UNIT 3 Lesson 17教学详案—冀教版中学英语八年级下

UNIT 3　Animals Are Our Friends
Lesson 17: Save the Tigers
设计说明 首先通过一个猜谜游戏将学生引入新课，然后借助图片介绍老虎的种类并让学生思考老虎的现状。在学习课文前先通过图片和例句学习生词，然后通过阅读匹配段落大意，对文章有整体了解；之后，通过阅读每个段落找出支持段落大意的句子、阅读回答问题、阅读查找短语等活动达到对文章的理解。接下来让学生讨论如何保护动物。 最后，讲解本课的重要知识点并通过当堂检测进行巩固练习。本节课从多个角度、多种形式上对本课的语言知识进行练习，从而达到教学目的，实现教学目标。 教学目标 通过本课节的教学，学生达成以下目标： 1. 知识目标 掌握单词：century, courage, brave, reason, kill, cut 接触单词：fur, symbol, chain, balance, disappear, decrease 短语：at the beginning of…, drop to, food chain, in balance, in danger, cut down, as well 2. 能力目标 能用英语谈论保护老虎的话题。 3. 情感目标 保护野生动物，爱护环境。 重点难点 1.重点：掌握本课节中的重点单词、短语及句型。 2.难点：能用英语谈论保护老虎的话题。 教学准备 PPT 课件。 授课时数 1课时 教学过程 Step 1　Warming up 1. Ask students to guess a riddle: It usually has orange fur（毛）and dark stripes（条纹）. It is the king in the animal world. What animal is it Answer: Tiger. 2. Ask students: How many types of tigers do you know Then introduce the six types of tigers with the help of pictures. There are currently six types of tigers: the Bengal tiger, the Siberian tiger, the Sumatran tiger, the Malayan tiger, the Indochinese tiger and the South China tiger. 3. Ask students to think about: Where can you usually see a tiger Do you think tigers need our help Why or why not Step 2　Presentation 1. Teach students to learn about the new words century, courage, brave, reason, kill, cut, fur, symbol, chain, balance, disappear, decrease with the help of pictures and sentences. 2. Let students read the new words aloud for some times in order to remember them. 3. Let students practice the new words. century　fur　brave　courage　chain　reason　disappear　cut　decrease
（1）We 　　　　 paper with scissors. （2）I’d like to know the 　　　　 why you love your pet dog so much. （3）The plane flew higher and higher till it 　　　　 in the sky. （4）The tiger is the symbol of 　　　　. （5）The 　　　　 man jumped into the cold river and save the boy. （6）The number of the tigers in the wild quickly 　　　　 these years. （7）Our life has become better in the 21st 　　　　. （8）The 　　　　 on the bear is dark brown. （9）The little girl wears a gold 　　　　 around her wrist（手腕）. Answers: （1）cut　（2）reason　（3）disappeared　（4）courage （5）brave　（6）decreases　（7）century　（8）fur　（9）chain Step 3　Reading 1. Let students read the lesson and match each paragraph with its main idea.(Let’s Do It! No.1 ) Answers: Above 2. Let students read the lesson again and find some sentences to support the main idea of each paragraph. (Let’s Do It! No.2 ) 3. Ask some students to speak out their answers. Answers: 　　“Save the tigers” is a group of volunteers. These volunteers hope to save the tigers of the world. At the beginning of the 20th century, the number of tigers in the wild was around 100 000. But today that number has dropped to a few thousand. 　　Tigers live in the forests of Asia. They usually have orange fur and dark stripes. Tigers are symbols of strength and courage. In many stories, they are brave. The tiger is at the top of the food chain. It helps keep the number of other wild animals in balance. For this reason, tigers are important to the environment. 　　In recent years, tigers have been in danger of disappearing. Some people hunt and kill tigers for money. People have cut down a lot of trees as well. As forests disappear, tigers lose their homes. The number of tigers in the wild is quickly decreasing and we must do something about it. 4. Ask students to read the lesson again and answer the questions. (1)How many tigers were there at the beginning of the 20th century (2) Where do tigers live (3) What do tigers symbolize (4) What is the reason tigers are important to the environment (5) Why do people hunt and kill tigers (6) Aside from their being hunted and killed, what is another reason tigers are disappearing Answers: (1) Around 100 000. (2) They live in the forests of Asia. (3) They are symbols of strength and courage. (4) Because tigers help keep the number of other wild animals in balance. (5)They are for money. (6) People have cut down a lot of trees as well. As forests disappear, tigers lose the homes. 5. Let students read the lesson by themselves and find the following phrases . Then translate them into Chinese. at the beginning of 在……之初 the number of………的数量 drop to 下降到；跌至 be symbol of…是……的象征 at the top of…在……的顶端 food chain食物链 in balance保持平衡 in danger处于危险状态 cut down把……砍倒；减少 as well（除某事某人外）还，也 Step 4　Project Work in groups and discuss some ways we can protect animals. Write down your ideas. Step 5　Language points 1. At the beginning of the 20th century, the number of tigers in the wild was around 100 000. 在20世纪初，野生老虎的数量大约是10万只。 辨析: the number of与a number of (1)the number of意为“……的数量”, 后接可数名词复数, 但中心词是number, 所以若作主语，谓语动词要用单数形式。 (2)a number of意为“许多; 大量”, 相当于a lot of或lots of,中心词是该短语所修饰的可数名词复数, 所以作主语时, 谓语动词用复数形式。 The number of students in our school is about 2 000. 在我们学校，学生的数量是大约2000人。 A number of students like playing basketball after school. 放学后许多学生喜欢打篮球。 2. It helps keep the number of other wild animals in balance. 它帮助保持其他野生动物的数量平衡。 balance在句中用作名词, 意为“平衡; 均衡”, 常用短语有： in balance 保持平衡 be out of balance 不平衡 keep/lose one’s balance 保持/失去平衡 The boy keeps the see-saw in balance. 这个男孩让跷跷板保持平衡。 You must learn to keep your balance in skating. 在滑冰时你必须学会保持平衡。 I lost my balance and fell. 我身体失去平衡，摔了一跤。 3. In recent years, tigers have been in danger of disappearing. 近年来, 老虎已经面临消失的危险。 in danger (of)意为“处于（……）危险之中”。 You’re in danger of catching a cold. 你有患感冒的危险。 The sick man is in danger of death. 那个病人有死亡的危险。 The passengers are in danger! Let’s go and help! 旅客们处于危险之中！咱们去帮忙吧！ Step 6　Homework 1. Recite the new words and expressions. 2. Preview Lesson 18. 当堂达标 根据汉语提示完成句子 1. 　　　　 students is about twenty. (……的数量) 2. It’s 　　　　 your health. (对……是重要的) 3. The wild animals are 　　　　 now. Let’s protect them.（处于危险中） 4.They 　　　　 a tree to make furniture. （砍倒） 5. 　　　　 the party, he gave me a gift. (在……之初) 6. The temperature has 　　　　 below zero. (下降到) 7. It is at the bottom of the 　　　　. (食物链) 8. You know, computers bring troubles 　　　　. (也) 答案： 1. The number of　2. important to　3. in danger　4. cut down　5. At the beginning of　6. dropped to　7. food chain　8. as well 板书设计 Unit 3　Animals Are Our Friends Lesson 17: Save the Tigerscentury, courage, brave, reason, kill, cut, fur, symbol, chain, balance, disappear, decreaseat the beginning of…, drop to, food chain, in balance, in danger, cut down, as well
教学反思