在讲述细胞分化的意义时,也可以用实例来解决,工厂的生产车间里不同的工人干着不同的工作,一件产品的产出需要这些工人才能创造出来,一个生物体就像一个车间一样,不同的细胞各司其职,相互合作。工人的分工是主管调解出来的,而不同细胞的出现就是细胞分化的结果,所以说,细胞的分化是生物体发育的基础。在讲到细胞全能性的时候,要多给学生举些关于细胞全能性的例子,如植物组织培养、克隆技术等等,让学生从实际的例子中真正的悟出细胞全能性的含义。此外,还要重视教材中的疑问,适当对题目进行引申,使它的作用更加突出,有利于学生对知识的串联、积累、加工,从而达到举一反三的效果。怎样来解释细胞的全能性呢?这主要以讲授法来解释了,细胞全能性的体现需要在组织或器官离体后才能体现出来,每个细胞都包含着生物体的全套遗传基因,通过基因选择性的表达,使离体的组织或器官通过分裂和分化逐渐发育成完整的植株。
教材地位本课具有承上启下的作用,前承文艺复兴,后启资产阶级革命时代的到来,启蒙运动为资本主义社会构建了一套政治蓝图,具有前瞻性,是近代第二次思想解放运动。因此,本节内容在整个教材中有着很重要的地位。教学目标1、知识目标:(1)帮助学生了解启蒙运动的性质、内容和主要启蒙 思想家及其主张。(2)理解启蒙运动兴起的背景、影响。2、能力目标:(1)在讨论和探究过程中训练学生的科学思维方法和自主学习的能力和掌握解题的方法。(2)通过指导学生阅读启蒙思想家的言论资料,培养学生对历史资料的理解和归纳能力。3、情感价值目标:(1)培养人文意识,强化法治观念。(2)培养学生的团结协作精神和竞争意识。教学重点、难点(1)教学重点:启蒙思想家的主张及启蒙运动的影响。
设问:DNA复制后两个子代DNA分子与亲代DNA分子是否完全相同?为什么?通过设问,让学生进一步理解和巩固DNA复制的全过程。接下来让学生总结出DNA复制的四大基本条件:① 模板:开始解旋的DNA分子的两条单链;② 原料:是游离在核液中的脱氧核苷酸;③ 能量:是通过水解ATP提供;④ 酶:酶是指一个酶系统,不仅仅是指一种解旋酶。最后通过以上分析,总结出DNA复制的意义以及在生活中的应用:意义:DNA通过复制,使遗传信息从亲代传给子代,从而保证了物种的相对稳定性,保持了遗传信息的连续性,使物种得以延续。应用:目前DNA分子广泛应用于刑事案件侦破等方面:如:DNA分子是亲子鉴定的主要证据之一。把案犯在现场留下的毛发、血等进行分析作为破案的证据,与DNA有关。五、设计课堂练习:设计一题典型课堂练习:即有关半保留复制及计算的习题:
四、说教学程序(一).温故知新、导入新课复习提问:基因突变导致生物变异的原因是什么?回答:基因突变是基因结构发生改变,从而使遗传信息改变,使蛋白质结构改变、生物性状改变,即生物发生了变异。那么,基因是什么?它和染色体又有何关系?回答:基因是有遗传效应的DNA片断,染色体是DNA的载体,基因在染色体上呈线形排列。引出新知:对于一个生物体来说,正常情况下,其染色体的结构和数量都是稳定的。但在自然条件或人为因素的影响下,染色体的结构和数量均会发生改变,从而导致生物性状的改变,这就属于染色体变异。(二).把握重点、突破难点重点的把握:1、染色体结构的变异播放影片:猫叫综合征幼儿。让学生观察: 患儿哭声轻、音调高,很像猫叫。教师补充: 患儿的征状---两眼较低、耳位低下,存在着严重的智力障碍。阐述病因---染色体片段缺失
各小组派代表汇报。4、教师提出问题组织学生讨论:⑴要想了解更多的绿色食品,了解绿色食品的销售情况,我们应该怎么做?⑵要想了解广大消费者对绿色食品的态度,食用绿色食品的意义,是否懂得辨认绿色食品,以及什么样的人群对此知识最缺乏等,我们应该怎么做?组织学生汇报交流。5、做个“绿色食品”广告设计师。为你喜欢的绿色食品设计广告语,每组推荐一个。6、让学生了解绿色食品认证程序。7、绿色食品打“假”队员在行动。8、向学生介绍生态绿色食品基地。三、活动总结:通过研究、探讨,了解学生对绿色食品的态度。提问:民以食为天,吃,是一个大问题,如果你的爸爸妈妈让你到超市买牛奶、方便面等,你会选择什么样的食品?为什么?希望通过今天的学习,同学们能够做到绿色消费,也希望你们向自己的家人、向周围的了解学生对“无公害食品”、“有机食品”与“绿色食品”的认识。
Textbook: Senior English for China (Book 4), by Liu Daoyi Time Allotment: 1 period (40 minutes)Date: March 20, 2014Teaching aids: blackboard, Multi-media, Power Point, chalk I. Text Analysis (教材分析)This unit is about body language, and the text selected in the reading part demonstrates the difference and similarity of body language in many parts of the world. Through learning this passage, students are required to raise their awareness of using body language in different parts of the world. As body language is closely related to our daily life, it is easy to arouse students’ interest in learning this text. Reading skills and speaking training are designed around the text.II. Teaching Objectives (教学目标)By the end of the lesson, students will be able to:1. Language Skill Objective(语言技能目标): develop reading ability (skimming and scanning)as well as speaking ability.2. Cultural Knowledge Objective(文化知识目标): know about the cultural differences of using body language.3. Affective Objective(情感目标): increase students’ awareness of using body language correctly in different cultures. III.Teaching Focuses and Difficulties(教学重点和难点)1. Teaching Focuses(教学重点): the difference and similarity of body language in many parts of the world.2. Teaching Difficulties(教学难点): develop students’ reading abilities of skimming and scanning and ask the students to show their opinions with fluent English.
Good morning, distinguished judges:It’s my honor to talk about my teaching ideas with you. Today my topic is Women of Achievement. My presentation consists of six parts: the analysis of teaching material and student, teaching aims, key and difficult points, teaching and studying method, teaching procedures and blackboard design.First, let’s focus on the analysis of teaching material. This lesson is from New Senior English for China Student’s Book 4 Unit 1, the reading part. The main topic of the passage is the introduction of a student of Africanwildlife. After this lesson, the students will learn more information about her studying chimps in Africa, and their reading and speaking abilities can be developed as well.The next part is the analysis of students. My students are in senior high students. They have learnt English for many years, they’ve known many words and sentences, but their speaking and reading abilities are still not very good. So I will practice their speaking and reading abilities through different exercises.According to the New Standard Curriculum and the present situation, I set the teaching aims as follows: firstly, knowledge aims. Students can grasp some new words, such as worthwhile, move off. Moreover, students can understand the content of the passage and get familiar with the topic of studying chimps in wildlife. Secondly, ability aims. Students can use reading strategies such as skimming and scanning in reading process. Thirdly, emotional aims. Students can have the awareness of protecting animals and care about animals.Based on the above analysis, the key point of this lesson is to get the main idea and the detailed information from the passage; the difficult point is to talk about the wildlife protection and use reading strategies.
In this class, I have 3 teaching aims, that is, knowledge aims, ability aims and emotion aims.1) Knowledge-Teach students new words and expressions, such as temporary, bleed,sprain choke, first aid, fall ill and so on.-Enable students to have a better understanding for some basic knowledge of first aid.2) Ability-Train students’ speaking, reading and writing abilities by different teaching activities, such as skimming, comprehending, team work, role play, retelling and writing.-Develop students’ reading strategy on how to move general idea to specific information.3) Emotion-Promote students’ awareness of giving first aid.- Cultivate students’ creativities.Then let’s come to my teaching methods and activities.III. Teaching methods and activities:To achieve different teaching aims, various kinds of teaching methods and activities will be adopted throughout this period, such as TBL (task-based learning), skimming, team work, brainstorm and others, which can offer students opportunities to fulfill tasks in which they can use language to achieve a specific outcome.IV. Teaching aids:Computer and blackboardV. Teaching important points:1) Make students have a clear mind for the structure of the text.2) Help students understand the theme of the text.VI. Teaching difficulties:1) So many new words may affect students’ understanding.2) How to get students to know about the functions of the skin and thecauses, characteristics and treatments for different degree burns,and the knowledge about giving first aid. VII. Blackboard design:
通过写文章梗概,培养学生综合运用语言的能力,学习用恰当的英语描述科学家的故事。这是本课的教学难点。教师可以使用完形填空的方式来帮助学生整理语篇,从而来降低难度。本课的教学重点的突破方法是:在阅读前,让学生初步了解得出科学观点所需要的基本程序,从而轻松而自然地导入文章的阅读;在阅读过程中,由易到难设计快速阅读和精读的问题,层层推进各种阅读活动,让学生对阅读内容从整体感知到细节理解,最后深层读懂整篇文章,同时加强阅读策略的指导,让每个学生都主动参与课堂教学活动,最终达到提高阅读能力的目的。Step 4 Post-readingGroup Activities四人小组共同合作,在老师的适当指导下,就以下2个问题展开讨论,让学生就所知、所学、所感和所想融入话题,然后抽若干同学代表作小组发言。1. What do you think about John Snow, and what should we learn from him?2. Cholera was 19th century disease, which two diseases are similar to cholera today? Why?
Good afternoon, everyone. It’s my great pleasure to be here sharing my lesson with you. The content of my lesson is Senior English for China Book5 Unit 3 Life in the Future. I’ll be ready to begin this lesson from six parts: Analysis of the teaching material, Analysis of the students, Teaching aims and important and difficult points, Teaching methods and aids, Teaching procedures, and Blackboard design. First, let me talk about the teaching material.Part 1 Analysis of the Teaching Material:This unit is about what human beings’ life will be like in about one thousand years. By studying of this unit, we’ll Enable the students to know the changes in humans’ life and some new inventions bringing about the change and develop the interest in science. This lesson plays an important part in the English teaching in this unit. This is an important lesson in Book Five. From this lesson, it starts asking the Ss to grasp contents of each passage. Therefore, this lesson is in the important position of the teaching material. If the Ss can learn it well, it will be helpful to make the Ss learn the rest of this unit.Part 2 Analysis of the SsAs Senior2 Ss, they are at different levels of English fluency, some of them have lost interest in English. So during the lesson, I arrange a variety of activities to let all of them join in to attract their interest and let them be confident and taste the joy of success.
今天我们来介绍一下必修五第四单元的授课方式。这个单元的题目是Making the news。应该是学生比较感兴趣的话题,学生往往对新闻工作充满好奇,所以我们可以利用这个机会多设计一些师生互动和学生互动,来激发起学习的积极性,提高学习效率。同时我们可以利用这个单元不仅帮助学生掌握语言知识,培养语言能力,同时让其了解新闻工作的重要性,培养起社会智能感。这个单元分为六个课时,它的教学目标是这样的:语言目标是掌握词汇表中的常用单词和短语,掌握倒装句的一些基本用法。 技能目标是能初步掌握约会的基本句型并在真实的场景下正确运用。新闻报道类文章的写作技能。采访的基本规范和沟通技能。情感目标是对新闻报道的客观性和真实性有更好的理解。对新闻记者的职业有更深入的了解,并能体会其工作的重要性。下面我们来介绍一下第一课时的授课方式,第一课的教学目标是这样的第一课时的教学目标语言目标:单词:Occupation, journalist, editor, photographer, curious, personality, enthusiasm
Teaching Aims:Knowledge 1. Get the students to learn the useful new words and expressions in this section. Aims:2. Let the students learn about how the UK was formed and the four groups of invaders.1. Develop students’ reading ability and let them learn different Ability reading skills. Aims:2. Enable students to learn to talk about the United Kingdom and the Union Jack Emotional 1. Let students know more about the UK2. Develop students’ sense of cooperative learning Aims:Teaching Important Points:1. Let the students learn about the countries of the United Kingdom and the Union Jack2. Get the students to read the passage and know about how the UK was formed and the four groups of invaders.3. Have the students learn different reading skills.Teaching Difficult Ponts:1. Develop students’ reading ability.2. Enable students to talk about the United Kingdom and the Union Jack.3. Let students learn how the UK was formed geographically and historically.Teaching Methods:Showing pictures, asking, exercising, listening, reading etc.Teaching Aids:A computer,a projector and a blackboard.Teaching Procedures: 1) Show a map of the world, ask students the following questions:Where is the UK?What’s the full name of the UK?2) Ask the students work in pairs to do the quiz on Page 9.Do you want to test how many things you know about the United Kingdom? Let’s have a small test.Using the map on P9, students answer the following questions:?How many countries does the UK consist of? What are they??England is divided into three main areas. Do you know what they are? 1) Scanning (10Minutes )Let the students hold the questions asked in pre-reading and read the passagequickly and then let them do the following exercise.Join lines to the right answer.
三、文本中的句子解决完毕,大家对文本内容的理解更加深入了。请速度文本,思考:《论语》具体涉及了哪些方面的内容,体现了孔子什么观点?明确:主要有治学、从政、修身养性和交友治道等方面,体现了孔子“克己复礼”的思想。四、 教师引导学生讨论: 如何评价孔子的言行和观点?从古至今人们对孔子有哪些评价?明确:1、春秋战国时代, 孔子门人及其后学者均推尊孔子。门人中以子贡为代表,他对孔子赞美备至,奉如天人,把孔子比拟为高天、日月、木铎,凡人是永远不可企及的,认为孔子是天生的圣人,“仰之弥高,钻之弥坚”。亚圣孟子认为孔子所行的“圣人之道”是遍及自然界和社会的至高准则。然而当时民间一般看法认为孔子是博学成名的大学者。
明确:(1)结绳记事说。原始记事的一种方法。人类在没有发明文字或文字使用尚不普遍时,常用在绳索或类似物件上打结的方法记录数字,表达某种意思,用以传达信息,处理事件。 (2)书画说。(3)仓颉造字说。中国自古就有仓颉造字之说。文字的发明是人类发展史上一件石破天惊的大事,它将人们的思维、语言、经验以及复杂的社会现象记录下来,使文化得以传播交流、世代传承。2、汉字的形体:中华民族五千年的历史中,汉字的演变,从甲骨文--金文--大篆--小篆--隶书--草书--楷书--行书,字形由象形到点横竖撇捺的方块字,经历了漫长的岁月。其中凝聚着民族的智慧,也体现出汉字逐步完善的过程,凸显其方方正正、四平八稳的特点。汉字又是一种文化的体现,那些经过艺术处理的汉字或跳起了拉丁舞、有的如同酒醉的成龙打起了醉拳,更是让我们感到的是在欣赏汉字在纸张上跳舞,所以:书法是“纸上的舞蹈”。请大家看到书上的相关内容,注意每一种形体的汉字的载体是什么,其功能又有什么不一样。
探究、讨论、交流:1、包弟讨人喜欢,作者却不得不将它送走,为什么?2、送走包弟后,作者为什么先是感觉轻松,随后觉得沉重?3、“您的小狗怎样?”这句话反复出现,有什么用意?4、“整整十三年零五个月过去了”“整整”一词有什么作用?5、“满园的创伤使我的心仿佛又给放在油锅里熬煎”这句话如何理解?6、“我怀念包弟,我想向它表示歉意。”如何理解?学生各抒己见后教师结合材料发表看法明确总结特别是最后一个问题得出作者这发之心底的语言,不仅仅是歉意,更是发自灵魂深处的忏悔!是对生命的尊重,是一个有良知的作家对反省历史的呼号。第三环节“认识你自己”——忏悔意识与我引导学生正视和反省成长过程中曾犯下过错。并布置课后作业:要求学生课后在本周随笔中谈反省忏悔后的感受。
【教学目标】Ⅰ、学习理解诗歌语言的暗示性特质。Ⅱ、根据诗歌语言的特质,进行迁移,领略诗歌的精妙之处,给同学如何鉴赏诗歌提供实感。㈠、导入:各位同学,有个成语叫"一字千金"。对我而言,第一次领略到一个字的分量,是在小学三年级的时候,一次作文评析课上。当时我对自己的文章充满了期待,希望能得到老师的赞赏。记得老师进来后的第一句话是"有一篇文章,我就冲它用了一个字,我给它打95分。打这样的高分,对我来说,是极为难得的。"同学都充满了好奇,老师接着说"这个字就是一个'悟'字。我们的同学都说我学到了,我明白了,我懂得了一个道理,而这位同学却用了一个'悟'字,难能可贵。"这篇文章不是我的,在羡慕的同时,一个字在文章中的分量就深深的刻在了我的心上。文学作品中,一个字精妙与否,足以决定作品是流光溢彩,还是黯然失色。尤其是我们的古典诗词,用简短的几个字,造就的却是丰富的情感与博大的意境。读后满口余香,却是妙处难与君说。这跟诗歌的语言是密不可分的。今天,我们就通过《说"木叶"》一文,对中国古典诗词语言特质作一番探幽。
二、学情分析:学生目前对形变和弹力有一定的感性认识但是不够深入;知道支持力、压力都是弹力,但是不能够概括产生的原因。理性思维还没有达到一定的层次,要想理解弹力这一抽象概念还有一定困难。因此我采取引导、启发的教学方式。
四、教学过程1.导入新课(2分钟)出示中非合作论坛暨第3届部长级会议图片。用时事引起学生注意,设问,“55年前,亚洲与非洲有哪一次跨越印度洋的握手”,提示答案“万隆亚非会议”,给出答案导入新课2.外交环境:学生阅读,教师分析。(3分钟)3.外交方针之一:独立自主的和平外交方针(5分钟) 出示材料:《共同纲领》引文。学生、阅读、提炼除新中国奉行独立自主的外交政策。进而由学生分析另起炉灶、打扫干净屋子再请客和一边倒。培养学生分析材料、利用材料的能力过度:新中国作出一边倒大的积极主动态势,社会主义阵营的兄弟们也立刻作出了积极回应。1949年10月2日,中苏建立了外交关系。4.外交建树之一:同苏联等17个国家建立外交关系(3分钟)出示毛泽东访问苏联等图片和第一批建交的17个国家名字
(一)地位《生活中的圆周运动》这节课是新课标人教版《物理》必修第二册第5章《曲线运动》一章中的第7节,也是该章最后一节。本节课是在学生学习了圆周运动、向心加速度、向心力以后的一节应用课,通过研究圆周运动规律在生活中的具体应用,使学生深入理解圆周运动规律,并且结合日常生活中的某些生活体验,加深物理知识在头脑中的印象。(二)教材处理教材中的“火车转弯”与“汽车过拱桥”根据学生接受的难易程度,顺序作了对调,并把最后一部分“离心运动”放到下一节课处理。(三)教学目标1.知识与技能目标(1)进一步加深对向心力的认识,会在实际问题中分析向心力的来源。(2)培养学生独立观察、分析问题、解决问题的能力,提高学生概括总结知识的能力。(3)了解航天器中的失重现象。2.过程与方法目标(1)学会分析圆周运动方法,会分析拱形桥、弯道等实际的例子,培养理论联系实际的能力。
师:改革开放后,乔家依然是生意兴隆,财源广进。下面我们来看一下他们乘坐另一种交通工具。(画外音响起,男中音用缓慢、低沉的语调朗诵;幻灯片展示)(七)乔致庸1905年来到上海,腰缠万贯的他坐上了行驶在柏油公路上的“四轮子”。可惜的是,此后的四十年,中国也没有多少柏油路和“四轮子”.直到50年后,四轮子和“柏油路”才多了起来。“四轮子”是什么?为什么“此后的四十年,中国也没有多少柏油路和四轮子”?为什么“直到50年后,四轮子和“柏油路”才多了起来”?生:略师:20世纪初,汽车开始出现在上海。因为旧中国政治腐败、民生凋敝。新中国成立后有了自己的汽车制造厂,比如说一汽、二汽。解放后,我们的汽车产业蒸蒸日上。(展示材料)屏幕显示:1956年,长春第一汽车制造厂生产出第一批 “解放牌”载重汽车,标志着中国汽车工业的诞生。2009年我国汽车工业取得了全球瞩目的成绩,首次超过美国,成为全球产销量第一的国家。