Teaching design and thinking of biological invaders

As a teacher, he is usually asked to write teaching design, which is a planned and decision-making activity to achieve teaching goals. So how to write instructional design? The following is my teaching design and thinking about biological invaders, hoping to help you.

Teaching design and thinking of biological invaders 1 teaching objectives

1, learn the interpretation methods and characteristics used in the article, and understand the interpretation order commonly used in rational interpretation articles.

2. Use learning methods to screen and sort out materials, so as to improve the reading and writing ability of expository texts.

3. Understand the ecological knowledge and common sense of biological pollution introduced in this paper, and improve the awareness of prevention. Cultivate students' scientific spirit of seeking truth and innovation, scientific attitude of attaching importance to evidence and scientific thinking method.

Teaching focus

Learn the interpretation methods and characteristics used in this paper, understand the logical interpretation order commonly used in things interpretation, use learning methods to screen and sort out materials, and initially master the ability to write simple things explanations.

Teaching time

1 class hour.

Students preview

1. Read and write after class, take notes, explain and make sentences about new words.

2. Use books, internet and other means to collect information about biological invasion.

teaching process

First, create situations to introduce new lessons.

1. Multimedia display: pictures of fine varieties introduced from China, such as watermelon, corn and tomato. Students say the names according to the pictures.

2. Multimedia shows some pictures of biological intruders.

3. The significance of solving the invasion.

Explanation: In the introduction of the new lesson, the author originally imagined that Galileo crashed into Saturn, which was a recent event at that time, as a topic for human beings to avoid biological invasion. The school-based teaching and research group believes that in the situational interactive teaching method, the design of introducing new courses is not wide, and students' interest in learning texts can not be fully mobilized before class. At the suggestion of Mr. Lin Xuan, the topic will focus on the exotic species that students are familiar with every day. Beautiful multimedia pictures create suspense and stimulate students' interest in learning texts and exploring biological invaders. The effect of the actual class proves that this modification has fully mobilized students' learning initiative and played a good role in the interaction between teachers and students in the classroom.

Second, the interaction between guidance and learning.

1, reading: students read the text and think about problems by themselves;

(1) What harm will biological intruders bring?

⑵ What are the causes and ways of biological invasion?

(3) What is the attitude of biologists towards biological invasion?

(4) What measures have countries around the world taken against biological invasion?

2. discuss:

(1) Order of discussion articles:

Students answer thinking questions, complete the structural framework of the article, understand the interpretation order of the article, and the role of this interpretation order: make the interpretation orderly and conform to people's understanding of things.

Causing biological invaders (topic)

Pretend to be a biological intruder (phenomenon)

Biological invasion explores the logical order of biological invasion.

Reveal the attitude of biologists.

Take corresponding preventive measures.

Interpretation: The teaching purpose of this session is to make students understand the interpretation order of the article: logical order. Teacher Wang Gaiying, a school-based research group, suggested that students understand the interpretation order of articles more intuitively through the structural framework of articles. Therefore, this frame diagram was added in the second draft.

(2) Discuss the explanation method of the article:

Students find out the sentences that use column numbers, examples and metaphors in the article. And talk about their expression effect.

3, teachers and students * * * with induction:

(1) The logical order makes the expository text more organized and conforms to the law of people's understanding of things.

⑵ Proper use of explanatory methods makes the article vivid, vivid and more attractive.

(3) Discuss materials and parody.

Discuss the information about biological intruders collected by a four-person group, imitate the explanation order and method in the article, and reorganize the materials to explain a biological intruder. And form an outline.

Third, expand and extend.

1, say:

Group representatives came to the stage to talk about the results of the discussion. (Multimedia display related pictures and materials, and the group will send representatives to explain the outline. )

2. Write:

Homework: According to the group discussion and organizing materials, introduce the biological invaders you are interested in, write an article of about 400 words, pay attention to the appropriate explanation methods, and follow a certain order.

Teaching reflection

Tell me, I will forget; Show it to me and I will remember it; Let me in, and I will understand. Tell me, and I will forget; I remember what was shown to me; Let me participate in the research, so that I can understand. )

-[America] Benjamin Franklin

Practice makes true knowledge, which is the guiding concept of my teaching design. Only when students personally participate in practice can they have a deeper image of knowledge and truly master it. Therefore, in teaching, teachers should provide students with opportunities to participate in knowledge learning while imparting and displaying knowledge. This is also the purpose of imitating writing exercises in Chinese class. Students learn to strike while the iron is hot, so that students can acquire a method and a skill in class. Chinese is not an intuitive subject. How to turn a very abstract writing idea into a very operational and intuitive exercise has become the focus of this course design. The teaching process mainly focuses on reading, discussion and oral English, paving the way for writing. Read the text; Students and teachers discuss the understanding of the text and related knowledge together; Talk to the students in the group about the information you collected; Finally, write imitation. A very important teaching purpose of this paper is: let students learn the common interpretation methods and logical interpretation order of rational interpretation, and train students' ability of selecting materials. Explain that order is the old knowledge that students have learned as a solid knowledge training.

Strengthening the application of explanation method is a highlight of this teaching process. Because the knowledge of this article has been seen and learned by students in biology class. If you just talk about knowledge, it is easy to teach Chinese as a biology class. Therefore, teaching emphasizes the knowledge of Chinese. Show in:

1, text analysis emphasizes one of the elements of expository writing: explanatory method.

2. When students introduce biological invasion data, they strengthen the application of explanatory elements in language expression. After a student introduced the material, the students commented on the explanatory elements used in the material. In expanding teaching, let students consciously imitate the writing in the text to organize the materials, and students select the materials at hand according to the characteristics of induction. Summarize the first-hand information through the discussion of the group members. In the conversation session, students come to the stage to explain the materials, which is not only the training of students' oral expression, but also the extension training of classroom content. So as to achieve the purpose of writing in the teaching of this course.

In the use of media, it is particularly worth mentioning that, considering the uncertainty of students' on-site answers, the method of hyperlink is adopted in the production of this courseware, which effectively avoids the panic of temporary switching.

Of course, there are many unsatisfactory places in this course, and some details need to be discussed, such as understanding the ecological knowledge and common sense of biological pollution introduced in this paper for teaching purposes and improving the awareness of prevention. Cultivate students' scientific spirit of seeking truth and innovation, scientific attitude of attaching importance to evidence and scientific thinking method. This point is not prominent enough. Words lack time to emphasize. Originally, I wanted to use the method of interspersed explanation to stop it flexibly, but it was ignored in actual classroom teaching.

expert review

Teacher Lin Xuan, the chief teacher of Chinese Language Group, commented: This teaching design is closely related to the unit teaching goal, which reflects the requirement of the new curriculum standard to pay attention to cultivating students' spirit of seeking truth and innovation. The design of teaching links, especially embodies the student-centered curriculum requirements. Reading, speaking, discussing and writing let students participate in the cognitive process. Effectively cultivate reading ability. Create a situation to stimulate reading interest, take inquiry and cooperation as the main line of training, and let students read the explanatory text in the process of obtaining information and screening information, and in the process of questioning and solving problems. Therefore, this teaching design is reasonable and innovative.

Teacher Huang Nai Xi, deputy director of the school's teaching department, comments: This teaching case highlights the idea of double-subject exploration and experience of school-based topics. Teachers and students communicate and explore in class, and students cooperate in training. Let the students learn something from a lesson. Take the text as an example to expand students' writing ability of expository writing. Let students participate in it and master the use of language vividly. But the fly in the ointment is that students' participation is not wide enough, and what they show on the stage can only represent the words of one family. If they can randomly comment on students' works, they will be able to take care of them comprehensively.

Teacher Cai Rong, head of the Chinese teaching and research group, commented: This class fully mobilized the initiative and enthusiasm of students' autonomous learning. On the basis of fully understanding the function of logical order and explanation methods, students began to practice writing and achieved the combination of speaking and practicing. Students can really gain something in class. It is worth emphasizing that the emphasis on basic knowledge in the teaching process is still insufficient and needs to be improved.

Teaching design and reflection of biological invaders (II) Teaching objectives

1. Understand the ecological environment knowledge introduced in this article and the situation of biological invaders.

2. Clear the order of this article, grasp the content of the article as a whole, and improve the reading ability of popular science.

3. Analyze the interpretation methods used in this paper to achieve its expressive effect.

Emphasis and difficulty in teaching

Make clear the interpretation order of this article and master the interpretation methods used in this article.

teaching process

Introduction of new lesson

Design intention: let students know the learning tasks of this lesson.

What is "biological invasion"? You may not be familiar with this. You know, this is a war initiated by human beings without smoke, which cannot but arouse our high vigilance. Today, we will go into the battlefield and make an inspection of this "war".

First, independent inquiry-preview and communication

Design intention: This session aims to make students perceive the text as a whole.

1. Read the text carefully and circle the new words in the text.

Robbery (jié) plunder (qι) profit (fān) hedge blame (Jiι) gorgeous (lán)

2. Understand the key words in the text.

(1) Explain the following words.

You can't escape from fate: you are doomed to suffer, and you can't escape from it (superstition). Bad things are bound to happen now, and they are inevitable.

Helpless: metaphor has no way.

Indifference: I am not touched at all; Not at all tempted.

Colorful: brilliant and colorful.

(2) In the following sentences, one of the misspelled words is (d)

A. I heard that Xiao Lin was admitted, and she was psychologically unbalanced, and the past came to mind again.

B.it came so suddenly that she seemed helpless.

C. if the natural environment is seriously damaged, all life will be destroyed.

D. despite the teacher's repeated persuasion, she remained indifferent.

3. According to the expression of the text, give the definition of "biological invader".

"Biological invader" refers to a creature who originally lived in a foreign country and moved to a new ecological environment by unnatural means, destroying the new ecosystem.

4. What biological intruders are mainly mentioned in the article?

Communication points to spotted shellfish, longicorn beetles, red ants, palm snakes and so on.

5. How does the author call these intruders vividly?

Communicate with immigrants and stowaways.

6. Why are "immigrants" who move to the new ecological environment called "invaders"?

Communication is because they not only destroy the original ecosystem, but also may cause immeasurable economic losses to human society.

7. What are the reasons for the increase of biological invaders?

Communication points to the increasingly prosperous international trade.

8. What are the conditions for uncontrolled reproduction of a species in a new living environment?

Communication is free from the competition of the same species and the harm of natural enemies.

Second, read the text. Cooperation and exploration

Design intention: Teachers and students can solve problems together through independent cooperative learning, questioning and discussion.

Read the text quickly, circle, dot, tick and draw, filter out valuable information from the text and think:

1. What is the "biological intruder" introduced in the article?

Exchange the definition, characteristics, harm, reasons and ways of "biological invaders", different people's views on "biological invaders" and preventive measures.

2. What is the order in which this article introduces this knowledge? What are the advantages of using this order?

This paper explains AC dialing in logical order. Starting with the explanation of the concept of "biological invader", this paper introduces the harm that "biological invader" brings to human beings, its destructive effect on the ecological environment, the reasons for its formation, the different views of the scientific community on "biological invader" and the measures taken by various countries in the world at present. Basically, it is carried out in accordance with the logical thinking of asking questions, analyzing problems and solving problems. Explaining things in this order conforms to the general law of people's understanding of things.

3. What is the main idea of this article?

By introducing the knowledge that biological migration may cause harm to human beings through unnatural ways, people are reminded to pay attention to the consequences of biological invasion and study corresponding measures.

Do you know what explanation methods are used in this article? Tell me about their benefits.

Ac dialing

(1) column number.

For example, "Since World War II, nine species of native birds in Guam 1 1 have been wiped out by brown snakes, and the number of the remaining two species of birds is decreasing day by day, which is in danger of extinction at any time."

The change of this figure clearly shows the harm of "biological invaders" to the natural ecology.

Another example is: "In the United States alone, the economic loss caused by' biological invaders' is as high as more than 200 billion US dollars every year", which shows that' biological invaders' do great harm to human beings.

Summarize the figures to make the article true and accurate.

(2) give an example.

(1) An example of dandelion and fish and shrimp in a mountain stream with very limited breeding time and spatial span.

It is proved that: "In the early days of human civilization, land and navigation technologies were not developed, and the ecological balance of nature was not greatly damaged."

(2) European spotted shellfish, Asian longhorn beetles and red ants from South America invaded North America.

It strongly illustrates the great harm that "biological invaders" bring to mankind.

(3) An example of palm tree snakes almost killing birds in Guam.

Explain the destruction of natural ecology by "biological invaders"

④ Examples of fresh fruits and vegetables and transnational pets.

In order to explain the man-made reasons of "biological invaders".

⑤ An example of the bill passed by the US House of Representatives to strengthen inter-departmental monitoring of vehicles that may carry exotic species.

It shows that all countries in the world have taken corresponding measures to deal with "biological invaders".

The purpose of summarizing examples is to support the point of view and make it more convincing.

(3) Give an example.

The concept of "biological invader" is metaphorical in itself, telling people that this kind of "invader" behavior will bring harm to human beings and nature.

The spread of pests around the world through trade routes is compared to "hitchhiking in transnational trade", which shows the convenience of "invaders" and the difficulty of prevention.

summary

These metaphors make the explanation more vivid, vivid and attractive to readers.

Teacher's summary

Summarize the expression effect of various interpretation methods.

For example, support the content of the explanation through specific examples and enhance the persuasiveness of the article.

Number of columns: the use of numbers makes the language very accurate and conforms to the scientific characteristics of explanatory writing.

For example, vivid explanation can also arouse readers' interest (enhance the interest of the article).

5. Appreciation of key sentences.

(1) "These stowaways mixed in the goods at the bottom of the warehouse did not attract the attention of the local people, so they were randomly abandoned in the waters near the Great Lakes. Unexpectedly, however, it has become a' paradise' for bamboo. " What are the rhetorical devices for adding words? Talk about its function.

Ac dialing

Metaphor is a rhetorical device used to add some words. These two sentences vividly show that Bambusa bambusa unconsciously landed on the North American continent, where she did harm to human beings wantonly, boldly and wantonly, without the restriction of natural enemies, vividly and aptly.

(2) "Without the restriction of natural enemies, the number of scallops has increased dramatically, and almost all the drainage pipes in the Great Lakes have been occupied by them." Do you think it is more accurate to add the words "almost" and "all" and remove one of them? Why?

Ac dialing

Cannot be removed. Because the word "complete" can show the speed and quantity of species reproduction, while the word "almost" can show the tightness of the author's language expression. If you remove any of them, you can't achieve such an expression effect.

(3) "Some pets from other places, such as snakes, lizards and bobcats. Often escape from the fence due to the negligence or abandonment of the owner and gather in the mountains to harm one party. " What are the advantages of adding words?

Ac dialing

Roaring in the Mountain is full of interest, which makes people fully feel the destructive power of "biological invaders" to the natural ecological environment, emphasizes the seriousness of this matter, and does not make the reasoning too serious and solemn.

Summary after class

The Biological Intruder is an expository article, which explains things in a logical order, with clear organization and proper explanation methods. It is a normative expository article, and its writing method is worth learning from for beginners. The knowledge about biological pollution introduced in this paper should be learned to use, improve awareness of prevention, strengthen ecological awareness, understand the value of local natural scenery, and resist the invasion of foreign creatures.

Self-examination/introspection

This lesson is a self-reading exposition of Unit 4 in the first volume of Grade 8. According to the characteristics of teaching materials and students, I set the following three teaching objectives:

1, understand the main content of this article.

2. Learn the explanation order and method of this article.

3. Improve students' awareness of environmental protection.

Judging from the actual class situation, I think the class of biological invaders is reasonable:

First, the new curriculum standard mentions "paying attention to improving students' moral cultivation and aesthetic taste" in many places. This lesson is a good text for moral education and improving students' awareness of environmental protection. The new curriculum standard also emphasizes "cooperation and inquiry" in study and life, and this class can cultivate students' ability in this respect. In this course, I try to combine the two organically. I set the following three thinking questions in the "experience reflection" link:

1. What other "biological invaders" do you know?

2. What shall we do

3. How do people get along with nature? Write a slogan. The way of cooperative learning is that the students in the class form four study groups, cooperate with each other and divide their work reasonably to accomplish this learning task together. This way of learning not only enables us to obtain rich learning materials, but also absorbs other people's good learning methods. Through this link, students' awareness of environmental protection is also imperceptibly improved.

Second, rational use of teaching media and integration of teaching. The object of this lesson is biological invaders. After introducing the new class, I arranged a link called "Do you know me"? It shows the creatures mentioned in the article, please identify them. This not only stimulates students' interest in learning, but also mobilizes the classroom atmosphere. On this basis, the overall perception of the text is effective.

Thirdly, arouse students' initiative and enthusiasm in autonomous learning. Because students have been exposed to expository texts many times in their previous studies, they have a certain understanding of the characteristics of expository texts. Therefore, in teaching, I am not telling students what I want to teach you in this class, but letting students think for themselves what I can learn from this text. Facts have proved that most students have understood the essence of expository learning, that is, the content, method and order of explanation.