1、A Lesson in a Lab第二课时一、教学目标1.知识与技能熟练掌握 English numbers，a little, a bit, a lot, rather, no, any, (very) much, lots2. 态度与方法Help the students to read and write some English numbers correctly.Help the students find the main parts of an experiment while they are listening.3. 情感态度与价值观来源:Zxxk.ComHelp the s
2、tudents know the rules of expressing numbers.Help the students guess the main parts of a listening material from the tips.二、Teaching important points 教学重点 Let the students pay attention to the key words in the materials about Aim, Equipment, Method, Result, and Conclusion.三、Teaching difficult points
3、 教学难点Help the students read some large English numbers.四、Teaching methods 教学方法Listening and discussion.五、Teaching aids 教具准备A projector and a recorder.六、Teaching procedures Task 2, Activity 2; Task 3, Activities 3 and 4.Task 1: Activity 1T: Today well learn how to read some English numbers. Please lo
4、ok at Screen 1, Part A. There are some numbers on it. Find the rules and then work in pairs to read them correctly.来源:Z_xx_k.ComScreen 1:A2202002,00020,000200,0002,000,00020,000,000200,000,0002,000,000,000B1221231,23412,345123,4561,234,56712,345,678123,456,7891,234,567,890Several minutes later.T: Do
5、 you find the rules of these numbers?S1: It seems that three zeros are used as a unit.T: Right. How do you read 20,000?S1: Twenty thousand.T: How about 200,000?S1: Two hundred thousand.T: How about 2,000,000?S1: Two thousand thousand.T: Im afraid you are wrong. It should be two million.S1: Sorry, I
6、forget it.T: OK, how about 20,000,000?S2: Its twenty million.T: Right. How about 200,000,000?S3: Thats two hundred million.T: What about 2,000,000,000?S4: That is two thousand million. T: Right. This is the way that English numbers are read. American would like to read like this: two billion. You di
7、d very well. Sit down, please. Now, lets look at the screen. Here is the ways we read English numbers. Please pay attention to the bold face. Thats the unit of the numbers.Screen 2:200 Two hundred2,000 Two thousand20,000 Twenty thousand200,000 Two hundred thousand2,000,000 Two million20,000,000 Twen
8、ty million200,000,000 Two hundred million2,000,000,000 Two thousand million or two billionLet the students read the numbers on Screen 2 and then read numbers in Part B in Screen 1. Let them work in pairs to do the job, and then ask them to read the numbers out individually.S: .T: Now lets look at Sc
9、reen 3. These are the ways we read and write the numbers.Screen 3:22 Twenty-two123 One hundred and twenty-three1,234 One thousand, two hundred andthirty-four来源:Z.xx.k.Com12,345 Twelve thousand, three hundredand fifty-five123,456 One hundred and twenty-three thou-sand, four hundred and fifty-six1,234
10、,567 One million, two hundred and thirty来源:Zxxk.Com-four thousand, five hundred andsixty-seven12,345,678 Twelve million, three hundred andforty-five thousand, six hundredand seventy-eight123,456,789 One hundred and twenty-three mil-lion, four hundred and fifty-sixthousand, seven hundred and eighty-n
11、ine1,234,567, 890 One billion, two hundred and thirty-four million, five hundred and sixty-seven thousand, eight hundred andninety来源:Zxxk.ComTo check whether the students have mastered the way of reading English numbers, let them look at the numbers in Activity 1. There are two mistakes. Let the stu
12、dents read the numbers and find the mistakes.T: Now there are some numbers in Activity 1 on page 42. There are two mistakes in them. Read the numbers and then find the mistakes. After that Ill ask some of you to tell the mistakes.Later.T: What are the mistakes?S1: One is in Number 1. The word “thous
13、and” is missing after “four hundred and seventy”. The other is in Number 2. The word “one” (or “a”) is missing before “hundred million”.T: Quite right. Thats all for Activity 1. Task 2: Activity 2Now, lets turn to Activity 2. Look at the fractions and the way of saying them. Whats the rule?S1: The u
14、pper ones are cardinal numbers and the lower ones are ordinal numbers.T: Right. When do we use plural forms?S2: When the upper one is more than one.T: Right. But the way you are saying is very interesting. In English, what you call “upper one” is called numerator of a fraction; while the “lower one”
15、 is called denominator. Now, lets read these fractions in English: 2/5, 5/8, 9/10, 3/8, 5/6.Students read the fractions.Task 3: Activities 3 and 4T: Now, lets look at Activity 3. Describe the fractions in Activity 2 as percentages. Ask the students to work in pairs to compare their answers. And then
16、 collect the answers from the class.T: Now, look at Activity 4. Read these questions aloud and say the answers. Work in pairs to take turns asking and answering the questions.Give them some help, if some of them have any trouble in doing this. After a while, check the answers with the whole class.If
17、 time permits, finish Activity 5. If not, leave it as homework.Step HomeworkT: In this class we listened to two materials and learned to read some numbers in English. Its hard, but you have mastered all of them. You are terrific! Now, pay attention to our homework: One is to preview Vocabulary on pa
18、ge 46; The other is to finish Exercise 9 on page 93 and Exercise 15 on page 95. For Exercise 15, youd better write them down, so that we can show them out on the screen. Next time, Ill check your answers to these exercises. OK, class is over, see you tomorrow.Ss: See you.七、板书设计Step RevisionStep Listening and WritingStep Listening and Speaking (P95)Step Vocabulary and Speaking 八、教学反思整节课过度自然，各环节环环相扣。教学内容也是难易得体 ，既照顾到了后进生，也满足了尖子生对新知识的渴求，尤其是一些特殊比较级句型和放在比较级前程度副词的拓展，使得学生对比较级的用法有了一个宏观的认识。
