3. (播放1a的录音，学生跟读，注意语音语调，训练学生读的能力并再次理解课文。)

1. (1)(要求学生在字典中快速地查出1a中生词的意义，培养学生快速查阅字典的能力。)

T: Take out your dictionary. Look up the new words in 1a as quickly as possible.

(2)(抽查个别学生，核对单词的发音与汉语意思。理解power, nuclear和acid rain。)

(3)(以小组比赛、男女生比赛、接力比赛等形式对单词的发音进行操练，让学生达到会读的目的。)

(4)(以同样的方法让学生理解词意，避免枯燥的记忆。)

3. (通过学生对节能环保知识的讨论，老师引出文中所讲的新环保事物，出示1a的挂图，导入新课内容，教授生词。)

T: Look at the pictures. Maybe they are the new things that you haven’t known. They show us some forms of energy. Some of them may do less harm to our environment. What’s it in Picture a?

Ss:It’s a car.

T: Yes. What a beautiful car! The window matches the color of the car. Is it strange?

Ss:Yes.

T: It’s an electric car. It works well, but it’s slow and can’t run for long.

(板书并讲解，要求掌握)

T: What’s it in Picture b? Who knows it?

S₉:It’s a train. It can run fast.

T: You’re right. It’s a Maglev Train. It uses magnets. Its advantages are quiet, fast and clean, but it’s too expensive.

(教师领读并解释。)

(学生复述句子。)

(通过同样的方法，让学生了解1a几幅图中新的制造能量的方法。)

Step 2 　Presentation 第二步 　呈现(时间:10分钟)

2. (学生小组讨论节约能源的各种方法，以旧带新，导入新课主题。)

T: We must not only protect our environment but also save energy like electricity. Now discuss this problem in pairs: What should we do to save energy?

(学生分组讨论，鼓励学生说出日常所观察到的情况。)

T: Well, I’m sure you have some new ideas to save energy. Please tell me one by one. Now let’s compare whose ideas are better and greener. Who’s the volunteer? Please hands up!

S₁: Don’t drive a car if you travel a short distance.

S₂: Write on both sides of the paper.

S₃: Don’t use the things that can be used only once.

S₄: After we wash faces, we can use the used water to wash clothes.

S₅: Take a cloth bag when we go shopping.

S₆: Turn off the TV set while you are away.

S₇: …

(鼓励学生借助肢体语言、图画，尽可能地把想法表达出来，激发学生的热情，培养创造性。)

T: Good ideas! Thank you, boys and girls! Which idea is better and greener?

S₈:I think S₇’s is better and greener.

Step 1 　Review 第一步　 复习(时间:12分钟)

1. (1)(通过对上一课1a的复习，强调怎样做才能成为绿色使者, 进一步增加学生的环保意识，同时也创造一种英语氛围。)

T: 　　　 Can you remember what we have learned in Section B?

Ss: Yes.

(教师可以出示上一课 1a图片。)

T: 　　　 What are Jane and Michael doing?

Ss: They are talking about how to be a greener person.

T: 　　　 Can you tell me how to be a greener person?

Ss: First, turn off the lights when we leave a room.

T: 　　　 What about the next?

Ss: Walk or ride a bike instead of taking a bus or a taxi …

T: 　　　 Very good. Please go on.

Ss: Take a cloth bag when we go shopping.

T: 　　　 Great. It’s easier said than done. So just do it from now on.

录音机/图片/小黑板

3. Learn some kinds of energy and their advantages and disadvantages.

2. Learn some compound sentences:

(1) Though the car worked, it smelled terrible!

(2) They work well, but they are slow and can’t run for long.

(3) The water trains in Wales use water to push one train down a hill while pulling another train up the hill.