Wonderful Cloning is a popular science article introducing cloning knowledge. The author is Tan Jiazhen, a famous geneticist in China. The article is divided into four parts: firstly, the meaning of cloning is introduced; Secondly, write cloning experiments; Thirdly, the development of cloning technology is described. Finally, I wrote the benefits of cloning to human beings and the thinking of cloning.

Second, the teaching objectives:

1, knowledge target:

A. Learn to read popular science articles and understand cloning knowledge.

B have a preliminary understanding of expository texts and master the methods of reasoning.

2, ability goal:

A. Perceive the text as a whole, screen relevant information and summarize the main points of the article as required, and gradually improve students' ability to read popular science articles.

B clear up the explanation order of articles, explore the writing skills of expository articles, and guide students to explain things in an orderly way.

C. Try to figure out the language, realize the characteristics of this language, such as accuracy, preciseness, vividness and beauty, enhance language perception, and learn to explain things in vivid language.

3. Emotions, attitudes and values:

Cultivate students' interest in exploring scientific mysteries and dialectical thinking ability.

Third, the focus of teaching

1. Make clear the order of text explanation, understand the organization of explanation, train students to quickly filter information and preliminarily summarize the main points.

2. Learn the accurate, rigorous, vivid and beautiful language of this article and experience the vividness of the explanation.

Fourth, teaching difficulties.

1. The structural arrangement is ingenious and novel.

2. The article uses a variety of interpretation methods to explain the scientific truth in a simple way.

Verb (abbreviation of verb) teaching time: two class hours (the second class hour is omitted)

first kind

Teaching process:

First, dialogue import:

The Monkey King is an artistic image that students like. He can do anything. He often pulls out a handful of monkey hairs at critical moments to create a large group of monkeys. Please look at this wonderful description, which is the whimsy of Wu Cheng'en, a great writer in the Ming Dynasty. This was completely impossible before. But now, with the emergence of cloning technology, this impossibility has become possible. So what is cloning? What are the highlights? Today, let's go into the field of "wonderful cloning" (the topic is shown in the courseware). The author of the article is Tan, and read the author's brief introduction by name.

Second, check the preview:

1. Last night, the teacher arranged for you to go home and preview the text. Have you all previewed it? Ok, now please quickly browse the four subheadings of the article and think about what these four parts tell us. (The article is divided into four sections: first introduce the significance of cloning, then write the experiment of cloning, then write the development of cloning, and finally write the benefits of cloning to human beings and the thinking of cloning) (Show the courseware in turn according to the students' answers: significance, experiment, development, advantages and disadvantages)

Third, study independently and explore the content of the text in cooperation.

1. In this lesson, we intend to learn through group cooperation and communication and competition among groups. The teacher has some specific requirements: Please look at the big screen:

2. The leader of each group receives the form and publishes it. (The competition form is attached to the lesson plan)

3. Students cooperate and communicate to complete the questions independently, and teachers patrol.

Fourth, report and exchange, and consolidate the content of the text.

1, report and exchange the contents of major topics. (Courseware appears on the camera)

2. Summary: Now please ask the raters of each group to work out the scores of questions 1 to 6.

Verb (abbreviation of verb) exploration and questioning;

1. Do you have any questions to ask in the article? It can be put forward independently or after group discussion.

2. The teacher shows the courseware according to the students' questions.

3. If students don't question it,

Teachers can also ask questions to students. Lens display courseware.

Summary of intransitive verbs:

1, this article is a popular science article, and the whole article is carried out in logical order. The author vividly explained the profound and cutting-edge biotechnology in plain language. After learning this text, we know some cloned animals and plants, such as crucian carp, frog with black spots and Dolly the sheep. In fact, scientists have cloned far more animals than those listed in our books. Do you want to know? Ok, let's enjoy the cloned pictures (show the courseware)

Just now, let's enjoy the pictures of cloned animals and plants. Now let's look at the big case table of cloning technology.

3. After reading these pictures of cloned animals and the list of major cloning cases, do you have anything to say?

Seven, homework:

Do you have any questions about cloning that we need to discuss next class? Think about it, go back and prepare, and discuss it next class.

The content and knowledge contest of wonderful cloning.

Total score of group scorers

First, write Chinese characters according to Pinyin or write Pinyin according to Chinese characters. (Total 10 points)

Náng () embryo has two q: () j ǐ () vertebrae.

Feed () milk, multiply by y m: n ()

Second, point out what interpretation methods are used in the following paragraphs. (Total score 15)

1. 189 eggs, only two hatched fry, and finally only one young fish survived. After more than 80 days of cultivation, it grew into 8 cm crucian carp. ()

This kind of fish has a "beard" and grows fast, just like carp, but its side scales and spines are the same as carp, and the taste of fish is as delicious as crucian carp. ()

A ewe is like a pharmaceutical factory. ()

3. Read the first part and complete the exercise: (30 points in total)

1, the paper lists plants with cloning ability, such as,,, you know, and so on. (15)

2. The offspring from it are called clones. (6 points)

3. What explanation methods does the author use to explain "What is cloning"? (multiple choices, 9 points)

A, analogy B, explanation C, quotation D, example E, comparison

4. Read the second part and fill in the following form: (Total score: 15)

This part lists examples of successful cloning of fish and amphibians by Chinese and foreign scientists. The success of cloning fish and amphibians naturally makes scientists turn their attention to species, which shows that scientists' pursuit of science is a process of continuous exploration.

Verb (abbreviation of verb) Read the third part of the article and complete the exercise: (6 points in total)

The name of the first cloned sheep in the world is that it was born in 2008.

6. Read the fourth part of the article and answer the questions (24 points in total).

From which three aspects does the text write that cloning technology benefits mankind? (Find out the relevant sentences in the text first, and then summarize them) (8 points for summarizing one aspect)

Seven. Additional questions: (exploring and asking questions)

Note: You can get 5 points for asking and raising valuable questions, and you can get 10 for satisfactorily answering valuable questions.