3. Divide Ss into four groups and ask them to discuss the following question.

Can we call the person who helps others a “volunteer”?

Suggested Answer:

　 When one of your parents or friends needs help, you may not be asked to help but you volunteer to help, we don’t say you are a volunteer. A volunteer is a person who helps others in or outside his community or in a foreign country.

Step 3. Pre-reading

　Purpose: To get Ss prepared for the reading text.

2. Ask Ss to work in groups of four and one of them to interview the other three. Tell him to ask the questions in Ex1 of Warming Up on P28. Then get one pair to act out their dialogues before the class.

1. Ask Ss to discuss the following question.

In what ways do we help the people around?

2. Get some Ss to present their opinions on the question above before the class.

Suggested Answer:

　 Nobody can do everything alone, no matter how powerful he is. Nobody never meets with trouble, no matter how well he is going. So everybody needs others’ help. But we cannot always receive but never give. We must give in return for what we receive. We give help because we have been helped. Since we were born, we have received a lot from the society. So we should return it. We give help today, but we may need help tomorrow. Even if we may not see a person again, by helping him, we can let him know help is necessary and important for those who are in need. By helping each other, people can feel that life is full of warmth and friendliness and is worth living. In a word, to help others is to help oneself.

Step 2. Warming Up

1. Lead Ss to the content of this unit. Teacher may say, “We have all heard about Lei Feng, who was ready to help others and set us an example. We live our own lives. Everybody has his own work to do. Why must we help others?”

3. To teach how to use the new words and phrases in the text.

Teaching Procedures:

Step 1. Leading-in

2. To help Ss to learn about the educational and living conditions of some developing countries and develop their awareness of helping those in need.

第四课时：Reading and discussing (Using Language)

第五课时：Listening and speaking (Using Language)

第六课时：Reading task (Workbook), Speaking task (Workbook) & Writing task (Workbook)

IV．教学步骤：

Period 1　 Warming up, Pre-reading, Reading & Comprehending

Teaching Goals:

1. To help Ss to learn the importance of helping others and the ways to help others.

19.在1.01×10⁵Pa时，16g S在足量的氧气中充分燃烧生成二氧化硫，放出148.5KJ的热量，则S的燃烧热为　　　　　　　　　　　　　　 ，S燃烧的热化学方程式为 　　　　　　　　　　　　　　　　　　　　　　　。

[学习反馈或反思]：

18.在1.01×10⁵Pa时，4g氢气在O₂中完全燃烧生成液态水，放出572KJ的热量，则H₂的燃烧热为　　　　　　　　　　　　　 ；表示氢气燃烧的热化学方程式为　　　　　　　　　　　　　 。