三角形的内角和的教学设计.doc

三角形的内角和的教学设计一、 教学目标：1.让学生通过个人、小组合作的方式亲自动手，在量、拼等活动中发现、证实三角形内角和是180，并会应用这一知识解决生活中简单的实际问题。2.让学生在鲜活的生活情境中学习，激发其探索欲望，在实践过程中，培养其创新能力和实践能力。3.并通过动手操作把三角形内角和转化为平角的探究活动，向学生渗透“转化”数学思想。4. 通过结论的证实、探究，让学生体验成功的喜悦，激发学生主动学习数学的兴趣。二、重点、难点：1、通过实践活动，使学生知道“三角形内角和是180”这一知识的形成、发展和应用的全过程。三、教学准备：PPT课件、学具。四、教学过程：（一）故事导入：1、课件出示“内角三兄弟之争”的故事，从而引出主题，对这一知识进行探索。2、对“内角和”这一概念进行简单的理解。（二）新授：1、说说三角板的内角各是多少度？计算内角和是多少度？2、猜想：任意三角形的内角和都是180度吗？3、验证猜想：（1）分三组，每组同学拿出事先准备的三角形（三组同学准备的三角形类型不同），各自量出三角形各个角的度数，并标明，再计算出内角和。（2）汇报结果，答案不唯一。（3）继续探究，用拼一拼的方法验证。（4）汇报结果。（5）课件演示验证过程和结果。4、解决“内角三兄弟之争”的疑问。（三）练习：1、扫雷闪电战：详情见PPT课件。2、愿意做老师的小帮手吗？（详情见PPT课件）（四）小结：通过今天的学习你收获了什么？（五）作业：详情见PPT课件。教学反思：这篇教学设计，符合新课程理念，转变学生的学习方式，能让学生以小组合作的形式进行问题的探索与研究，学生在整节课中学得轻松。整节课的教学设计，条理清晰，层次清楚，学生思维活跃，教学从设疑开始，让学生从熟悉的三角板抽象出特殊的三角形探讨三角形的内角和是180度,接下来很自然地引导学生探讨所有的三角形的内角和是不是也是180度，整个过程循序渐进，环环相扣。 在学习活动的过程中，先让学生进行测量、计算，但得不到统一的结果，再引导学生用“拼”的方法进行验证。这时，有部分学生在拼凑的过程中出现了困难，花费的时间较长，在这里用课件再演示一遍正好解决了这个问题。练习设计也是从生活入手，同时注意到练习的梯度，并由浅入深，照顾到不同层次学生的需求。但是受到课本资源的限制，不能大胆突破教材，充分利用生活资源。论述题 1简述邓小平教育思想的主要特征；2简述党的十三大提出的“三步走”战略目标的内容。 参考答案：1邓小平教育思想的主要特征有：教育的战略性；教育的时代性；教育的务实性；教育的阶级性；教育的适应性。 2党的十三大提出的“三步走”战略目标的基本内容是：第一步，从1981年到1990年，实现国民生产总值比1980年翻一番，解决人民的温饱问题。第二步，到20世纪末，使人均国民生产总值再翻一番，人民生活达到小康水平。第三步，到21世纪中叶，人均国民生产总值达到中等发达国家水平，人民生活比较富裕，基本实现现代化。2：单选题1.邓小平教育思想是( )的重要组成部分 A：邓小平理论B：毛泽东思想C：马列主义D：科学社会主义参考答案：A3：单选题2.邓小平抓政治上拨乱反正的一项重要工作是( ) A：推翻“两个估计”B：批判“两个凡是”C：强调实事求是D：坚持调查研究参考答案：B4：单选题3.邓小平抓教育上拨乱反正的一项重要工作是( ) A：批判“两个凡是”B：推翻“两个估计”C：强调实事求是D：坚持调查研究参考答案：B5：单选题4.恢复高考制度是( ) A：1976年B：1977年C：1978年D：1979年参考答案：B6：单选题5.1985年5月19日，邓小平在全国教育工作会议上指出，一个十亿人口的大国，( )，人力资源的巨大优势是任何国家比不可的。 A：经济搞上去了B：生产发展了C：教育搞上去了D：人民富裕了参考答案：C7：单选题6.邓小平指出，知识分子是( )的一部分 A：劳动人民B：人民群众C：工人阶级D：无产阶级参考答案：C8：单选题7.1984年10月，中共中央作出了关于( )改革的决定 A：经济体制B：教育体制C：科技体制D：政治体制参考答案：A9：单选题8.邓小平提出( )是第一生产力 A：科学技术B：.经济建设C：教育卫生D：生产劳动参考答案：A10：单选题9.邓小平理论的精髓是( ) A：改革开放B：发展才是硬道理C：什么是社会主义，怎样建设社会主义D：解放思想，实事求是参考答案：D11：单选题10.1929年，邓小平发动和领导了著名的( ) A：百色起义B：秋收起义C：广州起义D：南昌起义参考答案：A12：单选题11.1997年9月12日，召开了中国共产党( )全国代表大会 A：第十四次B：第十五次C：第十四届五中全会D：第十三次参考答案：B13：单选题12.学习邓小平教育思想的根本方法是( ) A：历史分析法B：调查研究法C：理论联系实际法D：总结经验法参考答案：C1：单选题 The novelist and _ is gong be invited too. A：the poetB：a poetC：poetD：poets参考答案：C2：单选题 I went to _ bed to pick up some papers on it. A：theB：aC： /D：an参考答案：A3：单选题The lady _ a blue dress is my aunt. A：withB：inC：onD：under参考答案：B4：单选题She is going to meet him _ the school gate. A：atB：inC：onD：under参考答案：A5：单选题We should take care of _ old and _ sick. A：the; /B：/; theC：the; theD：/; /参考答案：C6：单选题He has worked for _ hour. A：aB：anC：theD：/参考答案：B7：单选题He is cleverer than _. He can do it better than _. A：me; meB：I; meC：me; ID：I; mine参考答案：C8：单选题 Reading comprehension 2Reading comprehension 2Many teenagers owe the pictures of some football stars because_. A：they are interested in footballB：they are football fansC：they think their favourite players are greatD：all of A, B and C参考答案：D9：单选题 Reading comprehension 2 Reading comprehension 2From the passage, in the picture children drew many things except_. A： people playing footballB：pictures of some football starsC： a sunny skyD： flowers参考答案：B10：单选题 Reading comprehension 2Reading comprehension2In “Dream World Cup”, the children drew the flags of some countries_. A：to show their love for their owe countryB：to tell the people their storiesC：to show their good wishes for the football teamsD： to show their new ideas about football参考答案：C11：单选题 Reading comprehension 2 Reading comprehension 2 The next World Cup will be held in_. A：2006B：2007C：2005D：2004参考答案：A12：单选题 Reading comprehension 2Reading comprehension 2If a country wants to take part in the World Cup, she must have_. A：Many football fansB：a very good teamC：many football playerD：a big playground参考答案：B13：单选题 _ as he is, jack could have made such a mistake. A：A foolB：FoolC：The foolD：Fools参考答案：B14：单选题 I dont have any English books _ this one. A：forB：withoutC：exceptD： from参考答案：C15：单选题 Youd better not _ this in front of the fact. A： ignoreB：denyC： heedD：say no参考答案：B16：单选题 People in a foreign country, sometimes, will lose their _, not knowing who they are. A：wonderB：droughtC：mineralD：identity参考答案：D17：单选题 His monthly expense _ 350 dollars. A：totals toB：amounts asC：adds up toD：accounts as参考答案：C18：单选题 I didnt _ to hurt you. A：meanB： planC：arrangeD：intentionally参考答案：A19：单选题 There isnt enough room for us, _ six dogs and one cat. A：not to sayB： not to mentionC：let it goD：let alone参考答案：D20：单选题 It is said that the gas company will raise the gas fare _ 4%. A：byB： forC：fromD： to参考答案：A21：单选题 It has been raining _ last Saturday. A：onB： forC：tillD： since参考答案：D22：单选题The little girl _ red is very lovely. A：withB：onC：inD：of参考答案：C23：单选题 He is in a difficult situation as all the public opinions are _ him. A：withB：forC：towardD：against参考答案：D24：单选题 1. The professor asked us to write a _ report. A：two-hundreds-wordsB：two-hundreds-wordC：two-hundred-wordsD：two-hundred-word参考答案：D25：单选题 You are not _ anyone in any aspect. A：inferior toB： inferior thanC：more inferiorD：less inferior than参考答案：Reading comprehension 3 Reading comprehension3Mr. Hill taught _. A：Jack Smith French at the No. 2 High SchoolB：Jack Smith to be a first officerC：at the No.2 High School, in FranceD：French some years ago and his name was Smith, not Hill参考答案：D2：单选题 Reading comprehension 3Comprehension 3The second officer says that _. A：Mr. Hill stole the paintingB：a man with a beard, from France, stole a painting in EnglishC：an Englishman took his beard off and stole a paintingD：a man with a beard, from England, stole a painting in Paris参考答案：C3：单选题 Reading comprehension 3 Reading comprehension 3The first officer is sure _. A：Mr. Hill stole the paintingB：he has seen the face in the photo beforeC：he knows the second officers faceD：a man without a beard stole the painting参考答案：B4：单选题 Reading comprehension 3Reading comprehension 3According to the text, Mr. Hill _. A：has a beard on his face but not in his photoB：grew a beard while he was on holidayC：has a beard in his photo but not on his faceD：took his beard off long before he went on holiday参考答案：A5：单选题 Reading comprehension 3Reading comprehension 3Mr. Hill _. A：has just come back from the airportB：is on his way to ParisC：spent three weeks in Paris before he went to FranceD：has been in France for three weeks参考答案：C6：单选题 Many good friends have a lot in _. A：similarityB：differenceC：commonD：usual参考答案：C7：单选题 You will get the message _. A：not long afterB：not longC：before longD：long before参考答案：C8：单选题 The home team _ dearly for their defensive errors. A：costB： tookC：paidD：gave参考答案：C9：单选题 The doctor came at once in _ to my call. A：replyB：answerC：hearingD： listening参考答案：B10：单选题 I wish he would _ his own business. A：careB：lookC：takeD：mind参考答案：D11：单选题 The building which _ at present will be used for science A： is repairingB：has been repairedC： is being repairedD： is repaired参考答案：C12：单选题 Mr. Smith asked Nancy _ it took him to fly to New York. A：how soonB：how oftenC：how longD：how far参考答案：C13：单选题 They are all _ at the _ news. A：exciting; excitedB：excited; excitingC： exciting; excitingD：excited; excited参考答案：B14：单选题 This room is three times _ that one. A：the same largeB：larger asC：as large asD：almost large as参考答案：C15：单选题 I hope you would come to my party _ Saturday. A：the nextB：the lastC： nextD：last参考答案：C16：单选题 . The young man was _ middle height. A：withB：atC：ofD：on参考答案：C17：单选题 Have you found an answer _ the question? A：ofB：forC：onD：to参考答案：D18：单选题 We will try again _ the failure. A： in spiteB：in spite ofC： despite ofD：spite参考答案：B19：单选题 She went away _ saying a word. A：byB：withoutC：out ofD：as参考答案：B20：单选题 He was criticized _ his mistakes. A：onB：withC：ofD：for参考答案：D21：单选题 He prefers white cup to _. A： redB：red oneC： the redD：the red one参考答案：B22：单选题 My teacher today is not quite _. A：his ownB：himC：himselfD：of his own参考答案：C23：单选题 There are trees on _ side of the street. A：anyB：bothC： eitherD：every参考答案：C24：单选题 Last Saturday _ had a picnic in BeiquanPark. A：John, Mary and meB：John, Mary and IC：John, I and MaryD： I, John and Mary参考答案：A25：单选题 Here are a few apples. Would you like to have _? A：onesB：some onesC：one参考答案：CAReading comprehension 4 Reading comprehension 4This passage tells us_. A：how photography was developedB： how to show your ideas and feelings in picturesC：how to take pictures in the worldD：how to use different cameras参考答案：A2：单选题 Reading comprehension 4 Reading comprehension 4Mathew Brady_. A：was very lifelikeB：was famous for his unusual picturesC：was quite strongD：took many pictures of moving people参考答案：B3：单选题 Reading comprehension 4 Reading comprehension 4 If a photographer wanted to take pictures of moving things in the year of 1840j, he had to_. A：watch lots of filmsB：buy an expensive cameraC：stop in most citiesD：take many films and something else with him参考答案：D4：单选题 Reading comprehension 4 Reading comprehension 4The Daguere type was_. A：a FrenchmanB：a kind of pictureC：a kind of cameraD：a photographer参考答案：B5：单选题 Reading comprehension 4 Reading comprehension 4 The first photo taken by Niepce was a picture of _ A：his businessB：his houseC：his gardenD：his window参考答案：C6：单选题 We invited him to the party the next weekend, but he _ the invitation. A：refusedB：returnedC：declinedD：threw back参考答案：C7：单选题 Unwise decisions will lead to _ results. A：unexpectiveB：disastrousC：desiredD：unreasonable参考答案：B8：单选题 The Great Wall in China is one of the _ in the world. A：amazingsB：sceneriesC：wondersD：strange things参考答案：C9：单选题 The natural beauty in Jiuzhaigou will _ your breath away when you visit it for the first time. A：bringB：getC： takeD： frighten参考答案：C10：单选题 We _ them not to go skating on such thin ice. A：replyB：remindC：warnD： recall参考答案：C11：单选题 One day a poor man _ his horse to a tree, and sat down to eat his lunch. A：closedB：tyedC： tiedD：lied参考答案：C12：单选题 The dancer and _ has arrived already. A：singerB： a singerC：the singerD：singers参考答案：A13：单选题 The prisoner _ the charges against him. A： not believeB：opposedC：declinedD：denied参考答案：D14：单选题 His honesty is _. He can be always trusted. A：out of questionB：out of the questionC： not the questionD：in the question参考答案：A15：单选题 There is a truck _ the classroom. A：in the front ofB： in front ofC：in frontD：at the front of参考答案：B16：单选题 Ill never forget _ of 1983 when I entered the college. A： a summerB：summerC：the summerD：summers参考答案：C17：单选题 It is said that the gas company will raise the gas fare _ 4%. A：byB：forC： fromD： to参考答案：A18：单选题 He will graduate from this university _ two years. A：afterB：inC：duringD：for参考答案：B19：单选题 I would like to give you my best wishes _ this happy occasion. A： inB：withC：onD： over参考答案：C20：单选题 The exam will be held _ the end of the term. A：inB： atC： duringD：on参考答案：B21：单选题 There is an old temple_ the foot of the mountain. A： atB：underC：belowD：on参考答案：A22：单选题 Please divide the work _ the two of you. A： intoB：amongC：betweenD：of参考答案：A23：单选题 England and America are _ in many ways. A： likeB： alikeC：aliveD：likewise参考答案：B24：单选题 After a long walk on a hot day, one often feels _. A：exhaustiveB：exhaustingC：exhaustD：exhausted参考答案：D25：单选题 It isnt quite _ that he will be present at the meeting. A：sureB：brightC：certainD： exact参考答案：CReading comprehension 5 Reading comprehension 5Motor homes have become popular because_. A：they can take people to another city when people are freeB： they can let families have a happier life when they go out for their holidaysC：some people think motor homes are cheapD：big families can put more things in motor homes参考答案：B2：单选题 Reading comprehension 5 Reading comprehension 5Americans usually use motor homer_. A：to travel with all the family members of holidayB：to do some shopping with all the family membersC：to visit their grandparents at weekendsD：to drive their children to school every day参考答案：A3：单选题 Reading comprehension 5 Reading comprehension 5 A motor home is usually owned by a family with_. A： a babyB： much moneyC：more than two childrenD：interest in vans参考答案：C4：单选题 Reading comprehension 5 Reading comprehension 5 Before Mr. Hagen an