Lesson 29 DNA — The Story of You国家获奖教案

瓜州县第二中学集体备课导学式教案 （

九

）年级（

英语 ）备课组

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Lesson 29

DNA------The Story of you

1. Understand the text’s Chinese meaning and know about DNA

:

2. Recite the key phrases and sentences

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1. Understand the meaning of the text and recite the key points. 难

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2. Can use some important words and phrases;

教法

reading, talking

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practicing

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Step 1: review

1. have a dictation about the words and phrases of lesson 28. 2.talk about the mistakes of the homework together and ask the students to correct the mistakes in class on their homework ‘s books

the teacher writes the topic on the blackboard

Step 2 :show learning-aims: :(见目标栏)

Read the learning aims and understand the English meaning as quickly as possible

Step 3: Lead in: think about the questions and try to answer:

Who do you like , your mother or father? Why ? What do you know about DNA? Can the scientist change the DNA of the living thing in the future?

(let the students talk about the questions for a while in groups ,then the volunteers answer them with the

other students or teacher ‘s help, guide the students to use the text’s words and sentences if necessary ) Then let the students do the exercises 1 of “let’s do it “ on their books with the partners by reading the text, then ask several students to answer them

Step4: learn about the new words and the key points:

1.

Let the students try to read the new words by themselves.

blueprint,

general, complex ,twin , repeat, pattern, identify , related, grandson,granddaughter, instruction, in general,except for, be related to ,billions of

2. The teacher guide the students to spell and read the new words quickly , then ask several students to read them, and check if all of the students can read them by reading together again

3.Talk about the key points

What …..do with …?

How …deal with ….?

瓜州县第二中学集体备课导学式教案 （

九

）年级（

英语 ）备课组

In general

the blueprint of life

except for

be related to

on the earth

on

earth

combine …with …

combine …..and

…. except:

除了，不包括所陈述事物。

except for: 除了，表示整体情况，对细节加以纠正。

besides: 除了....... 之外还有......,表示累加关系。

but : 除..... 之外，不包括所陈述事物在内。

You article is quite good except for several spelling mistakes . He had considered everthing exept the weather. Besides football ,I like playing basketball and table tennis. Nobody but Li Ming talked to Lin Tao today .

(the teacher helps the students to use the key points to make some sentences) Step 5: practicing：

1. let the students finish the exercises 2 of “let’s do it “ on their books quickly , then the teacher check the answers if yes or no , and explain the reasons about their own reasons

2. 用括号内所给单词的适当形式填空。

(1) It took the scientist half an hour____ (identify) what it was. (2) It seems that these two events are ____ (relate) to each other. (3) All_____ (live) things depend on the sun for their growth. (4) This kind of skirt is much________ (expensive) than that one. (5)It was ______(amaze) that the policemen caught the criminal (罪犯) just an hour later. (6) Do you know who is the ___________( own ) of the bike ? (7) Your body uses this pattern _____________(use ) itself . (8) You have your own DAN, but it repeats the pattern from your ___________( parent )

DNA. (9) Some health problem come from your family\s DNA. __________( science ) can look for these problems in your DNA. (10) Not only your aunt but also your parents _________( be ) doctors . 3.根据汉语意思完成句子。

1. 除了窗子太小，这房子挺漂亮。

The house is beautiful ______ ________ the small windows . 2. 你的头发和皮肤有同样的基因。

Your hair has ______ _____ _____ _____ your skin. Step 6: Summarize and homework 1. Recite key words ,phrases and so on.

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2. finish off the exercises on the exercise-book 3. Preview lesson 30

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瓜州县第二中学集体备课导学式教案 （

九

）年级（

英语 ）备课组