资源描述
《Chapter4 The world of numbers》
The first period: words preparation
Teaching aims:
1. Introduce the words of different kinds of numbers
2. To read out all kinds of numbers and symbols
Teaching Difficulties:
How to read out the different kinds of numbers correctly and tell them by listening
Teaching focuses:
1. Help students to master the new words.
2. Help the students to know something about the language of numbers
Teaching aids: some paper with different groups of numbers, a tape recorder and multi-media.
Teaching procedures:
Step1 Lead-in and revision：
Encourage students to speak out at least three things that can be understood by all human beings with different language: music , painting, food ,numbers
Activity1: ask all the students to stand up and count the numbers one by one. Each student has a chance to say “pass” and “backwards”.
Activity2: the teacher say :”Page X”, all the students find that page aas quickly as possible. Then the students work in groups of four.
Step2: word study
Task 1:Teach new vocabulary of numbers by showing students some groups of numbers and ask them to find out the rules
Cardinal numbers and ordinal numbers
Odd numbers and even numbers
Numbers showing degrees
Decimals
Fractions
Percentages
Symbols
Task 2: page 44 A Match the words with the signs and numbers
Task 3: Teach students to read out Numbers showing degrees, Decimals, Fractions , Percentages
Symbols
Step3 : Listening
Page 48 A
Step 4: Teach the way of saying “＋,－, ×,÷”
Task 1: say the followings in English: 7＋8=15
5×7=35
29－17=12
80÷4=20
Task 2: choose any to pieces from the cards, ask the students to make the result 10 by using “＋,－, ×,÷”. (the cards J, Q, K are “0”)
Homework
Exercise book :vocabulary ABC
The second period: Vocabulary
Teaching aims:
Master all the new words in this unit.
Teaching difficulties:
The spelling of new words.
Teaching aids:
The multimedia and the blackboard
Teaching procedures
Step 1: write down “0” on the blackboard,
talk about it and present: ancient numbers, consist of , Indian, develop, invent, invention...
show pictures of an abacus and an electronic calculator and a computer
Talk about them and present the new words:
invent invention abacus calculator accurate ...
Step 2: Ask the students to finish Part C1,
PartC2
PartC3.
Part D
Part E
Complete each task individually first and then discuss in groups then in the class.
Step3. Further study.
Learn more expressions about different usage of numbers.
1.房号： 1103 ---- Room 1103
2.班级、年级－－ Class 6, Grade 9/Form Three
3.时间： 6：50－－ six fifty; ten to seven
4.年、月、日： 1986/12/6--- December the sixth, nineteen eighty-six
5.温度： 36°C－－thirty-six Celsius degree
6.序数： 12th －－ twelfth 14th ——fourteenth
Step4: More activities
Activity1; work in groups of four, one student say some numbers from 1 to 1oo quickly, the others write them down as quickly as possible.
Activity2; work in groups of four, one student say some numbers from 1 to 1oo quickly, the others circle them on a piece of paper which is full of different numbers as quickly as possible.
Activity3; fill in the blanks with appropriate numbers.
two，five，eight，eleven，fourteen，______ , twenty
two，four，seven，eleven，sixteen，______ , twenty-nine
three , four, seven, eleven, _______
four , nine, ______ twenty-five
Homework:
Exercise book :vocabulary D
The third period: reading
Teaching Aims:
1.Learn about numbers from the old world to the present world
2.Train the students’ reading ability.
Teaching Important Point:
1.Improve the students’ reading ability.
2.Develop the students’ creative, comprehensive and consolidating abilities.
Teaching Difficult Point:
1.How to improve the students’ reading ability.
2. The use of some useful expressions about numbers
Teaching Methods:
Individual, pair or group work to make every student work in class.
Teaching Aids:
The multimedia and the blackboard
Teaching Procedures:
Step 1 Presentation
1． Ask students how much they know about the world of numbers.
2． Show some pictures of different kinds of calculating machines to the students to arouse their interest.
Step 2 Look and think
Read the title, its subtitle, the headings and the pictures. Then on the list below, tick the tings you think the article may tell you.
Step 3 Reading
1. Give the students some questions about the text.
1. How many kinds of calculating machines are there in the text?
2. What are they?
3. Who first invented and developed the system 1 to 9 system?
4. Was Zero invented first?
5.
Step 4. Find out the fact in Part D & E
1.Li: Everyone knows it.
May : Knows what?
Li: The language of numbers.
2.Li: ______________.
3. Li: ______ ________
4. Li:____________
5. Li:____________
6. Li:______________________.
7. Li:____________
8. Li:____________
Step 5 Consolidation and homework:
1.Read the whole article after the tape.
2.Copy the new words in the article 4 times for each. And memorize them by heart.
Step 6 homework
Exercise Book : Reading
The fourth period: language
Teaching Aims:
1. Learn about giving orders or instructions.
2. Train the students’ language ability to use cardinal and ordinal numbers
Teaching Important Points:
1. Improve the students’ language ability
2. Enable the students to master the words and grammar
3. Develop the students’ creative, comprehensive and consolidating abilities.
Teaching difficult Points:
1. How to improve the students’ language ability.
2. How to use imperative sentences
Teaching Methods:
1. Individual, pair or group work to make every student master the knowledge.
Teaching Aids:
The multimedia and the blackboard.
Teaching Procedures:
Step 1: Further study of the passage.
Task 1: Work in pairs to find out the phrases from the passage.
1.在古代 in ancient times
2 以不同方式 in different ways
3由…组成 consist of
4从…到… from …to
5数字系统 system of numbers
6计算机器 calculating machines
7在算盘上 on the abacus
8电子计算器 electronic calculators
9进行计算 do calculation
10短时间内/迅速 in a flash
11 能够 be able to do
12 在你一生的时间里 in your whole life
13下面的故事 the following story
14解决问题 solve the problems
15 够强大 powerful enough
Step 2: Explain some key sentences from the passage
1. In ancient times, people wrote numbers in different ways.
2. However they nearly all counted in tens.
3. The system of numbers today consist of the number from 1 to 9and 0.
4. Abacus are so fast and accurate that people still use it today.
5. A computer can so a calculation in a flash.
6. She has an amazing brain and can calculate like lightening.
Step 3 Practice reading
1.Ask the students to read the key sentences above after the teacher.
2.Ask the students to read the whole passage after the tape and then together.
Step 4 Language
祈使句 : 是表示请求、命令、建议等句子，通常称为“无主句”。说话的对象是第二人称you, you常被省略。
结构如下：
肯定：(Please) V. + O…
否定：(Please) Don’t ＋V. + O…
•以let 引导的祈使句。
•E.g. Let’s go fishing.
• Let us go out for a walk.
注意祈使句的反意疑问句：一般以will you, won’t you结尾。但是以let 引导的祈使句的结尾要注意. Let’s…shall we/shan’t we?
Let us…,will you/won’t you?
e.g. Don’t interrupt me, will you?
Let’s describe the museum, shall we?
Let us go outside, will you?
Step 5 Learn some expressions about calculation.
Add …and… /…plus…
Subtract…from…/…minus…
Multiply…by…/ …multiplied by…
Divide…by…/ divided…by…
Step 6: cardinal and ordinal numbers
Part C
Step 7: speaking up
Homework:
Exercise book: sentence patterns & grammar
The fifth period: Do some exercises:
I. Choose the best answers.
1. —Call me when you get home.
—OK, ____.
A. I must B. I can C. I will D. I may
2. Jim, _____ me a hand.
A. gives B. is giving C. give D. will give
3. Let me ____ on duty today.
A. am B. / C. be D. do
4. Let's ____ our time.
A. not waste B. no wasting C. not to waste D. no waste
5. —____ higher, and you will see the house.
—OK.
A. If you stand B. To stand
C. When you stand D. Stand
6. _____ forget to write to me when you _____ get there next Tuesday.
A. Don't; will B. Please; will
C. Please; / D. Don't; /
7. Please ___ do it.
A. he B. he let C. let him D. him
8. ____ come in, please.
A. Will B. Do C. Won't D. Did
9. _____ careful!
A. Be do B. Do be C. Not D. Not do
10. _____ let anyone open the door.
A. Don't B. Will C. Not D. No
11. Let John finish the work all by himself,_______?
A. shall we B. will you C. do you D. do we
12. Let’s go home, shall we? _________.
A. That’s right. B. That’s all
C. That’s all right D. All right
II. say out the some numbers as required:
even number
odd number
percentages
numbers showing degrees
decimal numbers
IIIClassify the following numbers
0.54 50% 213 420 40° 3/5 79 40
25° 3/7 17 1,000 76% 75% 852 7.7
21.13 160 ° 7/9 57.22 27 6.5 2005 32.5 °
1.Even numbers______________________________
2.Odd numbers_______________________________
3.Fractions__________________________________
4.Percentages_________________________________
5.Numbers showing degrees_____________________
6.Decimal numbers____________________________
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