《较复杂的小数乘法》是第九册第一单元《小数的乘法和除法》的第三节。本 节课的教学内容是教科书第3页的例3、例4。这一教材是在学生学习了小数乘法的意义(小数乘以整数、一个数乘以小数)、小数乘法的计算法则以及小数点位置 移动引起小数大小的变化的基础上进行教学的,它是小数乘法计算法则的引伸和补充,同时也是学生今后进一步学习小数四则混合运算的基础。本节课 的教学目的是:1、使学生进一步掌握小数乘法的计算法则,懂得在点积的小数点时,乘得的积的小数位数不够的,要在前面用0补足;2、使学生初步掌握“当乘 数比1小时,积比被乘数小;当乘数比1大时,积比被乘数大”;3、培养学生的计算能力,自学能力和概括能力。本节课的教学重点是:让学生掌握在定积的小数 时,位数不够的会用0补足。
2、试做例题,掌握转化方法明确转化原理后,让学生试算例题。在试做的基础上引导学生进行观察比较,抽象出转化时小数点的移位方法,最后概括总结出移位的法则。具体做法如下:1、我认为小数除法如果按照教材按部就班教学有点不合理的,不利于学生从整体上把握小数除法,不利于学生对知识的建构。因此,我选择了重组教材。(把例5例6有机的结合在一起的同时也新增加了一个例题,那就是被除数小数位数比除数的小数位数多)。例5、例6和新增加例题的教学,引导学生概括总结出转化时移位的方法,同时在此基础上归纳出除数是小数的除法计算法则。在得出计算法则后,还要注意强调:(1)小数点向右移动的位数取决于除数的小数位数,而不由被除数的小数位数确定。(2)整数除法中,两个数相除的商不会大于被除数,而在小数除法中,当除数小于1时,商反而比被除数大。
除数是整数的小数除法的计算步骤和试商方法与整数除法基本相同。它是在整数除法的基础上进行教学的。又是学生以后学习小数除法的基础,必须沟通小数除法和整数除法的联系,抓住新旧知识的连接点,紧密结合现实情境,展示学生对小数除法计算方法的探究过程,突出计算方法的教学,在掌握计算方法的同时更要理解算理。二.教学目标:1.通过自主探究、合作交流,理解小数除以整数的计算方法。2.正确地进行小数除以整数的计算,并能解决简单的实际问题。3.培养学生比较、分析和归纳等思维能力;以及类比、迁移的学习能力。4.通过学习活动,培养积极的学习态度,树立学好数学的信心。5.让学生感受数学与生活的密切联系,培养学习数学的兴趣。重点难点:正确地进行小数除以整数的计算,并能解决简单的实际问题是本课的重点,本课的难点是理解小数除以整数的计算方法,理解小数点为什么要对齐。
在学习本课内容以前,学生已经系统地学习了整数四则混合运算和小数四则计算,为本节课内容的学习打下了基础,由于小数四则混合运算的运算顺序同整数四则混合运算的运算顺序完全一样,针对这一点,本课教学确定的教学目的是使学生熟记小数四则混合运算顺序,提高计算能力。使学生熟练地掌握小数四则混合运算的运算顺序,正确、迅速地进行小数四则混合式题的运算,是本课的教学重点。教学难点是:1.能否正确把握运算顺序。2.能否正确标明根据以上教学目的,为了更好地突出重点,突破难点,在教学中遵循大纲的要求,从简单入手。例1是最简单的两步计算题,让学生熟悉一下运算顺序。再过渡到较复杂的问题。例2是三步计算带小括号的较复杂的四则混算题,在运算过程中出现了除不尽的情况,应说明计算过程中,当除得的商超过两位小数时,一般只需保留两位小数,再进行计算。最后进入到教学重点、难点阶段。
三、总结规律、形成概念通过学生积极讨论,充分调动了学生的积极参与学习,既发挥了学生学习的主动性,又培养了学生的发散性思维,引导学生总结出:有的分数可以化成有限小数,有的分数不可以化成有限小数,请同学们再看一看什么样的分数可以化成有限小数?什么样的分数不可以化成有限小数?启发学生从分母的最小公倍数着手。 最后总结出:一个最简分数,如果分母中只含有素因数2和5,再无其它素因数,那么这个分数就可以化成有限小数,否则就不能化成有限小数。 例题2,请把下列小数化成分数,说说你是怎样把小数化成分数的? 0.06,0.4,1.8,2.45,1.465, 归纳:(学生为主,教师点拨)1、原来有几位小数,就在1后面写几个零作分母。原来的小数去掉小数点作分子。2、小数化成分数后,能约分的要约分。常用的因数是2和5。 对于小数如何化成分数的题目,课前了解到学生在小学时已学过把小数如何化成分数的方法,因而以学生练习为主,加以操练并巩固,有错误的及时纠正。
3、归纳求最小公倍数的方法。师:想一想找“共同的休息日”和“总人数”的过程,说一说可以怎样求两个数的最小公倍数?(①找倍数:从小到大依次找出各个数的倍数;②找公有:把各个数的倍数进行对照找出公有的倍数;③找最小:从公有的倍数中找出最小的一个。)4、看书88——89页,你还有什么问题?师:观察一下,为什么6和8这两个数不相同,却可以写出相同的公倍数呢?公倍数与原有的这两个数有什么关系?公倍数与它们的最小公倍数又有什么关系?教师画出数轴表示6和8的倍数,并可生动地比喻6宝宝步子小,要走3次才能到达24的位置。而8宝宝步子大,只要走两次就到达24的位置。到达24的位置后,6宝宝和8宝宝就碰面了。可见公倍数24是6和8的不同倍数。三、解决问题,深化理解(练习是理解知识,掌握知识,形成技能的基本途径,又是运用知识,发展智能,完善认知结构的重要手段。
(五)课堂小结四、说班会过程:(一)谈话导入:小朋友们,你知道世界上最珍贵的是什么吗?(生命)当有同学回答说是生命时,师说:“对,就是生命!生命对于我们每个人来说只有一次,所以生命是最可贵的,但是它又是最脆弱的,有时会在那不经意的一瞬间,生命的泉水便会永远消失,所以,本次班队课,老师想和你们一起讨论一下如何爱惜生命、注意安全。”(二)出示一些安全事故的资料 视频和图片资料师过渡:近些年来,发生在学生中的安全事故很多,造成了多少学生死亡,拆散了多少个幸福的家庭,使多少父母痛不欲生!下面请同学们看看这些视频和图片资料(以上设计意图是通过学生视觉和听觉的感官,切身感受生命很脆弱、安全很重要,激发他们提高安全意识)
亲爱的xx:上周一的大课间活动,我校为在xx首届校园广播体操视频比赛中获得荣誉称号的班级,颁发了奖状及奖品。秉承“我们不一样,我们都很棒”的评价理念,我校为12个教学班,设置了不同的奖项名称——示范奖、奋进奖、鼓励奖,让每个班级都得到自己的长处奖项。周一下午的教职工大会上,我校举行了xx六一儿童节文艺汇演总结及颁奖盛典。我们采取电影颁奖的形式,邀请xx教师当开奖嘉宾,每一个班都有奖项:最佳编创及表演奖、最佳指导组合及外宣奖、最佳人气奖、最佳师生同台奖、……每开一个奖,全体xx热烈鼓掌,甚至还有尖叫。最后一个上台开奖的是已有数月身孕的xx教师段蓉珍。她开奖的项目是最佳编创及表演奖。获得该奖的是班诗歌朗诵《我的祖国》、班情景舞蹈《跪羊图》、班歌伴舞《一二三四歌》。颁奖典礼结束后,我校组织参加高考监考工作的老师开会,进一步明确监考责任,确保监考顺利进行。此次监考,我校共有28名教师参加。周二上午的大课间活动,来自XX区xx镇学校乡村少年宫近二十名师生,在校长敬正江的指挥下,为xx全体师生表演了抖空竹、舞狮、魔术绝活。该校特聘的民间艺人,年逾花甲的王怀奇,带领弟子们,将抖空竹绝活,以令人惊叹的手法一一展现。如天籁般的空竹声响,轻脆明亮的回荡在我们的耳畔。从空中掉落,稳稳落在牵引绳上的空竹,令人眼花缭乱。
老师们、同学们:最近一个时期以来,一些地方的学校安全事故陆续出现,而且重大恶性事故增多。教育部通报了近期各地一些学校发生的安全事故:月日清晨,山西省长治市沁源县二中组织初二、初三两个年级的学生在公路上跑操,在学生返校途中,一辆东风带挂货车由于司机疲劳驾驶,直接撞向跑操学生队伍,酿成了一起特大交通事故,目前事故共造成名学生和名教师死亡,名学生受伤;月日,四川省巴中市通江县广纳镇中心小学晚自习课下课时,发生拥挤踩踏事故,造成名学生死亡、名学生受伤;月日,两名犯罪嫌疑人将湖南衡阳市南岳区小学学生文某以其母亲生病为由从学校骗出,随后向其家长勒索赎金。月日民警将歹徒抓获时,发现这位小学生已经死亡。这些血的教训,究其原因,一方面是当前整体社会安全工作严峻,社会治安情况复杂,一些事故是“天灾人祸”所致;另一方面是由于一些学校安全工作松懈麻痹,责任不落实,工作不到位所造成,还有一部分是由于一些学生安全意识、防范意识不强,缺乏自护、自救的能力而导致伤害事故的发生。
The topic of this part is “Write about your festival experience”.During the Listening and Speaking and Talking, students are just asked to say out their festival experiences such as the Spring Festival, Mid-autumn Day, but this part students will be asked to write down their own festival experiences. During the reading part, it introduces the Naadam Festival in Inner Mongolia Autonomous Region, which can give students a good example to imitate. Students not only learn the festival, but touch and feel the Inner Mongolian’s character, the spirit and cultural atmosphere, which can help students form the cultural awareness and learn to enjoy and value the diversity of Chinese culture.Concretely, the dairy tells the experience that the author spent the Naadam Festival in Inner Mongolia Autonomous Region with his/her friend. The structure is clear. In the opening paragraph, it introduces the topic of the Naadam Festival and the whole feeling. Then it introduces the items of the festival like the ceremony, wrestling and horse racing. Finally, it summarizes this experience. Because this part is a travel journal, we must guide students pay more attention to these details: 1. use the first person. 2. use the past tense to tell the past thing and use the present or future tense to describe the scenery. 3. use the timeline to tell the development. 4. be careful for the author’s psychology, emotion and feeling, etc.1. Read quickly to get main idea; read carefully to get the detailed information about Naadam Festival.2. Learn the structure of the reading article and language.3. Write an article about a festival experience4. Learn to use the psychology, emotions and feeling in the writing.1. Write an article about a festival experience.2. Use the structure of the reading article and language.
Listening and Speaking introduces the topic of “talking about how to become an astronaut”. This period is aimed to inform students some details about the requirements of being an astronaut. Students can be motivated and inspired by the astronauts. Teachers ought to encourage students to learn from them and let them aim high and dream big.Listening and Talking introduces the theme of "talk about life in space". This part also informs students more details about life in space and can inspire students to be curious about this job. 1. Guide students to listen for numbers concerning dates, years and ages etc2. Cultivate students' ability to talk about how to become an astronaut and life in space ; 3. Instruct students to use functional sentences of the dialogue such as “ first of all, I am not sure, so what might be .. I guess.. I wonder…I am curious…)appropriately.1. Guide students to understand the content of listening texts in terms of the whole and key details; 2. Cultivate students' ability to guess the meaning of words in listening; discuss with their peers how to become a qualified astronaut and describe the life in space.Part 1: Listening and SpeakingStep 1: Lead inPredictionThe teacher can ask students to predict what the listening text is about by looking at the pictures.About how to become an astronaut./the requirements of an astronautStep 2: Then, play the radio which is about an interview a. And after finishing listening for the first time, the students need to solve the following tasks.
Q4: What is the function of the International exploration ?Having astronauts from different countries on boardQ5: What can you learn from Para 4 ?China has made great achievements in exploring spaceQ6: What is the attitude to the space exploration ?SupportiveStep 6 Post reading---RetellPeople have always wanted to learn more about space. Before the mid-20th century, most people felt (1)_________ (travel) into space was an impossible dream. However, (2)____ the help of scientists, peoplesucceeded in realizing their dream (3) _________ (explore) space. On 4 October 1957, the Sputnik 1 satellite (4) ____________(launch) by the USSR. (5) ________________ scientists try to make sure nothing goes wrong, accidents can still happen. These disasters made everyone(6)___________(disappoint), but people still believe in the importance of (7) ________(carry) on space exploration. In 2003, China became the third country to (8)_____________ (independent) send humans into space. Then Shenzhou 6 and 7 completed (9)____ second manned orbit and the first Chinese spacewalk. In spite of the difficulties, scientists hope future (10)__________ (discovery) will not only enable us to understand the universe but also help us survive well into the future.Answers: 1. travelling 2. with 3. to explore 4. was launched 5. Although6. disappointed 7. carrying 8. independently 9. a 10. discoveriesStep 6 Post reading---Critical thinkingQ1: What do you think of the space exploration ? I think it is beneficial to us. Through further study of space, people will make full use of it in the future, such as the space experiments by Wang Yaping in Tian Gong 1.Q2: If you are determined to be an astronaut, what should you prepare at present ?First of all, I should study hard to get a related college degree. Besides, I must keep mental and physical healthy.Step 7. HomeworkTry to summarize the structure of the article by a mind map.
另一方面,其余的人反对这个计划,因为它可能会导致一些不好的影响。7.I hold the belief that space exploration not only enable us to understand how the universe began but also help us survived well into the future.我坚信探索太空不仅能够使我们了解宇宙的起源而且能够帮助我们更好地走进未来。8.I think we should spend more time and money exploring space so as to provide new and better solutions to people's shortterm and longterm problems.为了给人类的短期和长期问题提供更新和更好的解决方法,我认为我们应该花更多的时间和金钱来探索太空。9.From my point of view,it is wrong of young people to depend on their telephones too much,which may do harm to both their physical and mental health.在我看来,年轻人过度依赖手机是不对的,因为它们可能会对他们的身心健康都有害。最近你班同学就“人类是否应该进行宇宙探索”这个问题进行了激烈的讨论。有人认为,探索宇宙不仅让人类更好地了解宇宙的发展,还可以用来指导农业生产,以及把一些探索太空的高新技术用于现实生活;也有一些人认为探索太空花掉了大量的人力物力;影响了人们的生活水平。请你根据以下情况写一篇报告并发表自己的观点。注意:1.写作内容应包括以上全部要点,可适当发挥,使上下文连贯;
Everybody wants to get wealth.In today’s material world,making money or becoming wealthy symbolizes a person’s success and capability. Many people just make every effort, pay any price to attain greater wealth. With money,they can buy nice, large apartments in nice neighborhood. With money they can own luxurious cars. Wealth seems to bring all happiness in life.But is wealth the only road to happiness? Not really. There are many things in the world, which are beyond the means of money, such as friendship, love, health and knowledge. People are so preoccupied with struggling for money that they have no time or would not take the time to form or maintain friendship. What happiness can they feel living as lonely miserable creatures without love or friends in the world even if they accumulate tremendous wealth?In my opinion, people can’t do anything without money, but money is not everything. What money will bring you depends on your personal belief and goal in life. If you are kind enough to help others, especially the poor, money is a good thing to you. With it, you can do much more for the benefit of people and your country, and it will add to your own happiness. If you want money just for your own needs, you’ll never be satisfied or happy. In a word,you should have money spent for more people. Only then can money be the source of your happiness.Step 8 Homework4 students in a group, one acts Roderick, one Oliver, one servant and the fourth one acts Henry Adams, then listen to the tape, pay more attention to the difference between American English and British English in pronunciation, stress, tone.
【参考范文】Narrator:(Henry is smiling as he leaves the restaurant. As he is walking down the street, he sees a sign for a place that cuts hair. He decides to get it cut. )H=Henry;B=Barber;R=rude manH:Good afternoon, I'd like to get a cut, if I may. (The barber looks at Henry's hair and continues cutting another man's hair. )Er, I'd really like a haircut. As you can see it's much too long. B:(in a rude manner) Yes, I can see that. Indeed, I can. H:Fine, well I'll have a seat then. (He sits in one of the barber's chairs. The barber turns to look at Henry. )B:It's quite expensive here, you know!Are you sure you can afford it?H:Yes. I think so. (In comes the rude man. )R:Hey you there. I need a haircut quickly. Can you do me straightaway?B:All right, then, get in the chair and I'll see what I can do. R:Thank you. (sits down in one of the barber's chairs)H:Excuse me, but I was here first. Aren't you going to do my hair first?B:This man's in a hurry. H:Well so am I!I insist that you cut my hair first. B:OK, but I'll have to be quick. This gentleman is waiting. H:Thank you. (They both become quiet. After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B:Why, Mr . . . (looks shocked)H:Adams. Henry Adams. I'm sorry, I don't have any change. R:You're that Mr Adams! Well,I'm glad I waited or I might never have known it was you. B:Why, Mr Adams, please don't worry!(wearing a big smile) Nothing to worry about!Nothing at all!Please come back any time, even if you only need too little hairs cut!It will be my honour to serve you!
20XX.04-20XX.08 XXX软件有限公司 岗位:幼师工作描述:v 教师对本班幼儿的安全负责,严格执行安全制度,防止事故的发生。v 依据幼儿园教育工作计划要求,结合本班幼儿的年龄特点和个体差异,制定教育工作目标、计划,并组织实施,做好教育笔记。v 为幼儿创设良好的物质和精神环境,发挥环境教育作用。v 做好家长联系工作,了解幼儿家庭教育环境,商讨符合幼儿特点的教育措施。v 负责班级教学和日常管理工作;结合本班幼儿的年龄特点和个体差异,制定工作目标。
(3)说课时整体要流畅,不要作报告似的,有许多个123,环节间的过渡要自然,过渡语言可事先准备好。比如,教材分析后,要确定目标了,可以这样说基于对教材的理解和分析,我将本次活动的教学目标定位为为使幼儿感受,我为本次活动确定了两个目标,旨在对幼儿的认知、能力、情感等方面作积极的引导说好目标可接着说:下面我侧重谈谈对这个教学活动重难点的处理为顺利达成以上教学目标,我将做好以下准备等等。同时尽量避免师问、估计生答,师又问,估计生又答,这种流水帐式的说法。
2.广泛宣传、扩大影响。在活动中,我们在班级群发送安全提醒,发放“防溺水安全”、“交通安全”致家长一封信,为我们的教职工和家长提供了各种安全知识。3.将安全工作融入到班级的主题活动中。结合此次安全月活动,班主任在本周开展了安全教育活动,以达到教育幼儿的目的,包括有防溺水安全、交通安全等防意外伤害。四、加强宣传,强化监督,提高教职工和幼儿的安全意识1.班主任每日利用放学前对幼儿进行各种安全小常识的教育。2.通过让幼儿学习安全儿歌,进一步知道一些安全知识,组织幼儿观看有关安全的视频。3.园内开展消防逃生安全演练活动,让老师和孩子进行实际的操作和演练,加强孩子的自我防范意识。多年来,我园时刻牢记《纲要》要求,把保护幼儿的生命,促进幼儿的身心健康,当作持之以恒的工作来抓,我们每个教育工作者都必须时刻牢记。唯有如此,才能让每个孩子茁壮成长,让每个家庭快乐欢笑,让整个社会充满和谐。
一、 说教材1.教材分析《童年的发现》讲的是作者童年时的一个发现,反映了儿童求知若渴的特点和惊人的想象力。课文先概述了作者童年时的发现,然后具体叙述这项发现的经过,最后写这个发现在几年后老师讲课时得到证实。根据文章的特点,我选用了语文主题丛书《金色童年》中的《少年爱迪生》作为拓展。两篇文章主题相似,爱迪生小时候也遭受了和文中费奥多罗夫相似的遭遇:“世界上重大的发明与发现,有时还面临着受到驱逐和迫害的危险。”
我可以问大家几个问题吗?你每天早上起来用什么洗脸呢?你妈妈每天做饭都需要用什么呢?而你每当口渴的时候喝的都是什么呢?答案可能是同一个:“水。” 是啊,水看上去是那样的普通,普通得让人不可缺少而又随时可以忘记。人们只是在渴了的时候想到喝水,而对于水的本身关心得很少,甚至从未关心过。水,是生命之源,是任何物质都不可替代的,是世界上最重要,最珍贵的资源。没有水就没有生命,人类无法生存,更谈不上什么文明和发展。至今为止仍然认为水资源是取之不尽,用之不竭的想法是愚蠢和有害的。实际上,淡水资源是非常有限的,虽然水占地球表面的70%,但是只有%的是淡水,而其中99%都被冻结在荒芜人烟的南北极,只有不到1%可以利用。当前,由于世界人口的剧增、人类的过度索取和浪费,以及工业污染等原因,世界淡水资源越来越匮乏,人类正面临着严重的水危机。
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