Part I
Teaching requirements:
1. Know and master the words "precarious, refreshing, silent, raging, dawn" and so on.
2. Learn from Yuan Longping's spirit of perseverance, courage to practice and innovation.
3. Experience the character quality through key sentences. Grasp the key words in the sentence and feel the mood of the characters.
4. Read the text correctly, fluently and emotionally.
Teaching focuses on difficulties:
1. Experience Yuan Longping's spirit of persisting in not daring to practice and being brave in innovation.
2. Understand the description of Yuan Longping in the text.
teaching process:
1. revealing the topic and introducing new lessons
1. writing on the blackboard: contemporary Shennong.
2. Do you know what "Shennong" is?
3. Introduction to the teacher: Shennong. (Show the courseware)
Shennong is the legendary inventor of agriculture and medicine.
He was originally the leader of the tribe named Jiang in Jiang Shui Valley. Later, he invented wooden lei as a farm tool, taught people to raise crops, made pottery and textiles, and used fire. Because of his outstanding achievements, he won the king with fire, so he was named Emperor Yan, the world number Shennong, and once built the capital of Qufu, Shandong Province, and was later become the god of agriculture. Shennong once waded through mountains and rivers, tasted all kinds of herbs, and looked for a good medicine to cure diseases and detoxify, so as to save his life. Later, he died of heartbroken eating "Huozizi" by mistake.
4. So, do you know who the contemporary Shennong refers to? (Yuan Longping)
5. Transition: What contribution did Yuan Longping make and was called "the contemporary Shennong"? Today, we will find the answer from the text.
2. Check the preview
1. Read the text by name and section, and sweep away the text barriers.
2. Read the words in this article by name and talk about your understanding of these words.
3. Students talk about their stories about Yuan Longping.
4. Brief introduction of Yuan Longping.
5. Divide the article into four parts and add a subtitle to each part.
part I: fantastic ideas.
Part II: Face up to difficulties.
Part III: Hard search.
Part IV: Success at last.
Third, learn new knowledge
1. Read freely and think: Why is Yuan Longping known as the "contemporary Shennong"? Find out the specific sentences from the text.
courseware presentation: Mr. Yuan Longping's success in cultivating hybrid rice is a great miracle in the world. His achievements have brought good news to mankind. Mr Yuan Longping is the founder of hybrid rice and the father of hybrid rice in the world.
(1) Read this sentence together. What did you learn from this sentence? I realized that Yuan Longping was a man who made China proud, and his achievements attracted the attention of the world and made Chinese people proud. )
Do you know what the word "miracle" means? Miracle: an unexpected and extraordinary thing. )
(3) Why is the success of hybrid rice cultivated in Yuan Longping a miracle of the world? Because in the whole world, this is an insurmountable problem. Before that, no one succeeded. Now, we have finally succeeded in cultivating hybrid rice in Yuan Longping, China, which is unexpected and attracts worldwide attention, so it is called a miracle. )
Next, let's review the text and learn about this contemporary Shennong. Please look at the first part of the text and ask the students to read paragraphs 5, 6 and 7 softly. Which word do you think is the most touching?
in danger, worried and worried
2. Can you tell me the meaning of these two words? (worried: describes the appearance of anxiety. Anxious: anxious)
3. Why is Yuan Longping worried? What's the hurry? Read the text by name.
4. Show supplementary information.
A worrying famine
In 1959, due to a major mistake in formulating the national agricultural production plan, the grain sown area in China decreased by 13% that year; Coupled with the invasion of natural disasters, the grain yield per mu is deeply affected; In 196 and 1961, although the sown area of grain increased, the total national grain output in 1961 decreased by 53 billion Jin compared with that in 1959 due to the intensification of natural disasters and insufficient investment in agricultural funds.
affected by the grain output, the per capita ration supply in rural and urban areas in China decreased year by year in 1959. In addition to a limited amount of rice and flour, people eat more corn, sorghum, dried sweet potatoes and food substitutes (bran, lotus root residue, roots, wild vegetables, taro stalks, elm leaves, etc.). Cooking oil and meat were scarce. In 196, rural hukou could only supply 3 kg of oil and 2.4 kg of pork per capita per year.
due to the serious shortage of supply, there is a large-scale famine in the whole country. According to Contemporary China Anhui, from 1959 to 196, the population of China decreased by 1 million people ... < P > 5. Yuan Longping was worried about the famine in China, but worried about the people's lack of food. What does it mean? (showing his feelings of worrying about the country and the people)
6. Who can read this sentence with his own feelings? Evaluation: You paid attention to these two words, so you read them well. From your reading, I deeply feel Yuan Longping's feelings of caring for the country and the people < P > 7. Direct reading. Faced with this situation, an amazing idea suddenly sprouted in Yuan Longping's mind: ... < P > Fourth, intensive reading taste
1. Talk: How did Yuan Longping realize his wonderful idea and become a contemporary Shennong that the world praised? Everyone previewed the text and knew about Yuan Longping. There is a word in the book that shows that he has experienced many difficulties. What word is it? . (Guide the students to say "A hundred robberies and thousands of difficulties" on the random blackboard: A hundred robberies and thousands of difficulties) What does "a hundred robberies and thousands of difficulties" mean? ("robbery" and "difficulty" both mean difficulties and setbacks, and "hundred" and "thousand" describe many difficulties he has experienced.) What difficulties and setbacks did he encounter? Read the second, third and fourth parts of the text silently, underline the relevant sentences, read them, and simply write down your feelings next to them
2. Communicate and show the relevant paragraphs by camera < P > Face up to difficulties and dare to challenge < P > However, rice hybridization is an unprecedented worldwide topic with great difficulty. Many foreign researchers who have had this idea have given up or interrupted their research after hard work. Many western scholars assert: "It is ignorance of genetics to engage in hybrid rice." However, Yuan Longping, the son of Shennong, has to chew on this "hard bone".
① The abandonment of foreign researchers and the assertion of western scholars have invisibly put pressure on Yuan Longping ... (camera blackboard writing: external pressure)
② But Yuan Longping, the descendant of Shennong, has-(has to gnaw at this hard bone)
What does "hard bone" mean in the text? (hybrid rice)
why is it called a hard bone? (Rice hybridization is an unprecedented worldwide topic with great difficulty)
That's right. Do you know what "unprecedented" means? (Never done before)
But Yuan Longping decided to-("chew")
③ What word can be used instead of "chew"? (Bite, chew) Can I exchange it? Why? (Because "gnawing" can better show that it is difficult to overcome)
④ Western scholars have balked at a world-wide big topic that no one has done before. It is such a "hard bone" that Yuan Longping has to "gnaw". What do you feel? (Face difficulties, dare to challenge, dare to try, not afraid of difficulties) Random writing on the blackboard-Face difficulties, dare to challenge, dare to try, dare to challenge
⑤ If you read these words well, you will certainly be able to read sentences well. Who will try? (Guide students to read aloud)
Evaluation: The teacher heard that you reread the "hard bones", which made me feel that this is Yuan Longping who is facing difficulties; Rereading "unluckily," this is a Yuan Longping who dares to try, and "gnawing" this is a Yuan Longping who dares to challenge difficulties.
He looks hard and perseveres.
He rolls up his trouser legs, steps on the mud, holds a magnifying glass on his head, and looks for a needle in a haystack one by one in the rice field. The scorching sun tanned his skin; Knife-like rice leaves made his face, hands and legs itch and ache; Sweat, like a note, drips through the rice leaves and drops into the water. He's looking, looking!
on the first day, I couldn't find it.
the next day, I couldn't find it.
on the third day, I still couldn't find it.
after more than ten days, the male sterile plants disappeared. It has to be baked in the hot sun for ten days in a row. Yuan Longping's skin is darker.
day after day, year after year, six years have passed. Yuan Longping traveled all over China.
① You are good at reading, and you know how to grasp key words to help you understand the text
② Read this part again, and see which word can best show the difficulty of finding. What does a needle in a haystack mean in the text? Looking for male sterile plants is like looking for a needle in the vast sea, which is enough to show difficulties.
And those words are difficult. You analyzed them well. Can you read them with your feelings?
③ Rendering: The teacher seems to see that under the scorching sun, Yuan Longping is sweating like rain. He is bent and hunched ... What kind of scene do you seem to see? (refers to students' narration)
④ Who can imagine the scene at that time and read this part?
⑤ It's such a hard time for Yuan Longping to find, find ... (Introduction) How long did it take? (six years)
⑥ it's six years, a year is 365 days, what about six years? (Immediately writing on the blackboard) For 219 days, you went through all kinds of hardships to find a "male plant". What did you feel at this time? (Hard to find, persistent and persistent) Random blackboard writing-(persistent) Who will read this paragraph with your feelings? -
⑦ In the past six years, Yuan Longping only looked for it in one place? Instead, I have traveled all over half of China. What do you mean, I have traveled all over? (I have traveled all over every inch of land and every corner, which is called running all over)
Summary: In order to find a male sterile plant, after 219 days, I have traveled all over half of China. Let us feel Yuan Longping's perseverance again, and let us find it hard with Yuan Longping (read this passage together)
Excessive: From the fourth part of the article, you can still feel what difficulties Yuan Longping has experienced.
regardless of safety, it finally succeeded
It was a gloomy evening ... The sewage was mixed into a ball
1. During ten years *, man-made destruction made Yuan Longping cry bitterly. Why did he cry bitterly and suffer? ("Ten years *" almost ruined all his experimental results, and the rice seedlings were destroyed) Blackboard Book: Ten years *
2. This disaster made everyone feel sad, but what surprised us was that Yuan Longping's assistant saved four bowls of rice seedlings. What kind of rice seedlings were these (they were recovered for the rest of their lives)? What was Yuan Longping's attitude in the face of these four bowls of rice seedlings?
under the dim light of night, Yuan Longping was holding four bowls of rice seedlings that survived the robbery, feeling sad and happy, stroking them like a loving mother.
① what do you fully realize from this sentence? (cherishing rice seedlings and loving scientific research achievements)
② Who can read this sentence affectionately?
③ Summary: During the "Ten Years *" period, everyone was in danger, but Yuan Longping was only concerned about his scientific research and achievements. What kind of person do you think he is? (Regardless of personal safety, regardless of personal gains and losses, love science) Random blackboard writing: Regardless of safety
Transition: In the process of studying hybrid rice, it can be said that there are many difficulties. Yuan Longping withstood the pressure of western public opinion and searched for male sterile plants as hard as looking for a needle in a haystack. After ten years of man-made destruction, he survived setbacks again and again, suffered repeated blows, and persisted in his pursuit. Finally, in 1975.
(2) Interlanguage: So what benefits did the successful development of hybrid rice bring to mankind? (refers to reading 32.32 paragraphs)
(3) Interlanguage: Yuan Longping has finally achieved impressive results. How do international friends evaluate him? Read the beginning and end of the article and find out the relevant sentences. (Random blackboard writing: the fifth contribution) < P > (4) Summary: The success of cultivating hybrid rice is not only the glory of Yuan Longping, but also the pride of the Chinese nation and a miracle that benefits mankind. Yuan Longping's great spirit of devoting himself to the cause of science regardless of personal gain and loss, and his great contribution to mankind all show that he is worthy of being a "contemporary Shennong"
Fourth, summarize the full text and understand the structure of the article
1. What are the characteristics of this text in writing?
(flashback technique is adopted throughout this article. At the beginning, it highlights the great significance and high praise of the successful cultivation of hybrid rice, and also arouses readers' interest in reading. )
2. What's the use of writing like this?
(it can better highlight the great spiritual quality of the characters. )
V. Assigning homework
Organize the deeds of Yuan Longping and accumulate more deeds of scientists. Prepare for the "My Favorite Scientists' Deeds Exchange Meeting"
Part II
Teaching objectives:
1. Learn new words in the text, especially understand and accumulate four-character words.
2. Feel Yuan Longping's dedication to the cause of "rice hybridization" and his spirit of perseverance, courage and struggle for scientific research.
3. Read the key sentences with emotion.
teaching process:
first class
1. problem solving:
teacher: what do you want to know after reading the topic?
second, read the text silently, tell me what you have read, and can you ask questions you don't understand. (Teachers randomly solve)
Third, recognize new words.
1. teacher: which words are easy to mispronounce and write, please ask the students to mention them.
The teacher draws the students' attention to the writing of these two words: abuse and sunrise
Pay attention to the pronunciation of these two words: burning fen meng
2. Say the words according to the meaning:
It is very dangerous to describe, and it is about to overturn or perish. ()
a very sad mood. ()
I'm so anxious that my heart is burning like a fire. ()
tossing and turning in bed can't sleep. ()
I survived the disaster. ()
all kinds of voices are quiet. ()
Fourth, group discussion:
Teacher: Give each of the four parts of the text.