Lesson 29 DNA — The Story of You公开课教案

课 题

Lesson 29 NNA—The story of You 1.

能够熟练掌握本课general, copy , not only… but also…等单词及短语的用法，熟练运用一定的句型。

教学目标

2.

能够知道DNA以及DNA的作用，更多地了解我们的身体。

3.

通过听读课文，回答问题，能简单用所学英语表达自己的观点。

4.

应到学生发挥想象，引起对科学知识的兴趣。

5.

要求学生树立自主学习的意识。

重点：了解DNA以及DNA的作用。

教学重点

难点：能与同伴用英语谈论人与人之间的相貌特征话题。

集体备课

个性备课

Talk about the questions with students.

Listen to the tape and answer the questions.

Read the text and answer questions. the Then Step 1 Warming up 图片导入：提问Do you and the students near you look the same? What is the same? Are there differences between you and them? 然后出示本班相貌差别较大的两名学生照片，并问：Do you think they look similar? Do you know they are cousins? 激发学生浓厚的兴趣，自然而然的引出课题：Why do some students look different? And why do cousins look similar? Because of DNA.板书 ;Lesson29: DNA –The Story of You. Step 2 Listening Listen to the tape twice with the following questions. 1.

In ___________,a blueprint is a drawing.(general) 2.

__________some twins, every living thing has its own unique DNA. (Except for) 3.

You have your own unique DNA, but it __________patterns from your parents’ DNA .(repeats) Step 3 Reading Read the text and answer these questions. 1.

Where does your DNA come from? (Your parents.)

2.

Is your DNA in every part of your body? (Yes, it is.)

3.

What can scientists do with DNA? (From your DNA , scientists can identify not only you, but also people who are related to you.) Step 4 Explain the language notes of the text to the class 1.

in general:通常，一般而言，总之

check the answers. Explain the language notes to the students.

2.

except for:除……以外，只是

3.

millions/billions of:几百万、数十亿

4.

not only … but also…不但……而且……，连

接两个相同的成分，也可连接两个分句。Not

only… but also…

连接两个并列主语时，谓语动词和后面主要保持一致；not only…but

also…

连接两个并列分句，not only置于句首，

通常用倒装结构，也就是说，把not only引导

的分句中的助动词或be 提到主语前面。

5.

relate to 涉及，有关

Step 5 Practice Do the exercises and Do Exercise 2 “Let’s Do It”.

check the answers Step 6 Homework one by one.

Do Exercise 3 “Let’s Do It”.

作业布置

基础题 练习册 提高题 绩优学案

Lesson29:DNA—The Story of You in general

millions /billions of 板书设计

except for the same...as...

not only ... but also related to

本课是九年级冀教版的第二十九课，以“DNA”为题。本节课主要采取任务型教学及口语交际教学法教导学生学习该课。本课重点培养学生的理解及表达能力，因此选择课后反思

使用任务型阅读教学方法为主，活动教学为辅，借用多媒体教学手段展示，培养学生直接用英语理解、表达和思维的能力，综合提高他们的英语运用能力。