1、Finish off the activity book.

1、First，you need to get ready.

need

1)vt.

I don't think you need to worry about this.

These flowers needs watering.

They need our help.

　2)v.aux.

　 Need I go so early？

　 -Must I finish my homework this morning，mum？

　 -No，you needn’t.

Lesson32 Unit Review

Class opening

²　　　　 Sing the song in Lesson28.

²　　　　 Revise the steps of experiments in this unit.

Step1、Building Your Vocabulary

1)Part A

Work alone，then check the answers.

2)Part B

Fill in the blanks，then read aloud.

3)Part C

Work alone，then check the answers. Read aloud.

Step2、Grammar in Use

Write out the answers.

Step3 Speaking the Language

Work in pairs.

Class opening

3、Preview Lesson 32.

Language points

1、As the candle burns, it uses up oxygen in the jar.

l　　　　 burn 　v. (burned, burned /burnt, burnt)

　Don’t burn yourself when you light the candle.

l　　　　 use up 　

Glue is all used up.

l　　　　 as　 　conj

She listens to the radio as she washes clothes.

We should do as we say.

You did the homework as well as he did.

Good-bye everyone.

Lesson 31 Surprise Your Friend！

Step1、 Revision

Ø　　　　 Sing the song in Lesson28.

Ø　　　　 Ask a group of volunteers to act how to keep the candle burning.

Ø　　　　 Describe it to the class.

Step2、Reading

Read the letter and find out the steps to do the experiment. “First…，Next….” Then ask your class “Why does the cardboard hold the water?”

Step3、Discussion

Discuss the reasons of “ the cardboard can hold the water” with your class.

Do you think science is interesting？Would you like to do another one？Have a try please. Come to “LET’S DO IT！”

Class closing

3、Preview Lesson 31.

Language points

2、Try to do another experiment that you are interested in.

7.Look at the water in the jar. What observation can you make

Step3 Doing and explaining.

Divide students into groups with three or four. Have them explain as they do it. After doing that，what’s your conclusion？Is it interesting？What experiment would you like to do in this unit？Choose one and have a try as the PROJECT says.

Class closing

6.Carefully put the jar over the candle until the top of the jar rests on the dish.

5.Let the candle burn for two or three minutes.

4.Light the candle.