Lesson 26 Keep the Candle Burning评课稿

若笠中学课堂教学设计

课题

Lesson 26

Keep the candle burning. 知识目标

教学目标

能力目标

情感目标

教学重点

授课班级

Class 2,Grade 9

教者

马海臣

Words and expressions Do and express the experiment.

Love science

一、重点词汇

match, light, use up, candle holder, shallow, oxygen, one fifth,

二、重点句型

1）Keep the candle burning.

2）Light the candle.

3）About one fifth of the air is made up of oxygen.

Describe the steps of the experiment.

1课时

课型

新授

教学难点

计划课时

教

学

过

程

设

计

教学设计

教

学

过

程

补充与修改

Step 1.Greetings. 设计意图：让学生做好上课的准备。

Step 2. Do an experiment. 设计意图：通过展示图片让学生理解掌握本课新词汇及整个实验过程。

Step 3. Language Points 1. 分数的表达

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 2. Keep the candle burning. 3.Let the candle burn for two or three minutes. 设计意图：通过边做实验边让学生对重点知识理解掌握。

Step 4. Read and fill in the blanks Read the text 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. 设计意图：让学生带着任务再熟悉课文，进一步提高学生的阅读能力。

Step 5. Exercises Let the students do some exercises about the key points. 设计意图：通过练习让学生巩固本课的重点知识。

Step 6. Homework 请根据课文内容, 以

“An Interesting Experiment”为题写一篇小作文。

Do an experiment after class. (课外实验拓展) 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. 设计意图：通过让学生做一个有趣的实验，一方面激发学生学习英语的兴趣，另一方面让学生学习用英语来描述一个实验。

Lesson 24 Keep the candle burning

板书设计

1、keep sb./sth doing

candle

holder 2、use up

shallow

matches 3、stop doing

oxygen stop to do

4、one

fifth, one half

be made up of

教学反思