初一教案_第4单元.doc

Chapter 4 The world of numbersThe first period: words preparationTeaching aims:1. Introduce the words of different kinds of numbers2. To read out all kinds of numbers and symbolsTeaching Difficulties:How to read out the different kinds of numbers correctly and tell them by listeningTeaching focuses:1. Help students to master the new words.2. Help the students to know something about the language of numbersTeaching 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 ,numbersActivity1: 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 studyTask 1:Teach new vocabulary of numbers by showing students some groups of numbers and ask them to find out the rulesCardinal numbers and ordinal numbersOdd numbers and even numbersNumbers showing degreesDecimalsFractionsPercentagesSymbols Task 2: page 44 A Match the words with the signs and numbersTask 3: Teach students to read out Numbers showing degrees, Decimals, Fractions , PercentagesSymbols Step3 : ListeningPage 48 AStep 4: Teach the way of saying “, ,” Task 1: say the followings in English: 78=15 57=35 2917=12 804=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”)HomeworkExercise book :vocabulary ABCThe second period: VocabularyTeaching aims: Master all the new words in this unit.Teaching difficulties:The spelling of new words.Teaching aids:The multimedia and the blackboardTeaching proceduresStep 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 computerTalk 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 11032.班级、年级 Class 6, Grade 9/Form Three3.时间： 6：50 six fifty; ten to seven4.年、月、日： 1986/12/6- December the sixth, nineteen eighty-six5.温度： 36Cthirty-six Celsius degree6.序数： 12th twelfth 14th fourteenthStep4: 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，_ , twentytwo，four，seven，eleven，sixteen，_ , twenty-ninethree , four, seven, eleven, _ four , nine, _ twenty-fiveHomework:Exercise book :vocabulary DThe third period: readingTeaching Aims:1.Learn about numbers from the old world to the present world2.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 numbersTeaching Methods:Individual, pair or group work to make every student work in class.Teaching Aids:The multimedia and the blackboardTeaching Procedures:Step 1 Presentation1 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 Reading1. 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 & E1.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 homeworkExercise Book : ReadingThe fourth period: language Teaching Aims:1. Learn about giving orders or instructions.2. Train the students language ability to use cardinal and ordinal numbersTeaching Important Points:1. Improve the students language ability2. Enable the students to master the words and grammar3. 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 times2 以不同方式 in different ways3由组成 consist of4从到 from to5数字系统 system of numbers6计算机器 calculating machines7在算盘上 on the abacus8电子计算器 electronic calculators9进行计算 do calculation10短时间内/迅速 in a flash11 能够 be able to do12 在你一生的时间里 in your whole life13下面的故事 the following story14解决问题 solve the problems15 够强大 powerful enoughStep 2: Explain some key sentences from the passage1. 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) Dont V. + O以let 引导的祈使句。E.g. Lets 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, wont you结尾。但是以let 引导的祈使句的结尾要注意. Letsshall we/shant we?Let us,will you/wont you?e.g. Dont interrupt me, will you? Lets describe the museum, shall we? Let us go outside, will you?Step 5 Learn some expressions about calculation.Add and /plusSubtractfrom/minusMultiplyby/ multiplied byDivideby/ dividedbyStep 6: cardinal and ordinal numbersPart CStep 7: speaking upHomework:Exercise book: sentence patterns & grammarThe 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 may2. Jim, _ me a hand. A. gives B. is giving C. give D. will give3. Let me _ on duty today. A. am B. / C. be D. do4. Lets _ our time. A. not waste B. no wasting C. not to waste D. no waste5. _ higher, and you will see the house. OK. A. If you stand B. To stand C. When you stand D. Stand6. _ forget to write to me