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人教版新课标高中物理必修1匀变速直线运动的速度与时间的关系教案2篇
一、设计思想通过本节教学，不但要使学生认识掌握匀变速直线运动的规律，而且要通过对这问题的研究，使学生了解和体会物理学研究问题的一个方法，图象、公式、以及处理实验数据的方法等。这一点可能对学生更为重要，要通过学习过程使学生有所体会。本节在内容的安排顺序上，既注意了科学系统，又注意学生的认识规律。讲解问题从实际出发，尽量用上一节的实验测量数据。运用图象这种数学工具，相对强调了图象的作用和要求。这是与以前教材不同的。在现代生产、生活中，图象的运用随处可见，无论学生将来从事何种工作，掌握最基本的应用图象的知识，都是必须的。学生在初学时往往将数学和物理分割开来，不习惯或不会将已学过的数学工具用于物理当中。在教学中应多在这方面引导学生。本节就是一个较好的机会，将图象及其物理意义联系起来。
人教版新课标高中物理必修1匀变速直线运动的速度与时间的关系教案2篇
一、设计思想通过本节教学，不但要使学生认识掌握匀变速直线运动的规律，而且要通过对这问题的研究，使学生了解和体会物理学研究问题的一个方法，图象、公式、以及处理实验数据的方法等。这一点可能对学生更为重要，要通过学习过程使学生有所体会。本节在内容的安排顺序上，既注意了科学系统，又注意学生的认识规律。讲解问题从实际出发，尽量用上一节的实验测量数据。运用图象这种数学工具，相对强调了图象的作用和要求。这是与以前教材不同的。在现代生产、生活中，图象的运用随处可见，无论学生将来从事何种工作，掌握最基本的应用图象的知识，都是必须的。学生在初学时往往将数学和物理分割开来，不习惯或不会将已学过的数学工具用于物理当中。在教学中应多在这方面引导学生。本节就是一个较好的机会，将图象及其物理意义联系起来。
人教版新课标高中物理必修1匀变速直线运动的位移与时间的关系教案2篇
一、教学目标1．知识与技能：(1)知道匀速直线运动的位移x＝υt对应着 图象中的矩形面积．(2)掌握匀变速直线运动的位移与时间关系的公式 ,及其简单应用．(3)掌握匀变速直线运动的位移与速度关系的公式 ,及其简单应用．2．过程与方法：(1)让学生初步了解探究学习的方法．(2)培养学生运用数学知识-----函数图象的能力．(3)培养学生运用已知结论正确类比推理的能力．3．情感态度与价值观：(1)培养学生认真严谨的科学分析问题的品质．(2)从知识是相互关联、相互补充的思想中，培养学生建立事物是相互联系的唯物主义观点．(3)培养学生应用物理知识解决实际问题的能力．二、教学重点、难点1．教学重点及其教学策略：重点：(1)匀变速直线运动的位移与时间关系的公式 及其应用．(2)匀变速直线运动的位移与速度关系的公式 及其应用．教学策略：通过思考讨论和实例分析来加深理解．
人教版高中语文必修3《老人与海》说课稿2篇
3、重要语句的理解“可是一个人并不是生来要给打败的，你尽可把它消灭掉，可就是打不败他。”解析：这是老人第一次回合之后的内心独白，也是此小说的核心精神，充分体现了老人桑地亚哥的生命理念。整句话可以分为两部分来理解，前句告诉我们，人生活在自然与社会当中，必不可少要面临一些坎坷、磨难，这些磨难、坎坷完全可以造成躯体的消灭、消亡，这是人生命的脆弱性。后句，面对挫折，只要保持一种乐观的精神，拥有一颗坚强的心灵，那么，人类执着奋斗的精神将永不磨灭。4、象征主义题目是《老人与海》，而表明上，小说是写一位老人及其在海上的经历，但实际上，老人的形象极具概括性，他已经超越了一个人的存在，而成为了人生的一种象征。老人桑地亚哥就是“硬汉子”的代表，大海则是生命旅途的象征，鲨鱼则是我们行走中的“强物”，厄运的象征。人的一生不可能一帆风顺，不经历风雨，怎能见彩虹，走在人生路途中，不可避免我们都要遇到挫折，被厄运所阻挠，只有经历与“鲨鱼”的较量，才能成为强者，唱出最美的歌。
人教版高中生物必修1细胞的衰老与凋亡说课稿
4、最后从生物的寿命引入，探讨细胞的死亡。强调细胞死亡有两种形式。(1).细胞坏死，它是由某些外界因素造成细胞急速死亡，是一种被动性死亡；(2).细胞凋亡，这是一种由特定基因控制的主动性死亡。细胞坏死与细胞凋亡在形态学和生物化学上有着明显的区别。细胞凋亡有广泛的生物学意义，比如胚胎发育期手的发育如果没有细胞的调亡就不会有纤细的手指；如果没有正常的细胞调亡，蝌蚪的尾部就不会消失，它将永远不能变成青蛙……。正常的细胞调亡还肩负着维持各种组织器官固有体积和形态的功能；还会使机体内异常的细胞得到及时清除，去处潜在的隐患；例如癌症就是异常的细胞没有及时死亡的结果……。因此细胞的正常死亡是生物体的一种非常重要的调节机制，是机体平衡细胞增殖，调节机体细胞树木恒定的方式，是必不可少的生命过程。（15分钟）5、课堂小结，可以把课堂传授的知识尽快地转化为学生的素质；简单扼要的课堂小结，可使学生更深刻地理解政治理论在实际生活中的应用，并且逐渐地培养学生具有良好的个性。
必修一牛顿第一定律教案
(二)?过程与方法? 4.?观察生活中的惯性现象，了解力和运动的关系? 5.?通过实验加深对牛顿第一定律的理解? 6.?理解理想实验是科学研究的重要方法? (三)?情感态度与价值观? 7.?通过伽利略和亚里士多德对力和运动关系的不同认识，了解人类认识事物本质的曲折性? 8.?感悟科学是人类进步的不竭动力
新人教版高中英语必修3Unit 4 Space Exploration-Discovering Useful Structures导学案
【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.
人教版高中语文必修2《采薇》说课稿
三、疏通课文，体会情感学生朗读一至三节，找出通假字，如“莫”；语助词如“止”“曰”；古今异义词如“启”“居”。以及个别短语如“靡室靡家”“载饥载渴”的结构，结合上《卫风·氓》中出现的相同或类似的结构来理解。检查学生的自学情况，抽查翻译，纠正错误。这三节都以采薇起笔，让学生思考课文呢写了薇菜生长的哪几种形态，有什么作用？学生思考。这个问题不难，但学生回答可能不完整，只点到用于表达士卒思归之情的强烈。老师要补充，用薇菜的生长来反映归期的推移和不定期，思念之情更加沉重。同时在艺术手法上，同《卫风·氓》用“桑叶”来起兴一样，这里也是比兴手法，引出下文。另外，战士们靠野菜来充饥也反映了战士们生活艰苦，兴中有赋。
人教版高中语文必修3《锦瑟》说课稿
三、教学目标根据《锦瑟》诗的地位作用以及学生的实际情况，还有在古诗词教学方面课程标准的相关要求，现确定以下“三维教学目标”：（一）知识与技能目标：感受体悟古典诗歌的意境美，发挥合理的主观能动性进行创新性的阅读鉴赏，正确认识意象在诗歌意境中的重要作用。并在上述的基础上提高鉴赏能力和审美情操。（二）过程与方法目标：《锦瑟》诗的讲解采用“引导与自我生成”的方法，从老师的引导开始，以学生的研讨交流再加之教师的总结结束。利用教师引导和师生互动刺激学生的领悟力，提高学生的认知水平与能力。（三）情感态度价值观目标：培养学生在尊重传统文化的基础上热爱祖国自己文化的态度，让学生正确认识古典诗词的精神美。最后在自我感悟中陶冶情操，明心启智。
人教版高中英语必修1Earth quake说课稿
(4)Finally, I will ask the SS what this sentence mean：It is always calm before a storm.Purpose: attract the SS attention and bring them into discussionStep 2: Pre-reading 读前Here, I will do the second question in pre-reading first. I will use the method of brainstorming to ask the SS what will happen before an earthquake; and list the phenomenon on the table. 2． Then I will show the SS the picture of abnormal phenomenon, at the same time, encourage the SS to describe.3、finally, I will summarize these phenomenon4、Do the first question in the pre-reading , Imaging your home begins to shake and you must leave it right away. You have time to take only one thing. What will you take? Why?Purpose: help the SS to get further understanding of the topic and stimulate their interests.Step3: While-reading 阅读(1). Skimming Read the text quickly and catch the meaning of the first and second sentence of each paragraph. Predict the meaning of new words(2).scanning(找读)A. Read the text again. Do the following question.1. When and where were the strange things happening?2. What are they?3. Why did the text say the world seemed to be at an end?4. How was the city destroyed after the quake?5. When did the second quake hit the city? What was the result of that?6. Who came to help Tangshan first? And how?B. Work in pairs to discuss the question.
倾斜角与斜率教学设计人教A版高中数学选择性必修第一册
(2)l的倾斜角为90°,即l平行于y轴,所以m+1=2m,得m=1.延伸探究1 本例条件不变,试求直线l的倾斜角为锐角时实数m的取值范围.解:由题意知(m"-" 1"-" 1)/(m+1"-" 2m)>0,解得1<m<2.延伸探究2 若将本例中的“N(2m,1)”改为“N(3m,2m)”,其他条件不变,结果如何?解:(1)由题意知(m"-" 1"-" 2m)/(m+1"-" 3m)=1,解得m=2.(2)由题意知m+1=3m,解得m=1/2.直线斜率的计算方法(1)判断两点的横坐标是否相等,若相等,则直线的斜率不存在.(2)若两点的横坐标不相等,则可以用斜率公式k=(y_2 "-" y_1)/(x_2 "-" x_1 )(其中x1≠x2)进行计算.金题典例 光线从点A(2,1)射到y轴上的点Q,经y轴反射后过点B(4,3),试求点Q的坐标及入射光线的斜率.解:(方法1)设Q(0,y),则由题意得kQA=-kQB.∵kQA=(1"-" y)/2,kQB=(3"-" y)/4,∴(1"-" y)/2=-(3"-" y)/4.解得y=5/3,即点Q的坐标为 0,5/3 ,∴k入=kQA=(1"-" y)/2=-1/3.(方法2)设Q(0,y),如图,点B(4,3)关于y轴的对称点为B'(-4,3), kAB'=(1"-" 3)/(2+4)=-1/3,由题意得,A、Q、B'三点共线.从而入射光线的斜率为kAQ=kAB'=-1/3.所以,有(1"-" y)/2=(1"-" 3)/(2+4),解得y=5/3,点Q的坐标为(0,5/3).
直线与圆的位置关系教学设计人教A版高中数学选择性必修第一册
切线方程的求法1.求过圆上一点P(x0,y0)的圆的切线方程:先求切点与圆心连线的斜率k,则由垂直关系,切线斜率为-1/k,由点斜式方程可求得切线方程.若k=0或斜率不存在,则由图形可直接得切线方程为y=b或x=a.2.求过圆外一点P(x0,y0)的圆的切线时,常用几何方法求解设切线方程为y-y0=k(x-x0),即kx-y-kx0+y0=0,由圆心到直线的距离等于半径,可求得k,进而切线方程即可求出.但要注意,此时的切线有两条,若求出的k值只有一个时,则另一条切线的斜率一定不存在,可通过数形结合求出.例3 求直线l:3x+y-6=0被圆C:x2+y2-2y-4=0截得的弦长.思路分析:解法一求出直线与圆的交点坐标,解法二利用弦长公式,解法三利用几何法作出直角三角形,三种解法都可求得弦长.解法一由{■(3x+y"-" 6=0"," @x^2+y^2 "-" 2y"-" 4=0"," )┤得交点A(1,3),B(2,0),故弦AB的长为|AB|=√("(" 2"-" 1")" ^2+"(" 0"-" 3")" ^2 )=√10.解法二由{■(3x+y"-" 6=0"," @x^2+y^2 "-" 2y"-" 4=0"," )┤消去y,得x2-3x+2=0.设两交点A,B的坐标分别为A(x1,y1),B(x2,y2),则由根与系数的关系,得x1+x2=3,x1·x2=2.∴|AB|=√("(" x_2 "-" x_1 ")" ^2+"(" y_2 "-" y_1 ")" ^2 )=√(10"[(" x_1+x_2 ")" ^2 "-" 4x_1 x_2 "]" ┴" " )=√(10×"(" 3^2 "-" 4×2")" )=√10,即弦AB的长为√10.解法三圆C:x2+y2-2y-4=0可化为x2+(y-1)2=5,其圆心坐标(0,1),半径r=√5,点(0,1)到直线l的距离为d=("|" 3×0+1"-" 6"|" )/√(3^2+1^2 )=√10/2,所以半弦长为("|" AB"|" )/2=√(r^2 "-" d^2 )=√("(" √5 ")" ^2 "-" (√10/2) ^2 )=√10/2,所以弦长|AB|=√10.
圆与圆的位置关系教学设计人教A版高中数学选择性必修第一册
1.两圆x2+y2-1=0和x2+y2-4x+2y-4=0的位置关系是( )A.内切 B.相交 C.外切 D.外离解析:圆x2+y2-1=0表示以O1(0,0)点为圆心,以R1=1为半径的圆.圆x2+y2-4x+2y-4=0表示以O2(2,-1)点为圆心,以R2=3为半径的圆.∵|O1O2|=√5,∴R2-R1<|O1O2|<R2+R1,∴圆x2+y2-1=0和圆x2+y2-4x+2y-4=0相交.答案:B2.圆C1:x2+y2-12x-2y-13=0和圆C2:x2+y2+12x+16y-25=0的公共弦所在的直线方程是 . 解析:两圆的方程相减得公共弦所在的直线方程为4x+3y-2=0.答案:4x+3y-2=03.半径为6的圆与x轴相切,且与圆x2+(y-3)2=1内切,则此圆的方程为( )A.(x-4)2+(y-6)2=16 B.(x±4)2+(y-6)2=16C.(x-4)2+(y-6)2=36 D.(x±4)2+(y-6)2=36解析:设所求圆心坐标为(a,b),则|b|=6.由题意,得a2+(b-3)2=(6-1)2=25.若b=6,则a=±4;若b=-6,则a无解.故所求圆方程为(x±4)2+(y-6)2=36.答案:D4.若圆C1:x2+y2=4与圆C2:x2+y2-2ax+a2-1=0内切,则a等于 . 解析:圆C1的圆心C1(0,0),半径r1=2.圆C2可化为(x-a)2+y2=1,即圆心C2(a,0),半径r2=1,若两圆内切,需|C1C2|=√(a^2+0^2 )=2-1=1.解得a=±1. 答案:±1 5. 已知两个圆C1:x2+y2=4,C2:x2+y2-2x-4y+4=0,直线l:x+2y=0,求经过C1和C2的交点且和l相切的圆的方程.解:设所求圆的方程为x2+y2+4-2x-4y+λ(x2+y2-4)=0,即(1+λ)x2+(1+λ)y2-2x-4y+4(1-λ)=0.所以圆心为 1/(1+λ),2/(1+λ) ,半径为1/2 √((("-" 2)/(1+λ)) ^2+(("-" 4)/(1+λ)) ^2 "-" 16((1"-" λ)/(1+λ))),即|1/(1+λ)+4/(1+λ)|/√5=1/2 √((4+16"-" 16"(" 1"-" λ^2 ")" )/("(" 1+λ")" ^2 )).解得λ=±1,舍去λ=-1,圆x2+y2=4显然不符合题意,故所求圆的方程为x2+y2-x-2y=0.
自主选择课余生活 说课稿
我说课的题目是小学道德与法治五年级上册《自主选择课余生活》。下面我将从教材分析、学情分析、教学目标与重难点、教法与学法、教学过程、板书设计6个方面进行说课。一、教材分析《自主选择课余生活》是统编教材小学《道德与法治》五年级上册第一单元第1课，共有三个话题，本节课学习的是第三个话题《过好我们的课余生活》，主要是引导学生课余生活的选择既有兴趣，又有意义，要学习规划自己的课余生活，学会过好课余生活的方法，旨在引导学生能够过好课余生活，让课余生活促进学生的健康成长。二、学情分析自主选择是学生的权利，也是成长过程中需要发展的能力。随着年龄的增长和知识、经验的增多，学生对一些事情有了自己的看法，特别是希望能按照自己的想法安排课余生活。但是他们现在的课余生活大都是家长来主导，学生自主选择课余活动的机会几乎很少。因此，要帮助引导学生面对成长中的这个困惑，通过有效的教学能够过好课余生活，让课余生活促进学生的健康成长。三、教学目标与重难点基于教材、学情的分析，以及对小学道德与法治课程的理解，我确定了本节课的教学目标与重难点。教学目标我确定了三个。
高中生物苏教版必修一《31生命活动及本单位-细胞》教案
本章是第三章第一节的开端，学生在第二节已经学习了元素的组成和一些生物大分子，本节课内容是学会使用显微镜，这是生物学习过程中最为重要的一种手段之一。对于今后的实验学习有着极其重要的作用。 学生中大部分同学在初中阶段都有接触过光学显微镜，所以在学习理论知识的时候能够顺利的进行，但因为学校的条件有限，不能保证同学们进行显微镜的实验，本节课结合学生情况和实际情况，采用图片和模型展示的方法进行。 知识与能力 1、概述细胞学说建立的过程。 2、概述细胞学说的内容和意义。 3、学习制作临时玻片标本，使用显微镜和绘图的能。
人教版高中英语必修4Women of achievement说课稿4篇
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.
人教版高中英语必修4Body Language说课稿4篇
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.
人教版高中地理必修2绿色产品知多少说课稿
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。
人教版高中英语必修4A taste of English Humor说课稿3篇
Then I would ask them to think of a funny English or Chinese and tell it to partners. While telling stories, they can use expressions and some acting to help make the story funny. 5 minutes would be given to do this.Those stories they told there will be the material for their writing. Soletting them tell it at first is helpful. And they can make a difference between telling a funny story and writing it down. Generally speaking, it is difficult forstudents to write well because they don’t know what to write and how to write. Asking them to tell their own stories at first can help them come up with what to write.After their telling, I would invite someone to share his/her story with all of us and I would write it down on the blackboard.This example story would be used as a sample to illustrate the format of funny story. Different from a story from teacher or textbook, a story from students can obviously become a interesting material to draw students’ attention.Then I would ask the whole class to put this story into several parts. It might be a little bit difficult for them. So I would ask them to find out whether all the sentences are necessary. After delete some sentences, there are 6 sentences left behind. Then they can easily put them into three parts. After interaction with students, I would teach them the right terms for each part and conclude the format of funny story.This step is the key and difficult point in my lesson. So I mainly usetask-based teaching method in this part and the task for students was divided into several stages. With the separated difficult level, students can find there are usually three parts in writing. They can also learn to write without the unnecessary parts in the process of analyzing. And then I wouldn’t rush to tell them the right terms to them directly. Instead, I would ask them to name them by their own. A confused mind is better for acquiring knowledge.While-writing:Then I would give students 7 minutes to write down this story, without other requirements.With all the preparations in pre-writing, students’ difficulties were cleared. So it would be much easier for them to write down the story within 7 minutes. There are no other requirements because students’ first writing is actually a drafting. It would be revise and edit several times later. Writing, as a skill
人教版高中英语必修3Canada-the true north说课稿4篇
Good afternoon, teachers, It’s my great pleasure to be here sharing my lesson with you.The content of my lesson is Senior English Book 3 Unit 5 Canada —— “The true North”.I’ll be ready to begin this lesson from five parts. Analysis of the teaching material,the teaching methods,the studying methods, the teaching procedure,and Blackboard design.First, let me talk about the teaching material.Part 1 Teaching Material:This unit is about the introduction of Canada. By studying of this unit,we’ll enable the students to learn the geography, population, main cities, and natural beauty, natural resources of Canada. Through the training of the unit, it also requires students to learn some Language skills such as the expressions of position and emotions.So it plays an important part in the English teaching in this book.After studying the teaching material and analyzing the rule of children’s growing of mind,I think the teaching aims are the followings:1.Knowledge objects:(1) make the students learn some new words and phrases(2) make the students understand the content of the lesson.2.Ability objects:(1)To develop the Ss’ abilities of listening, speaking, reading and writing. Especially reading and speaking ability.(2) learn to talk about the characters of Canada in English(3)To train the Ss’ ability of working in pairs.3.Emotion objects:(1)Enable students to understand the characters of Canada..(2)Stimulate Ss to work hard to make China stronger.Part 2 Teaching Methods:I think helping students learn to master new words and phrases and improve the students’ reading and speaking ability is import and the difficult.According to the analysis of the teaching material and the import points and the difficult points,I will use the following teaching methods : question-guiding approach; fast-reading and careful reading; multi-media teaching methods; discussion