Lesson 26 Keep the Candle Burning优秀说课稿

Lesson 26Keep the Candle Burning Teaching aims Key words 1.

掌握单词及短语: match

use up

be made up of

one fifth

2.

认知词语：holder

shallow

lighter

examine

oxygen Enable to describe the experiment in English 3.Teaching important points

Grasp mastery words and patters 4.Teaching difficult points Describe the experiment in English 5.Teaching aids Candle

a candle holder

a big glass jar

a shallow dish

some water

a lighter Teaching methods: Discussion method, presentation method

Task－based teaching method Type of lesson :

new lesson Teaching steps Step 1 Leading- in Let students look at some pictures about experiments and tell them

today’s topic.

Lesson 26

Keep the Candle Burning 设计意图：图片导入新课的话题，师生互动，激发学生的学习兴趣。创设轻松的学习氛围，开发学生们的学***潜能，从而使课堂最大有效化。

Step 2：pre-reading Look at the pictures and learn the new words Present the new words

match

candle

holder

shallow

lighter

examine

oxygen

use up

be made up of

one fifth

设计意图：利用教具和图片很直观的教给学生们新的词汇和短语，实物是的课堂更亲近化，有利于让学生深刻的记忆新知。

Step 3：presentation 1.Watch，Say and answer (1)What do we need? a candle，a candle holder，a big glass jar，a shallow dish，some water and a lighter. (2)What do we do? First，________ the candle ________ the candle holder. Then ________ the candle holder ________ the dish. Third ________ the dish ________ water. Fourth，________ the candle. Fifth，________ the candle ________ for two minutes. 2.Think about :What will happen? 3. Answer 1)Why did the candle stop burning

2)Why did the water rise? 3) How far dose the water rise? Why? 来源:K]

设计意图：教师示范实验，同时描述实验过程，让学生熟悉实验流程,为下一步做实验做好基础，并讨论会发生什么. Step 3：Drill time

1)Listening carefully and put sentences in the correct order，

(

) Put the candle holder on the dish.

(

) Examine the water in the jar.

(

) Fill the dish half full with water. (

) Let the candle burn for two or three minutes.

(

) Put the candle in the candle holder.

(

) Light the candle. (

) Carefully put the jar over the candle until the top of the jar rests on the dish 设计意图

让学生更加了解这个试验的过程，从而为自己可以很好的试验打好基础，也锻炼了学生的听的能力。

2) :Read the lesson and fill in the blanks Let’s do the experiment together! Put the candle in the candle holder. Put the candle holder on the dish. Fill the dish half full with water light the candle with a _____ or a lighter What can you see ?

The candle is burning_____

the candle burn for two or three minutes Then carefully put the jar over it until the top of the jar rests on the dish As the candle burns it_______the oxygen in the air When the candle stops____

it has used up all the oxygen in the air. The water inside the jar_________and fills about____of the jar. This is because about one fifths of the air is made up of oxygen 设计意图

再一次让学生了解这个试验的过程，从而为自己可以很好的试验打好基础，也锻炼了学生的阅读辨析的能力。

Step 4:Group work: Do the experiment 1).Do the experiment in groups Let students understand the experimental process and principle 2).Write the experiment report (1)What do we need? a candle，a candle holder，a big glass jar，

a shallow dish，some water and a lighter. (2)What do we do? 1._______the candle ________ the candle holder. 2 _______the candle holder ________ the dish. 3.______ the dish ________ water. 4.________ 0the candle. 5________ the candle ________ for two or three minutes. 6.Carefully _________ the jar _____the candle until the top of the jar rests on the dish. 7.Examine the________in the jar. (2)What is happening: 1) The candle stops burning. 2) The water in the jar rises.

3)The waterrises about one-fifth of the jar. Conclusion:

About one fifth of the air is made up of oxygen. Step5 Learning Tips:

Explain the language notes of the text to the class 1.

As the candle burns, it uses up oxygen in the air. 2.

use up “用尽(材料)，设法利用(剩余的材料或时间)”

Jim used up his money to buy the computer eat up

“吃光”

drink up

“喝光”

She gave me two apples ,but I have ate them up.

He drank up all the water. 2. There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar. two-fifths

五分之二

three-fourths

四分之三

口

诀：

分子基，分母序。分子﹥1 ，分母加

s Note 二分之一

a/one

half

(不说：one second) 四分之一

a/one fourth （还可说a/one

quarter）

四分之三

three - fourthsthree quarters

Step6

DO Exercise 1)Correct the mistakes: 1.

There are lots of matchs in the small box. 2.

Can you let my uncle laughing? 3.

You’re very ill, so you must stop to smoke. 4.

Fill the dish half fill of water. 5.

There is about one – five oxygen in the air. 6.

There are about two – third students in the classroom. 7.

I used out my money. Can you lend me some? 2)Circle the correct words to complete the sentences. 1. Don`t (use up / push up) all of the ink(墨水）. Leave some for me. 2.The medical team ( is made of / is made up of ) five experienced doctors. 3. Please fill the hole (with / in)sand and water. 4. My brother wasn`t (strong enough/ enough strong ) to lift the box. 设计意图：通过相关试题的及时训练学生对新知的运用，提高他们的掌握能力。以便更好的巩固所学知识。

Step7:

Homework: 1.Further experiment：（实验拓展）

When two candles burn in the jar,

What will happen?

Do it with your partners after class. 2. Do our exercise book Lesson 26

设计意图：进一步激发学生学习兴趣，鼓励他们热爱科学，积极培养科学的思维方式。让学生课后继续细读课文内容，完成相关题目。

板书设计：

Lesson 26

Keep the Candle Burning Candle

candle holder

light________lighter match

two matches oxygen dish shallow________deep use up

one__fifths be made up of