Lesson 26 Keep the Candle Burning公开课教案

Lesson 26

Keep the Candle Burning

┃教学整体设计┃

【教学目标】

1.知识目标：能够熟练记忆、使用match，use up, be made of,one fifth单词和短语。

接触词汇:holder, shallow, lighter，examine, oxygen 2.能力目标：能够用英语描述实验过程解释实验现象和结论。

3.情感目标：在学习中积极思考，勇于动手实验，培养热爱科学的精神。

【教学重难点】

重点：掌握本课单词，用英语准确地描述实验过程，通过听、读，反复呈现，实验操作突出重点。

难点：用本课所学知识描述实验过程、现象和结论

┃教学过程设计┃

教学过程

一、创设情境，切入主题

Step 1：Free talk Yesterday we did an interesting experiment . Do you remember? Look at the picture, what can you see?（学生根据图片复习昨天实验）Today we will do another interesting experiment. lesson26：keep the candle burning. I believe you will love it. 设计意图：通过图片复习lesson25所做实验，导出lesson26课（由已知到新知）

二、展开过程，探究新知

Step1:Look at the picture ,observe what we need to do the experiment? 设计意图：鼓励学生通过观察图片和对实验强烈的求知欲和好奇心并利用带来的教具，学习本课的新词。为下一步用这些实验器材可以做什么实验打下基础。体现本单元主题Talking About Science。

Step 2：Presentation

1.

Listen ，fill and remember First,______the candle____the candle holder. Second, _____ the candle hoder ____the dish. Third,______the dish half full _____ water. Fourth,____ the candle. Fifth,_____the candle ____for two or three minutes. Sixth, carefully_____the jar ____the candle until the top of

the jar ________on the dish. Seventh,______the water in the jar.

设计意图：听录音模仿语音语调，填空并记忆实验步骤，为学生做实验做好准备。

2.Imagine and Predict If I put the jar over the candle until the top of the jar rests on the dish，what will happen? I’m not sure./I’m sure it will...

I think... Maybe... 3.Do，Observe and Answer A student come to the front to do the experiment . The other students describe how to do the experiment . Then observe what will happen? (The candle stops burning.The water rises up.)

设计意图：并鼓励学生示范实验，同时鼓励他们表述实验描述实验过程，让学生熟悉实验流程。

Step 3：Discussion (studying in groups) 1.Why did the candle stop burning? (Because it has used up the oxygen in the air.) 2.Why did the water rise? (Because the force outside the jar is stronger than the force inside the jar.) 3.How far did the water rise?(It rises about one fifth of the jar.）

4.What does this experiment show about air? (It shows that about one fifth of the air is made up of oxygen) 设计意图：通过观察实验鼓励学生主动去合作探究，体现本单元主题Talking About Science。

Step 4：Describe the experiment with your partner. 设计意图:通过与同伴再次对实验过程及现象的描述，进一步为学生创造了语言实践的机会，并锻炼学生对英语进行完整的表达。

三、布置作业

写作：能用英语描述实验你们做的非常好，请尽量用本课所学单词短语句型，用自己的话将实验过程、现象和结果描述一下

┃教学小结┃

【板书设计】

Lesson 26

Keep the Candle Burning

use up用光，耗尽

light+er---lighter

one-fifth五分之一

hold+er---holder

分数的表达

be made up of

[来源学科网ZXXK]2.[来源学科网]