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1、-第 1 页集体备课教案模集体备课教案模板板-第 2 页驻马店市第十三中学驻马店市第十三中学2016-2017 学年度第二学期学科:数学教研组长审批:周次:1课题:3.1圆圆序号1备课组九年级主备人岳素贞授课时间2017 年 2 月教学目标11理解确定圆的条件及圆的表示方法;(重点)2掌握圆的基本元素的概念;(重点)3掌握点和圆的三种位置关系(难点)重点理解确定圆的条件及圆的表示方法;(重点)难点掌握点和圆的三种位置关系(难点)教学方法讲练结合教具教学过程一、情境导入古希腊的数学家认为:“一切立体图形中最美的是球形,一切平面图形中最美的是圆形”它的完美来自于中心对称,无论处于哪个位置,都具有同
2、一形状,它最谐调、最匀称观察图形,从中找到共同特点二、合作探究探究点一:圆的有关概念【类型一】圆的有关概念下列说法中,错误的是()A直径相等的两个圆是等圆B长度相等的两条弧是等弧C圆中最长的弦是直径D一条弦把圆分成两条弧,【类型二】圆的概念的应用如图,CD是O的直径,点A为DC延长线上一点,AE交O于点B,连接OE,A20,ABOC,求DOE的度数二次备课-第 3 页解析:探究点二:点与圆的位置关系【类型一】判定几何图形中的点与圆的位置关系在 RtABC中,C90,AB10,BC8,点D、E分别为BC、AB的中点,以点A为圆心,AC长为半径作圆,请说明点B、D、C、E与A的位置关系解析:先根据
3、勾股定理求出AC的长,再由点D、E分别为BC、AB的中点求出AD、AE的长,进而可得出结论解:在 RtABC中,C90,AB10,BC8,ACAB2BC2 102826.AB106,点B在A外;在 RtACD中,C90,ADAC,点D在A外;ACAC,点C在A上;E为AB的中点,AE12AB56,点E在A内方法总结:解决本题关键是掌握点与圆的三种位置关系【类型二】根据点与圆的位置关系确定圆的半径的取值范围有一长、宽分别为 4cm、3cm 的矩形ABCD,以A为圆心作A,若B、C、D三点中至少有一点在圆内,且至少有一点在圆外,则A的半径r的取值范围是_【类型三】在平面直角坐标系中判断点与圆的位置
4、关系如图,O过坐标原点,点O的坐标为(1,1),试判断点P(1,1),点Q(1,0),点R(2,2)与O的位置关系-第 4 页解【类型四】点与圆的位置关系的实际应用如图,城市A的正北方向 50 千米的B处,有一无线电信号发射塔已知,该发射塔发射的无线电信号的有效半径为 100 千米,AC是一条直达C城的公路,从A城发往C城的客车车速为 60 千米/时(1)当客车从A城出发开往C城时,某人立即打开无线电收音机,客车行驶了 0.5 小时的时候,接收信号最强此时,客车到发射塔的距离是多少千米(离发射塔越近,信号越强)?(2)客车从A城到C城共行驶 2 小时,请你判断到C城后还能接收到信号吗?请说明理
5、由解:(1)过点B作BMAC于点M,则此时接收信号最强AM600.530(千米),AB50 千米,BM40 千米所以,客车到发射塔的距离是 40 千米;(2)到C城后还能接收到信号理由如下:连接BC,AC602120(千米),AM30 千米,CMACAM90 千米,BCCM2BM21097千米100 千米所以,到C城后还能接收到信号方法总结:解决本题的关键是能够正确理板书设计圆1圆的有关概念2点和圆的位置关系设O 的半径为 r,点 P 到圆心的距离 OPd,则有:点 P 在圆外dr;点 P 在圆上dr;点 P 在圆内dr.教学反思驻马店市第十三中学驻马店市第十三中学-第 5 页2016-201
6、7 学年度第二学期学科:教研组长审批:周次:课题:序号2备课组主备人授课时间年 月 日教学目标-重点难点教学方法教具教学过程二次备课板书设计驻马店市第十三中学驻马店市第十三中学2016-2017 学年度第二学期学科:教研组长审批:周次:课题:序号备课组主备人授课时间年 月 日-第 6 页教学目标-重点难点教学方法教具教学过程二次备课板书设计驻马店市第十三中学驻马店市第十三中学2016-2017 学年度第二学期学科:教研组长审批:周次:课题:序号备课组主备人授课时间年 月 日教学目标-第 7 页重点难点教学方法教具教学过程二次备课板书设计驻马店市第十三中学驻马店市第十三中学2016-2017 学
7、年度第二学期学科:教研组长审批:周次:课题:序号备课组主备人授课时间年 月 日教学目标-重点难点教学方法教具-第 8 页教学过程二次备课板书设计20162017 学年度第一学期学科:九年级英语教研组长审批:周次:分数:课题:Unit7Where would you like to visit?Section A 1a-1c(period 2)序号备课组Grade 8执笔人授课时间2016 年 月 日教学目标(1)Train students to talk about places they would like to visit with thetarget language(2)Train
8、 students to describe vacations with different adjectives(3)Train studentslistening skill重点Describe vacations with different adjectives难点Talk about different places with the target language教学方法教具教学过程Step 1.1.Check the new words.tiringadj.educationaladj.peacefuladj.fascinatingadj.二次备课-第 9 页thrillinga
9、dj.take it easyFloridatrekv.Amazonjunglen.Niagara FallsWhat kind of places would you like to go onvacation?Step 2.Lets talk and learn.Tell which place youd like to visit and why.A:Where would you like to visit?B:I like to because Step 3.Lets extend and improve.Some useful expressions1.goonvacation2.
10、trek through the jungle3.go trekking4.hope to do sth.5.some day/one day6.go somewhere relaxingStep 4.Lets practice and improve.-Can a plane fly _ theAtlanticOcean?-Yes but it needs to go _ the clouds forhours.(2011 山东烟台)A.across throughB.through acrossC.across acrossD.through through答案:A解析:across,表示
11、从物体的表面“穿过,越过”;through 表示从某物的内部“穿过”。句中“飞越大西洋”要使用 fly across,从云层中“穿过”,要使用 through。The young men walked _ the forestand came to a big river at last.(2009 漳州中考)A.onB.overC.throughD.across选 CThe policeman helped the old woman _the road.(2008 芜湖中考)A.aboveB.acrossC.throughD.over选 BStep5.Lets sum up.-第 10 页
12、板书设计教学反思20162017 学年度第一学期学科:九年级英语教研组长审批:周次:分数:课题:Unit7Where would you like to visit?Section A 3a-4(period 3)序号备课组Grade 8执笔人授课时间年 月 日教学目标(1)Train students to talk about places they would like to visit with thetarget language(2)Train students to describe vacations with different adjectives(3)Train stud
13、entslistening skill重点Describe vacations with different adjectives难点Talk about different places with the target language教学方法教具教学过程Step 1.1.Check the new words.touristyadj.spotlightn.considerv.livelyadj.sightn.includingprep.towern.churchn.convenientadj.undergroundadj.generaln.in generalwinen.translate
14、v.packv.lightadj.Step 2.Read and learn.二次备课-第 11 页1.Where is Paris?2.Are there any beaches?3.What is the most famous sight in Paris?4.Do Frenchmen speak English?5.If you go to Paris,how will you visit the city?6.What do you think of Paris?For your next vacation,why not consider visitingParis?why not
15、 =why dont you 为什么不用于表示提议、劝导等,在 why not?结构中,not 后接动词原形。Why not come and see me tomorrow?=Why dont you come and see me tomorrow?明天来找我怎么样?consider 是动词,意为“考虑,思考”,相当于 think,后面可以接名词、代词、动词-ing 形式或从句。Were considering moving to Seattle.我们考虑搬往西雅图。consider 后面还可以接“特殊疑问词+动词不定式”结构。I am considering what to do nex
16、t.我正在考虑下一步该做什么。consider 还可以意为“认为”,常用于“be considered(as/to be)+名词”或“be considered(to be)+形容词”结构中,意为“被认为是(的)”。Tom is considered(as/to be)a bad student.汤姆被认为是一名坏学生。Jean considered herself(to be)very lucky.琼认为自己非常幸运。consider 用于被动语态,后面还可以接动词不定式,意为“被认为”。Mary is generally considered to work hardest.大家公认玛丽工
17、作最努力。consider 的名词形式为 consideration,意为“考虑”。step 3.Lets extend and improve.-第 12 页Step 4.Lets practice and improve.1.The supermarket is near my home,so its_(方便的)for me to go shopping.2.There is an _(地下的)supermarketin our neighborhood.3.He told a very _(生动的)storyabout his life inAmerica.4.The woman is
18、ill,so she can only do some_(轻的)work.5.Notre Dame Cathedral is one of the mostfamous _(教堂)in the world.Step5.Lets sum up.板书设计教学反思20162017 学年度第一学期学科:九年级英语教研组长审批:周次:分数:课题:Unit7Where would you like to visit?Section B 1a-1c(period 5)序号备课组Grade 8执笔人授课时间2016 年 月 日教学目标(1)Train students to talk about places
19、 they would like to visit with thetarget language(2)Train students to describe vacations with different adjectives(3)Train studentslistening skill重点Describe vacations with different adjectives难点Talk about different places with the target language-第 13 页教学方法教具教学过程Step 1.1.Check the new words.I hope t
20、o visit places where:the people are friendly.the food is delicious.the weather is nice.it has a long history.there is much to do.there are many places of interest.Step2.Learn and talk.Awoman is travellingin a warm place.Agirl is watching agreat whale in the sea.Many kids are playing happily.A:WhLear
21、n and talk.ere would you like to go?B:Id like to go somewhere warm.A:What else can you tell me?B:I dont want Step 3.Lets extend and improve.What else can you tell me?形容词 else 修饰 what 作后置定语。else 与 other 的区别:else 与 other 都可作形容词,else 只用于修饰不定代词、疑问代词和疑问副词,并且必须要位于这些修饰词之后,作后置定语;而 other 用来修饰名词,其位置与 else 正好相
22、反,它位于被修饰的名词之前。What else could I say?我还有什么可说的?There must be somebody else in the classroom.教室里肯定还有别的人。I remember I have read the story in otherbooks.我记得我在别的书上看过这个故事。Step 4.Lets practice and improve.1.We havent _ where to go on holidayyet.2.The girl _ to go to a famous university inBeijing in the futu
23、re.3.I have to _ by myself at noon because myparents arent at home.4.You can find a beautiful park in the _二次备课-第 14 页part of the city.连词成句。1.go,want,where,tomorrow,do,you,else,to_?2.milk,with,we,the,provided,children_.3.how far,it,from,dont,I,mind,is,here_.4.me,suggestions,could,you,give,some_?Step
24、5.Lets sum up.板书设计教学反思20162017 学年度第一学期学科:九年级英语教研组长审批:周次:分数:课题:Unit 7Where would you like to visit?Section B 3a-4(period 6)序号备课组Grade 8执笔人Zhai Haiyan授课时间2012 年 月 日教学目标(1)Train students to talk about places they would like to visit with thetarget language(2)Train students to describe vacations with di
25、fferent adjectives(3)Train studentslistening skill重点Describe vacations with different adjectives难点Talk about different places with the target language教学方法教具教学过程Step 1.1.Check the new words.Ace TravelEasternadjprovidev.firmn.spotn.Confucius二次备课-第 15 页Where would you like to travel?Do you like to trav
26、el alone or with others?Why?What do you think about a trip?Step2.Learn and talk.1.The person has a lot of money to spend onthe vacation._2.The person wants to relax and do nothingon vacation._3.The person is a man._4.The person has children._5.The person likes to swim._6.The personwants to go to ano
27、thercountry._1.Who will the author travel with?2.When do they want to take a trip?3.What place would they like to travel?Step 3.Lets extend and improve.Imagine you work for Ace Travel Agency.Write ane-mail message to S.T.Zhang.Tell where you thinkhe or she should go on vacation.Step 4.Lets practice
28、and improve.Complete the survey using words from the box andany other words.Then survey three students.Agreeon the best place to go.Id like to go to Qufu.B:Why go to Qufu?A:Confucius was born there.Its veryeducational.Step5.Lets sum up.板书设计教学反思驻马店市第十三中学驻马店市第十三中学 中中2016-2017 学年度第一学期学科:九年级英语教研组长审批:周次:
29、分数:课题:Unit 7Where would you like to visit?Section A 3a-4序号-第 16 页(period 4)备课组Grade 8执笔人Zhai Haiyan授课时间2012 年 月 日教学目标(1)Train students to talk about places they would like to visit with thetarget language(2)Train students to describe vacations with different adjectives(3)Train studentslistening skil
30、l重点Describe vacations with different adjectives难点Talk about different places with the target language教学方法教具教学过程Step 1.1.Check the new words.Step2.Learn and talk.For your next vacation,why not consider _ Paris?Paris is the _of France,and is one of the liveliest_in Europe.It doesnt have any beaches or
31、mountains,but there are _many things to do there.For example,it has some fantastic sights,_ theEiffel Tower and Notre Dame cathedral,one of the most_churches in the world.Traveling around Paris bytaxi can_ a lot of money,but its usually quiteconvenient to _ the underground train to mostplaces.In gen
32、eral,though,France is _an expensiveplace.One thing that is not expensive in France,however,is the _.Most people in France have learned_.But many people dont like to speak English,_ in Paris.So unless you speak Frenchyourself,its _to travel with someone who cantranslate things for you.Step 3.Lets ext
33、end and improve.Sample conversation 1:A:Where would you like to go,Kathy?B:Id like to visit Hong Kong.A:Isnt it supposed to be very crowded?B:Yes,it is.But Hong Kong is also veryinteresting and it offers us a lot ofentertainments.Sample conversation 2:A:Where would you like to go,Kathy?B:Id like to
34、visit Mexico City.A:Isnt it supposed to be very relaxing?B:Yes,it is.But Mexico city is alsoexciting.We have a lot of things to do.二次备课-第 17 页Step 4.Lets practice and improve.consider 是动词,意为“仔细考虑,深思熟虑”,后面可接名词、从句、副词,接动词时要用 v-ing 形式。e.g.We considered his suggestion.我们仔细考虑了他的建议。He is considering studyi
35、ng abroad.他正在考虑出国留学。We considered how we should help them.我们仔细考虑应该如何帮助他们。Consider carefully before you decide.你要慎重考虑后再决定。one of+最高级+名词复数,意为“最的之一”。So unless you speak French yourself,its best to travel with someone who cantranslate things for you.所以除非你本人说法语,最好和一个能替你翻译法语的人一起来巴黎旅游。unless 除非,引导条件状语从句。比“ifnot”略微正式。Step 5.Lets sum up.板书设计教学反思