in 2a to learn the new words.

T: We know coal, oil and gas are unrenewable sources, and they will run out in the future. So people are finding new ways to produce power. Now, look at the pictures in 2a, do you know what kind of natural sources is used? Let’s start with Picture 1.

T: Yes, in picture 1, people use sunlight. Picture2?

T: In some places, there is hot water coming from deep in the earth. If the water is too hot, it becomes steam. In the past, people used steam to drive trains and ships. Now, can you guess what “steam” means?

T: Yeah! Then Picture 3?

T: Yes. And the last one?

T: Clever! Sea waves are natural sources, too.

Step2: Let the Ss read 2a and match the pictures with the sentences.

T: You have learned about these renewable sources. Now, read 2a quickly and match the pictures with the sentences. If you finish, put up your hand.

T: xxx, could you tell us your answers?

T: Is that right?

Step3: Let the Ss discuss in detail about the use of one kind of energy sources.

T: From the passage, we know that these sources are used worldwide. Now, I’d like you to discuss in detail how to use one of these sources in groups. You’d better take notes while discussing. Because you will write a short passage based on the discussion. 

Learn the new words.

Ss: 太阳能。

Ss: 不知道。

S1: 蒸汽。

Ss: 风力发电。

Ss: 海浪。

S1: Sure. 2-4-1-3

Ss: Yes.

Discuss in detail about the use of one kind of energy source.

地热能是学生所不熟悉的，老师要适当地解释一下。

6

Summarizing and assigning homework

(4 mins)

Class activity

Step1: Let the Ss retell the main content of 1a according to the table in 1c.

T: How time flies! It’s time to retell the main content of 1a now. Ready? Go!

Step 2 : HMK

T: You have discussed and taken note in 2a. After class, you should write a short passage with the notes. You may follow the example in 2b.

Retell the main content of 1a according to the table in 1c.

T&Ss: Biogas is renewable. Farmers recycle straw, grass and animal waste to make biogas. But it requires long time to produce biogas and it costs much to build them. Electric vehicles can not only protect the environment but also save energy. But it’s too small to hold many people. Maglev trains run very fast and quietly. They are energy

-efficient and they have no pollution. However, the paths are much more expensive than the traditional steel railways.

让学生单独复述课文有一定的难度，最好是老师带着一起复述。

What can we do at home to protect the environment?

Section C

Words and phrases：

electric motor（电动摩托）

maglev train（磁悬浮列车）

technology

require

Grammar：

compound sentences（并列句）

conjunctions（连接词）

but, however, and , not only…but also…,…

Sentences:

However, nuclear power can be very dangerous.

It can not only protect the environment but also save energy.

It’s too small to hold many people.

…, but it is very dirty and causes acid rain.

German

wheel

guide

deep

run out

dis+advantage=disadvantage (n)

re(使)+new+able（能…的）=renewable(adj)

not only…but also…