Lesson 26 Keep the Candle Burning板书设计及意图

洮阳初中九年级英语学科二次备课稿

备课人：王妍

审核人：赵喜娟

章节课题

教学目标

课型

New Lesson

Lesson26 Keep the Candle Burning!

知识目标:Words and expressions 能力目标:Do and express the experiment 德育目标:Love science 一、重点词汇

match, light, burn, use up, candle holder, shallow, oxygen, one-fifth, make sb do 二、重点句型

1. Fill the dish half full of water 2.To make a candle burn , you light it Write a composition to describe an interesting experiment. 教学重点

教学难点

课时安排

教学辅助手段

一课时

教学PPT,录音机和磁带,多媒体等。

教学流程与知识点

师生双边活动

个性化修改

Step 1.Greetings. Step 2. Think about it. 1.

Do you think science is interesting? Why or why not? 2.

Name one or two famous Chinese scientists. What do you know about

them? Step3. Read 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 fifth of the air is made up of oxygen.

Step 4. Language Points 1. 分数的表达

Try to answer the two questions.

Enjoy the process of this experiment.

Read the text aloud and fill in the blanks.

1) 分数由分子及分母两部分构成。用英语表达时，分子用基数词，分母用序数词。

2) 若分子为1，则分母的序数词为单数形式，若分子大于1，则分母的序数词用复数形式。

3)

½

＝

one (a) half 或

one second (one-second) 4)

¼

=

one (a)quarter 或

one-quarter Step 5. Do an experiment. Can an egg “swim” in the water?

First, put some salt into the glass. Then, add some water. Next, mix the salt and the water together. Finally, put the egg into the glass. Step 6. Exercises Let the students do some exercises about the key points. Step 7. Homework 1）Finish off the exercises in the activity book. 2）Preview the Lesson 27.

板书设计：

Lesson 26 分数的英语表达

Let the students write the important language down.

Observe the experiment, and try to describe the experiment in English. 1) 分数由分子及分母两部分构成。用英语表达时，分子用基数词，分母用序数词。

2) 若分子为1，则分母的序数词为单数形式，若分子大于1，则分母的序数词用复数形式。

3)

½

＝

one (a) half 或

one second (one-second)

¼

=

one (a)quarter 或

one-quarter

本课时易错点记录：

课后反思：

审阅人：

年

月

日