The worlds population

数字读法的教学建议

　　第49课重点训练大数字的读法，除了要向学生讲清楚读多位数字要注意的规则外，还要引导学生通过练习逐渐熟练地掌握，不要急于求成。本单元话题是世界人口问题，为训练多位数字的读法提供了真实、自然的语言情景。

　　第49课第一、二部分主要是教学多位数字的引入和练习阶段，可用卡片或把数字写在黑板上的方法教学。教师应引导学生总结读数字的规律。

　　Number            Chinese      English

　　l0，000            一万      ten thousand

　　100，000           十万      hundred thousand

　　1，000，000        百万      million

　　l0，000，000       千万      ten million

　　l00，000，000      亿        hundred million

　　l，000，000，000   十亿      thousand million/billion

　　在处理第三部分Ask and answer时，可用世界地图，从中国人口谈起，如：This is China. How many people are there in China? 然后换句话问：What's the population of China? 鼓励学生从上下文中猜测population的词义。引导学生答出：About 1,200,000,000，接下来再问：Do you think it will grow? 等。这样反复练习几个国家后，再让学生打开书分小组做替换练习。

关于阅读课文的教学建议

　　第50课课文“只有立足之地”通过介绍世界人口迅速增长的状况，说明控制人口增长的重要性和必然性。可以在让学生打开书前，问一些有关问题，如：

　　The world's population is growing very fast. This is a big problem.

　　Can anyone tell me why? 引导学生认识到世界人口的迅速增长会带来粮食缺少，就业困难和住房紧张等问题，并由此引出课文题目Standing room only。

　　在解释课文题目时，可以让学生打开书看课文插图，或通过切身体会谈人口多的弊病与生活空间狭小的麻烦。可以引导学生通过阅读课文理解课文题目的含义，也可以先初步了解课文题目的意思预测课文中要谈到的内容。有意识地培养学生利用课文题目和课文插图预测课文内容的能力。在阅读课文前，可以给学生一个快速查阅(scanning)的任务，例如让他们在一分钟内，从课文中找出有关世界人口增长的一组数字。如：

　　the number of babies born in one minute

　　the number of babies born in one hour

　　the world's population two thousand years ago

　　the world's population in 1990

　　阅读课文后，可以让学生分组讨论课文中提出的人口增长的问题，进一步认识到中国实行计划生育(Family planning)政策的必要性和深远意义。也可以做角色表演(Role play)，其中一人是《中学生报》记者，另一人是人口问题专家，小记者和专家可根据课文内容就世界人口问题进行问答，然后互换角色。还可留作家庭作业进一步练习、巩固。

Lesson 49 教学设计示例
Period: The First Period

Content: Lesson 49

Properties: Recorder; Overhead Projector; flashcards.

Teaching Objectives:

　　1. Let the students say the numbers.

　　2. Learn some new words and useful expressions.

Language focus: population, million, billion, increase, grow, What’s the population of Germany?

Teaching Procedures:

　I. Showing tile teaching aims

　II. Revision

　　Revise the numbers between 1 and 100.

　III. Presentation

　　Use flashcards or numbers on the blackboard to revise one hundred, present a thousand in the same way. Then present ten thousand/ a hundred thousand/ a million and a billion

　　Give the students plenty of practice in reading these numbers. Point out the differences between English and Chinese for 10 000 and 100 000.

　IV. Drill

　　Part 1. Play the tape for the students to listen and repeat. Show numbers on the blackboard, to give the students more practice in saying the numbers.

　V. Presentation

　　Present more difficult numbers, then go through the model. Point out how commas are used. Let the students try to say the numbers in this exercise. Hay the tape for the students to listen and repeat.

　VI. Practice

　　Part 3, using a map of the world, go through contents of the table. Learn the meaning of population.

For example:

　　1. Our city has a population of two billion.

　　2. What’s the population of Tianjin?

　　3. China has the largest population of the world.

　　Ask the students some questions, using the model given, e.g.: What’s the population of…? What about the population of…? Finally, get the students to ask and answer in pairs.

　VII. Exercises in class

　　Let the students do enough practice in reading the numbers.

　　Have a dictation.

　　1. What’s the population of France? About fifty - eight million.

　　2. The worlds population(第7页) was about 5 300 million in 1990.

　　3. Nine billion, eight hundred and seventy - three million, four hundred and twenty - five thousand, two hundred and sixty - one.

　　Work in groups

　　Show a picture of the numbers of World’s population. Teacher speak out the na