Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”; “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
(4)Now we have heard a number of outstanding speeches ... 我们已经聆听了许多精彩的发言……(5)Because we wanted the nations of the world, working together, to deal with ... 因为我们希望全世界各国团结起来去应对……(6)And if we do not act ... 如果我们不采取行动……(7)Now, I share the concerns that have been expressed ... 我也同意对于……表达的担心(8)Let us show the world that by working together we can ... 让我们告诉全世界,通过一起努力我们可以……(9)It is now time for us to ... 是时候我们……(10)And I have always wished that ... 我一直希望……(11)Thank you for letting me share this day with me.感谢你们和我共度这一天。实践演练:假如你是高中生李华,你校将举办一次以“音乐”为主题的演讲比赛,请你按照主题,写下你的演讲稿。注意:词数100左右。First of all, thank you for listening to my speech. My topic is: love music like love yourself.Music is like the air we need to maintain our normal lives around us. You can't imagine how terrible a world without music would be. Movies and TV shows have no music, only dry conversations and scenes; mobile phones only vibrations; streets only noisy crowds; cafes, western restaurants only depressed meals. What a terrible world it is!As a student, I hope we all can enjoy the fun brought by music in our spare time. Instead of just listening to music, we can even make our own music. Let's enjoy the fun of music!Thanks again for your attention!
教材分析改革开放后我国的综合国力不断增强,人民对祖国统一的愿望越来越迫切。本节课以“一国两制”构想的提出,香港、澳门的回归和海峡两岸关系的发展为中心,说明实现祖国统一,完成中华民族复兴是历史发展的必然。第一目“‘一国两制’构想的提出”主要讲述了“一国两制”的含义及历史意义。第二目“香港、澳门的回归”着重讲述了香港回归、澳门回归的经过及历史意义,这是“一国两制”成功的实践。第三目“海峡两岸关系的发展”讲述了大陆注重发展与台湾的关系,促进海峡两岸的经济文化交流与合作,打破了几十年来海峡两岸的隔绝状态,促进了祖国统一的进程。此外,教材还通过“资料回放”“历史纵横”“学思之窗”等栏目,为学生学习提供了一些详细的史料。在教学中要分析图表资料,引导学生理解完成祖国统一大业,实现中华民族的复兴,是任何人也阻挡不了的历史潮流。
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
⑦identity theft 身份盗窃⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 张贴尴尬照片 【话题句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在网上保持安全, 避免在网上的不良经历? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是专家, 但作为一个博主, 我已经学了好几年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或读到一些让你觉得不舒服的东西, 立即离开这个网站。4. Don’t give out your address or phone number. 别告诉别人你的地址或电话号码。 5. Identity theft is a common and serious problem. 身份盗窃是一个常见而严重的问题。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上网并不是无礼的借口, 你也不想成为发挑衅帖子的人或网络恶霸的目标。 7. Trolls often use several false names so that they can stay on a site. 发挑衅帖子的人经常使用几个假名, 这样他们就可以留在一个网站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有礼貌, 你被攻击的可能性就越小。
Step1:自主探究。1.(教材P52)Born(bear) in the USA on 2 January 1970, Whitacre began studying music at the University of Nevada in 1988.2.(教材P52) Moved(move) by this music, he said, “It was like seeing color for the first time.”3.(教材P56)I was very afraid and I felt so alone and discouraged(discourage).4.(教材P58)Encouraged(encourage) by this first performance and the positive reaction of the audience, I have continued to play the piano and enjoy it more every day.Step2:语法要点精析。用法1:过去分词作表语1).过去分词可放在连系动词be, get, feel, remain, seem, look, become等之后作表语,表示主语所处的状态Tom was astonished to see a snake moving across the floor.汤姆很惊讶地看到一条蛇正爬过地板。Finally the baby felt tired of playing with those toys.终于婴儿厌倦了玩那些玩具。注意:1).过去分词作表语时与被动语态的区别过去分词作表语时,强调主语所处的状态;而动词的被动语态表示主语是动作的承受者,强调动作。The library is now closed.(状态)图书馆现在关闭了。The cup was broken by my little sister yesterday.(动作)昨天我妹妹把杯子打碎了。2)感觉类及物动词的现在分词与过去分词作表语的区别过去分词作表语多表示人自身的感受或事物自身的状态,常译作“感到……的”;现在分词多表示事物具有的特性,常译作“令人……的”。
This section focuses on "learning about experiencing music Online". This virtual choir is a new form of music performance. Members from all over the world don't need to love to come to a place. Instead, they use the new technology to model the various parts and wonderful virtual harmony group of music in the family. Students need to understand the main meaning of each paragraph. Finding topic sentences is an important way to understand the general idea of a paragraph. After the topic sentence, it is usually the detail sentence that supports and explains the topic sentence. Some paragraphs have obvious subject sentences, for example, the first sentence of the second paragraph is the subject sentence of the paragraph, and the following sentenceStudents need to pay attention to the topic sentences and key sentences, and then pay attention to how the sentences after the meaning explain, explain and support the topic sentences or key sentences before.1.Guide students to learn about experiencing music online2.Guide students to scan and circle the information in the text.3.Guide students to find the numbers and dates to fill in the timeline.4.Guide students to learn more about music by completing the sentences with the correct forms of the words and phrases. And then make a mind map about the outline of the passage.1. Guide students to pay attention to reading strategies, such as prediction, self-questioning and scanning.2. Help students sort out the main meaning of each paragraph and understand the narrative characteristics of "timeline” in illustrative style.3. Lead students to understand the changes that have been caused by the Internet.
二、教学目标:1、知识与能力(1)了解我国古代冶金、制瓷、丝织业发展的基本情况;(2)了解中国古代手工业享誉世界的史实,培养学生的民族自信心。2、过程与方法(1)通过大量的历史图片,指导学生欣赏一些精湛的手工业艺术品,提高学生探究古代手工业的兴趣;(2)运用历史材料引导学生归纳古代手工业产品的基本特征。3、情感态度与价值观:通过本课教学,使学生充分地感受到我国古代人民的聪明与才智,认识到古代许多手工业品具有较高的艺术价值,以及在世界上的领先地位和对世界文明的影响,增强民族自豪感。
8、板书装在套子里的人别里科夫的形象——有形的套子套己——无形的套子套人第二课时合作探究:目标挖掘主题及现实意义。问题设置,衔接上节课内容,层层深入。1、结合上节课别里科夫的形象分析:他的思想被什么套住,其悲剧原因在哪?(根据人物形象的分析与社会背景的了解,直击主题。)沙皇腐朽的专制统治套住了他的思想,沙皇的清规戒律使他不敢越雷池一步,所以他是受害者,但他的身份性格以及特定的社会环境,又让他成为沙皇统治的捍卫者。2、他恋爱的情节以及科瓦连科这两个人物的塑造的意义?(从人物以及主题入手,推翻沙皇的腐朽反动的统治,必须是每一个人都敢于打破套子,唤醒革新,更新观念,拒绝腐朽。)别里科夫渴望打破束缚,也想革新,而科瓦连科两个人物体现朝气活泼,以及勇于打破常规束缚的勇气,为革新升起了一片曙光。3、塑造别里科夫的手法,除了一般刻画人物方法外,还有什么方法?
【点津】 1.不定式的复合结构作目的状语 ,当不定式或不定式短语有自己的执行者时,要用不定式的复合结构?即在不定式或不定式短语之前加 for +名词或宾格代词?作状语。He opened the door for the children to come in. 他开门让孩子们进来。目的状语从句与不定式的转换 英语中的目的状语从句,还可以变为不定式或不定式短语作状语,从而使句子在结构上得以简化。可分为两种情况: 1?当目的状语从句中的主语与主句中的主语相同时,可以直接简化为不定式或不定式短语作状语。We'll start early in order that/so that we may arrive in time. →We'll start early in order to/so as to arrive in time. 2?当目的状语从句中的主语与主句中的主语不相同时,要用动词不定式的复合结构作状语。I came early in order that you might read my report before the meeting. →I came early in order for you to read my report before the meeting.
客观世界中的各种各样的运动变化现象均可表现为变量间的对应关系,这种关系常常可用函数模型来描述,并且通过研究函数模型就可以把我相应的运动变化规律.课程目标1、能够找出简单实际问题中的函数关系式,初步体会应用一次函数、二次函数、幂函数、分段函数模型解决实际问题; 2、感受运用函数概念建立模型的过程和方法,体会一次函数、二次函数、幂函数、分段函数模型在数学和其他学科中的重要性. 数学学科素养1.数学抽象:总结函数模型; 2.逻辑推理:找出简单实际问题中的函数关系式,根据题干信息写出分段函数; 3.数学运算:结合函数图象或其单调性来求最值. ; 4.数据分析:二次函数通过对称轴和定义域区间求最优问题; 5.数学建模:在具体问题情境中,运用数形结合思想,将自然语言用数学表达式表示出来。 重点:运用一次函数、二次函数、幂函数、分段函数模型的处理实际问题;难点:运用函数思想理解和处理现实生活和社会中的简单问题.
【总结讲解】地球为生命物质的存在提供了三个最优越的条件,这也是其它行星不具备的条件——(1)日地距离适中(1.496亿km),使地表平均气温为15℃,有利于生命过程的发生和发展;地球上的温度,还有利于水的液态存在。适合生物呼吸的大气: (2) 地球的体积、质量适中,吸引大量气体聚集在地球周围,又经过漫长的演化,形成了以氮、氧为主的适合生物呼吸的大气。(3)海洋的形成: 由于地球内部放射性元素衰变致热和原始地球重力收缩及地球内部的物质运动等形成了原始大洋,地球最初的单细胞生命就出现在大洋中。(备注:此部分可以模拟演示或讲解地球存在生命的温度、大气、水等条件;假设地球温度过高或过低对地球生命的影响;引导学生分析地球大气、温度与地球水的关系)【板书】1、日地距离适中2、地球的体积、质量适中3、液态水的存在【启发提问】 宇宙中是否只有地球上存在有生命物质?
解析:当a0时,直线ax-by=1在x轴上的截距1/a0,在y轴上的截距-1/a>0.只有B满足.故选B.答案:B 3.过点(1,0)且与直线x-2y-2=0平行的直线方程是( ) A.x-2y-1=0 B.x-2y+1=0C.2x+y=2=0 D.x+2y-1=0答案A 解析:设所求直线方程为x-2y+c=0,把点(1,0)代入可求得c=-1.所以所求直线方程为x-2y-1=0.故选A.4.已知两条直线y=ax-2和3x-(a+2)y+1=0互相平行,则a=________.答案:1或-3 解析:依题意得:a(a+2)=3×1,解得a=1或a=-3.5.若方程(m2-3m+2)x+(m-2)y-2m+5=0表示直线.(1)求实数m的范围;(2)若该直线的斜率k=1,求实数m的值.解析: (1)由m2-3m+2=0,m-2=0,解得m=2,若方程表示直线,则m2-3m+2与m-2不能同时为0,故m≠2.(2)由-?m2-3m+2?m-2=1,解得m=0.
情境导学前面我们已讨论了圆的标准方程为(x-a)2+(y-b)2=r2,现将其展开可得:x2+y2-2ax-2bx+a2+b2-r2=0.可见,任何一个圆的方程都可以变形x2+y2+Dx+Ey+F=0的形式.请大家思考一下,形如x2+y2+Dx+Ey+F=0的方程表示的曲线是不是圆?下面我们来探讨这一方面的问题.探究新知例如,对于方程x^2+y^2-2x-4y+6=0,对其进行配方,得〖(x-1)〗^2+(〖y-2)〗^2=-1,因为任意一点的坐标 (x,y) 都不满足这个方程,所以这个方程不表示任何图形,所以形如x2+y2+Dx+Ey+F=0的方程不一定能通过恒等变换为圆的标准方程,这表明形如x2+y2+Dx+Ey+F=0的方程不一定是圆的方程.一、圆的一般方程(1)当D2+E2-4F>0时,方程x2+y2+Dx+Ey+F=0表示以(-D/2,-E/2)为圆心,1/2 √(D^2+E^2 "-" 4F)为半径的圆,将方程x2+y2+Dx+Ey+F=0,配方可得〖(x+D/2)〗^2+(〖y+E/2)〗^2=(D^2+E^2-4F)/4(2)当D2+E2-4F=0时,方程x2+y2+Dx+Ey+F=0,表示一个点(-D/2,-E/2)(3)当D2+E2-4F0);
本节课是新版教材人教A版普通高中课程标准实验教科书数学必修1第四章第4.5.1节《函数零点与方程的解》,由于学生已经学过一元二次方程与二次函数的关系,本节课的内容就是在此基础上的推广。从而建立一般的函数的零点概念,进一步理解零点判定定理及其应用。培养和发展学生数学直观、数学抽象、逻辑推理和数学建模的核心素养。1、了解函数(结合二次函数)零点的概念;2、理 解函数零点与方程的根以及函数图象与x轴交点的关系,掌握零点存在性定理的运用;3、在认识函数零点的过程中,使学生学会认识事物的特殊性与一般性之间的关系,培养数学数形结合及函数思想; a.数学抽象:函数零点的概念;b.逻辑推理:零点判定定理;c.数学运算:运用零点判定定理确定零点范围;d.直观想象:运用图形判定零点;e.数学建模:运用函数的观点方程的根;
本章通过学习用二分法求方程近似解的的方法,使学生体会函数与方程之间的关系,通过一些函数模型的实例,让学生感受建立函数模型的过程和方法,体会函数在数学和其他学科中的广泛应用,进一步认识到函数是描述客观世界变化规律的基本数学模型,能初步运用函数思想解决一些生活中的简单问题。1.了解函数的零点、方程的根与图象交点三者之间的联系.2.会借助零点存在性定理判断函数的零点所在的大致区间.3.能借助函数单调性及图象判断零点个数.数学学科素养1.数学抽象:函数零点的概念;2.逻辑推理:借助图像判断零点个数;3.数学运算:求函数零点或零点所在区间;4.数学建模:通过由抽象到具体,由具体到一般的思想总结函数零点概念.重点:零点的概念,及零点与方程根的联系;难点:零点的概念的形成.
一、说教材:(一)教材的地位和作用《念奴娇﹒赤壁怀古》是部编版高中语文教材必修上册第9课的课文。它与辛弃疾的《永遇乐﹒京口北固亭怀古》,李清照的《声声慢》共同入选该册教材第三单元阅读古诗词,感悟人生这一学习专题。本词是苏轼的代表作,也是豪放词的名篇,在古诗词教学中占有重要的地位。优美的诗词是中华传统文化的瑰宝,学习这些诗词的目的在于培养学生鉴赏古代诗词作品的能力,在分析、鉴赏中感悟前人丰饶的情思,博大的智慧,从而提高学生的人文素养,提高文化品味。这首词写于元丰五年,是苏轼被贬黄州游赤鼻矶所作。本词感情激荡,意境雄浑壮阔。全词融写景、咏史、抒情为一体。通过学习,学生可以获得一些鉴赏诗词的基本要领,领略壮阔意境,感受豪放词风;同时学习苏轼在逆境中依然乐观旷达的人生观。
运用比较法,让学生讨论比较字词改换后与原诗在表达效果上有何异同,然后教师和同学们共同总结出原诗中的画线字词主要运用了比喻和拟人等修辞手法,显得既生动又含蓄,富有意境美,而改后的字词显得直白而又重复。通过文本研读部分的学习,学生对诗歌内容有了较深入的理解,为了使学生拓宽知识面,加强思想价值观的教育引导,在拓展练习部分我设置了一个探究性的问题,让学生谈谈如何看待陶渊明归隐的问题,我采用合作探究法,让学生分组互动讨论、自由发言。教师针对学生的发言,及时地加以点拨:陶渊明不与统治者合作,令人敬佩;歌唱田园风光,令人赞叹;归隐田园有独善其身,消极避世因素,这一点自然不应当苛求古人。
教师活动:(1)组织学生回答相关结论,小组之间互相补充评价完善。教师进一步概括总结。(2)对学生的结论予以肯定并表扬优秀的小组,对不理想的小组予以鼓励。(3)多媒体投放板书二:超重现象:物体对支持物的压力(或对悬挂物的拉力)大于物体所受到的重力的情况称为超重现象。实质:加速度方向向上。失重现象:物体对支持物的压力(或对悬挂物的拉力)小于物体所受到的重力的情况称为失重现象。实质:加速度方向向下。(4)运用多媒体展示电梯中的现象,引导学生在感性认识的基础上进一步领会基本概念。4.实例应用,结论拓展:教师活动:展示太空舱中宇航员的真实生活,引导学生应用本节所学知识予以解答。学生活动:小组讨论后形成共识。教师活动:(1)引导学生分小组回答相关问题,小组间互相完善补充,教师加以规范。(2)指定学生完成导学案中“思考与讨论二”的两个问题。
本节课是在学习了三角函数图象和性质的前提下来学习三角函数模型的简单应用,进一步突出函数来源于生活应用于生活的思想,让学生体验一些具有周期性变化规律的实际问题的数学“建模”思想,从而培养学生的创新精神和实践能力.课程目标1.了解三角函数是描述周期变化现象的重要函数模型,并会用三角函数模型解决一些简单的实际问题.2.实际问题抽象为三角函数模型. 数学学科素养1.逻辑抽象:实际问题抽象为三角函数模型问题;2.数据分析:分析、整理、利用信息,从实际问题中抽取基本的数学关系来建立数学模型; 3.数学运算:实际问题求解; 4.数学建模:体验一些具有周期性变化规律的实际问题的数学建模思想,提高学生的建模、分析问题、数形结合、抽象概括等能力.