人教新目标 (Go for it) 版八年级下册Section A说课ppt课件

Period 1 （Section A 1a-2d）

设计说明

　　在学习1a之前，先复习简单数字的读法，再学习较大的有规律的数字，然后是较复杂的大数字，循序渐进地教会学生大数字的读法。这样做可以降低学生学习的难度，提高学生的学习兴趣。1a-1c是本单元的导入部分。在1a-1c的教学过程中，教师需要引导学生把学过的比较级和最高级的句式结构迁移到量的表达法上。2a-2c的重点是听说的教学，要求学生听懂大数字的表达，并明确听到的形容词比较级、最高级的不同表达句式，并能尝试运用听到的比较级、最高级结构进行问答。在让学生读2d时，首先可以用简笔画的方法教新单词，排除阅读障碍，提高学生兴趣。然后，设置问题引导学生理解对话，并帮助学生解决难题。最后指导学生分角色朗读，完成语言输出。

教学目标

　　1. 知识目标

　　（1）掌握单词和短语：square，meter，deep，desert，population，Asia，tour，tourist，wall，amazing，ancient，protect，wide，man-made；feel free，as far as I know。

　　（2）掌握句型：①What is the highest mountain in the world? ②The Yangtze River is about 6，300 kilometers long and the Yellow River is 5，464 kilometers long. ③It’s a lot bigger than the population of the US. ④Did you know that China is one of the oldest countries in the world? ⑤As far as I know，there are no other man-made objects as big as this.

　　2. 能力目标

　　掌握大数字的读法和表示量的结构，能熟练掌握和运用单词square，meter，deep等来表达物体的长、宽、高、深和面积。

　　3. 情感目标

　　培养学生对大自然的热爱，以及对我们祖国的自豪感。

重点难点

　　1. 重点：

　　（1）掌握本课时单词、短语。

　　（2）掌握大数字的读法和表示量的结构。

　　2. 难点：

　　掌握大数字的读法和表示量的结构。

教学准备

　　多媒体课件，录音机，磁带。

教学过程

　　Step 1　Leading in

　　First play a video of Qomolangma，then ask the following questions：

　　—Do you know the mountain?

　　—What’s its name?

　　—How high is it?

　　—It’s 8，844. 43 meters high. （write 8，844. 43 on the blackboard）

　　—How do you read the number? Now，let’s learn the large numbers together.

　　Step 2　Presentation

　　1. Have students read the small numbers flashed on the screen.

　　2. Teach the following numbers.

　　（from the right to the left）The first comma means thousand；the second comma means million.

　　3. Practice reading the following numbers.

　　4. Teach the new words：square，meter，deep，desert.

　　Step 3　Practice

　　1. Show the pictures in 1a on the screen. Ask students if they know these places. Then teach：Qomolangma，the Nile，the Caspian Sea，the Sahara.

　　2. Look through the chart.

　　3. Have students match the facts individually.

　　4. Check the answers.

　　Answers：

　　5. 用英语表达下列数量。

　　（1）45米高：forty-five meters high

　　（2）3米深：three meters deep

　　（3）4 238千米长：four thousand two hundred and thirty-eight kilometers long

　　（4）5米宽：five meters wide

　　（5）25 000平方米：twenty-five thousand square meters

　　Step 4 　Listening

　　1. Work on 1b.

　　（1）Look through the sentences in 1b and predict the answers.

　　（2）Play the recording for the first time. Have students pay attention to the key words while listening. Write some key words if necessary.

　　（3）Play the recording again. Students listen and fill in the blanks.

　　（4）Check the answers.

　　Answers：1. higher　2. the biggest　3. the deepest

4. the longest

　　2. Work on 1c.

　　（1）Read the conversation in 1c.

　　（2）Use the information in 1b to make conversations. Students work in pairs.

　　（3）Ask some pairs to act out their conversations.

　　3. Work on 2a.

　　（1）Have students read the numbers and look through the  sentences in 2a.

　　Teach the new words：population，Asia.

　　（2）Play the recording twice. Students number the facts for the first time，and then check their answers for the second time.

　　（3）Check the answers.

　　Answers：4，2，1，3

　　4. Work on 2b.

　　（1）Before playing the recording，have students read each sentence and predict the answers.

　　（2）Play the recording and have them fill in the blanks with the numbers in the box.

　　Answers：6，300　5，464　5，000　300（从上到下）

　　（3）When reviewing the correct answers with the class，have students raise their hands if they predict the answers correctly in advance.

　　（4）Play the recording and have students listen and repeat.

　　5. Work on 2c.

　　（1）Retell the facts and make comparisons.

　　A：Did you know that China is one of the oldest countries in the world?

　　B：Yes，I did. It’s much older than my country.

　　（2）Have the students use the information in the following chart and make sentences.

　　（3）Ask some pairs to show their conversations.

　　6. Complete the following sentences.

　　（1）世界上最高的山是什么？

　　 What’s the highest mountain in the world? 

　　（2）珠穆朗玛峰有8 844. 43 米高。

　　Qomolangma is 8，844. 43 meters high.

　　（3）它比美国的人口要多得多。

　　It’s a lot bigger than the population of the US.

　　（4）中国几乎和美国一样大。

　　China is almost as big as the US.

　　（5）中国是世界上最古老的国家之一。

　　China is one of the oldest countries in the world.

　　Step 5　Role-play

　　1. Presentation.

　　（1）Draw some pictures on the blackboard to teach the new words and phrases：tour，tourist，wall，amazing，ancient，protect，wide，feel free，as far as I know.

　　For example：

　　T：Look at this picture. Can you guess the meaning of “protect”?

　　Ss：保护。

　　（2）Practice reading the new words and phrases.

　　（3）Check them.

　　a. Choose the right words according to the pictures.

　　      ①deep　　　       　②desert

　　      ③wall　　　　　   ④tour

　　     ⑤protect　　　           ⑥wide

　　b. Complete the words or translate the phrases according to the Chinese meanings.

　　①平方；正方形：sq uare

　　②米；公尺：mete r

　　③人口；人口数量：population

　　④亚洲：A sia

　　⑤令人大为惊奇的：amazing

　　⑥古代的；古老的：ancient

　　⑦（可以）随便（做某事）：feel free

　　⑧就我所知：as far as I know

　　2. Read the conversation and answer the following questions.

　　（1）What are they talking about?

　　The Great Wall.

　　（2）How long is the Great Wall if we are only talking about the parts from the Ming Dynasty?

　　It’s about 8，850 kilometers long.

　　（3）Why did the ancient emperors build the Great Wall?

　　The main reason was to protect their part of the country.

　　（4）Are there other man-made objects bigger than the Great Wall?

　　No，there aren’t.

　　（5）Which is the most famous part of the Ming Great Wall?

　　Badaling is the most famous part of the Ming Great Wall.

　　3. Students work in groups. Read the conversation again，and try to comprehend the conversation.

　　As students work，move around the classroom and give students necessary help.

　　4. Play the recording. Students listen and repeat.

　　5. Students work in groups to role-play the conversation. As students work，move around the classroom offering language support.

　　6. Ask several groups to role-play the conversation.

　　7. Complete the passage from memory.

　　The Great Wall

　　If we are only talking about the parts from the Ming Dynasty，the Great Wall is about 8，850 kilometers long. This makes it the longest wall in the world. The ancient emperors built it to protect their part of the country. It’s quite tall and wide. There are no other man-made objects as big as this. The most famous part is Badaling，and it is part of the Ming Great Wall.

　　Step 6　Cooperative inquiry

　　Discuss the following language points in groups and fill in the blanks.

　　1. 英语中表示量的方法

　　数词+表示单位的名词+ 形容词，如：

　　100 meters long 一百米长

　　1，000 meters deep 一千米深

　　2. population的用法

　　（1）population常与定冠词the连用，作主语时，谓语动词常用第三人称单数形式。

　　The population of China is about 1. 4 billion.

  中国的人口大约14亿。

　　（2）当主语是表示“人口的百分之几、几分之几”时，谓语动词用复数形式。

　　About twenty percent of the population in this area are workers. 这一地区大约20%的人口是工人。

　　（3）表示人口的“多”或“少”，不用“much”或“little”，而要用“large”或“small”。

　　India has a large population. 印度人口众多。

　　（4）询问某国、某地具体的人口数时用“What’s the population of...? ”。

　　What’s the population of Canada?

  加拿大的人口有多少？

　　3. 大数的表达与读法

　　1 000以上的基数词的表示法：先从右至左数，每三位数加一个逗点（即以此把数目分为若干段）。第一个逗点前的数为thousand（千），第二个逗点前的数为million（百万），第三个逗点前的数为billion（十亿）。

　　（1）2，483 two thousand，four hundred and eighty-three

　　（2）68，340 sixty-eight thousand，three hundred and forty

　　（3）832，295 eight hundred and thirty-two thousand，two hundred and ninety-five

　　Step 7　Summary

　　In this lesson，we have learned：

　　1. new words：square，meter，deep，desert，population，Asia，tour，tourist，wall，amazing，ancient，protect，wide，man-made.

　　2. Phrases：feel free，as far as I know.

　　3. Sentences：

　　（1）What is the highest mountain in the world?

　　（2）The Yangtze River is about 6，300 kilometers long...

　　（3）It’s a lot bigger than the population of the US.

　　（4）Did you know that China is one of the oldest countries in the world?

　　（5）As far as I know，there are no other man-made objects as big as this.

　　Step 8　Homework

　　1. Read and memorize the new words and phrases in this lesson.

　　2. Preview the new words and phrases in Section A 3a-4c.

板书设计

教学反思