驻马店市第十三中学 2016-2017学年度第二学期
学科：数学 教研组长审批： 周次：1
课题： 序号 1 3.1 圆 备课组 九年级 主备人 岳素贞 授课时间 2017年 2月 1 教 1．理解确定圆的条件及圆的表示方法；(重点) 学 2．掌握圆的基本元素的概念；(重点) 目 标 3．掌握点和圆的三种位置关系．(难点)
重 理解确定圆的条件及圆的表示方法；(重点) 点 难 点 掌握点和圆的三种位置关系．(难点) 教学方法 讲练结合 教具 教 一、情境导入 二次备课 古希腊的数学家认为：“一切立体图形中最美的是球 形，一切平面图形中最美的是圆形．”它的完美来自于 中心对称，无论处于哪个位置，都具有同一形状，它学 最谐调、最匀称．观察图形，从中找到共同特点． 过 二、合作探究 探究点一：圆的有关概念 【类型一】 圆的有关概念 下列说法中，错误的是( ) A．直径相等的两个圆是等圆 程 B．长度相等的两条弧是等弧 C．圆中最长的弦是直径 D．一条弦把圆分成两条弧， 【类型二】 圆的概念的应用 如图，CD是⊙O的直径，点A为DC延长线上一点，AE交⊙O于点B，连接OE，∠A＝20°，AB＝OC，求∠DOE的度数． .. 解析： 探究点二：点与圆的位置关系 【类型一】 判定几何图形中的点与圆的位置关系 在Rt△ABC中，∠C＝90°，AB＝10，BC＝8，点D、E分别为BC、AB的中点，以点A为圆心，AC长为半径作圆，请说明点B、D、C、E与⊙A的位置关系． 解析：先根据勾股定理求出AC的长，再由点D、E分别为BC、AB的中点求出AD、AE的长，进而可得出结论． 解：∵在Rt△ABC中，∠C＝90°，AB＝10，BC＝8，∴AC＝ AB2－BC2＝102－82＝6.∵AB＝10＞6，∴点B在⊙A外；∵在Rt△ACD中，∠C＝90°，∴AD＞AC，∴点D在⊙A外；∵AC＝AC，∴点C在⊙A上；∵E为AB的中点，∴AE＝AB＝5＜6，∴点E在⊙A内． 方法总结：解决本题关键是掌握点与圆的三种位置关系． 【类型二】 根据点与圆的位置关系确定圆的半径的取值范围 有一长、宽分别为4cm、3cm的矩形ABCD，以A为圆心作⊙A，若B、C、D三点中至少有一点在圆内，且至少有一点在圆外，则⊙A的半径r的取值范围是__________． 【类型三】 在平面直角坐标系中判断点与圆的位置关系 如图，⊙O′过坐标原点，点O′的坐标为(1，1)，试判断点P(－1，1)，点Q(1，0)，点R(2，2)与⊙O′的位置关系． 12.. 解 【类型四】 点与圆的位置关系的实际应用 如图，城市A的正北方向50千米的B处，有一无线电信号发射塔．已知，该发射塔发射的无线电信号的有效半径为100千米，AC是一条直达C城的公路，从A城发往C城的客车车速为60千米/时． (1)当客车从A城出发开往C城时，某人立即打开无线电收音机，客车行驶了0.5小时的时候，接收信号最强．此时，客车到发射塔的距离是多少千米(离发射塔越近，信号越强)? (2)客车从A城到C城共行驶2小时，请你判断到C城后还能接收到信号吗？请说明理由． 解：(1)过点B作BM⊥AC于点M，则此时接收信号最强．∵AM＝60×0.5＝30(千米)，AB＝50千米，∴BM＝40千米．所以，客车到发射塔的距离是40千米； (2)到C城后还能接收到信号．理由如下：连接BC，∵AC＝60×2＝120(千米)，AM＝30千米，∴CM＝AC－AM＝90千米，∴BC＝CM2＋BM2＝1097千米＜100千米．所以，到C城后还能接收到信号． 方法总结：解决本题的关键是能够正确理 板 书 设 计 圆 1．圆的有关概念 2．点和圆的位置关系 设☉O的半径为r，点P到圆心的距离OP＝d，则有： 点P在圆外⇔d＞r； 点P在圆上⇔d＝r； 点P在圆内⇔d＜r. 教 .. 学反思
驻马店市第十三中学 2016-2017学年度第二学期
学科： 教研组长审批： 周次： 课题： 备课组 教 学 目 标 重 点 难 点 教学方法 主备人 授课时间 - 序号 2 年 月 日 教具 .. 教 学 过 程 二次备课 板书设计
驻马店市第十三中学 2016-2017学年度第二学期
学科： 教研组长审批： 周次： 课题： 备课组 教 学 目 标 重 主备人 授课时间 - 序号 年 月 日 .. 点 难 点 教学方法 教 学 过 程 教具 二次备课 板书设计
驻马店市第十三中学 2016-2017学年度第二学期
学科： 教研组长审批： 周次： 课题： 备课组 教 学 目 标 重 主备人 授课时间 - 序号 年 月 日 .. 点 难 点 教学方法 教 学 过 程 教具 二次备课 板书设计
驻马店市第十三中学
2016-2017学年度第二学期
学科： 教研组长审批： 周次： 课题： 备课组 教 学 目 主备人 授课时间 - 序号 年 月 日 .. 标 重 点 难 点 教学方法 教 学 过 程 教具 二次备课 板书设计
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2016—2017学年度第一学期
学科：九年级英语 教研组长审批： 周次： 分数：
课题：Unit7 Where would you like to visit? Section 序号 .. A 1a-1c (period 2) 备课组 Grade 8 执笔人 授课时间 2016年 月 日 （1）Train students to talk about places they would like to visit 教 学 with the target language． 目 （2）Train students to describe vacations with different 标 adjectives． （3）Train students’ listening skill． 重 Describe vacations with different adjectives． 点 难 点 Talk about different places with the target language． 教学方法 教具 教Step 1. 1. Check the new words . 二次备课 学tiring adj. 过educational adj. 程 peaceful adj. fascinating adj. thrilling adj. take it easy Florida trek v. Amazon jungle n. Niagara Falls What kind of places would you like to go on vacation? Step 2. Let’s talk and learn. Tell which place you’d like to visit and why. A: Where would you like to visit? B: I like to … because … Step 3. Let’s extend and improve. Some useful expressions 1.goonvacation 2. trek through the jungle 3. go trekking 4. hope to do sth. 5. some day / one day 6. go somewhere relaxing Step 4. Let’s practice and improve. --- Can a plane fly _____ the Atlantic Ocean? --- Yes but it needs to go _____ the clouds for hours. (2011 山东烟台) A. across through B. through across .. 板书设计 教学反思 C. across across D. through through 答案：A 解析：across，表示从物体的表面“穿过，越过”； through 表示从某物的内部“穿过”。句中“飞越大西洋”要使用 fly across， 从云层中“穿过”，要使用 through。 The young men walked ______ the forest and came to a big river at last. (2009漳州中 考) A. on B. over C. through D. across 选 C The policeman helped the old woman _____ the road. (2008芜湖中考) A. above B. across C. through D. over 选 B Step 5.Let’s sum up.
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2016—2017学年度第一学期
学科：九年级英语 教研组长审批： 周次： 分数： 课题：Unit7 Where would you like to visit? Section A 序 3a-4 (period 3) 号 备课组 Grade 8 执笔人 授课时间 年 月 日 （1）Train students to talk about places they would like to visit 教 with the target language． 学 目 （2）Train students to describe vacations with different 标 adjectives． （3）Train students’ listening skill． 重 Describe vacations with different adjectives． 点 难 点 Talk about different places with the target language． 教学方法 教具 教Step 1. 1. Check the new words . 二次备课 学touristy adj. spotlight n.consider 过v. 程 lively adj. sight n. including prep. tower n.church n.convenient adj.underground adj. general n.in general wine n.translate v. pack v.light adj. Step 2. Read and learn. 1.Where is Paris?2.Are there any beaches?3.What is the most famous sight in Paris?4.Do Frenchmen speak English?5.If you go to Paris, how will you visit the city? For your next vacation, why not consider visiting Paris? why not … = why don’t you… 为什么不…… 用于表示提议、劝导等，在why not…?结构中， not后接动词原形。 Why not come and see me tomorrow? = Why don’t you come and see me tomorrow? 6.What do you think of Paris?.. 明天来找我怎么样？ consider是动词,意为“考虑,思考”,相当于think, 后面可以接名词、代词、动词-ing形式或从句。 We're considering moving to Seattle. 我们考虑搬往西雅图。 consider后面还可以接“特殊疑问词+ 动词不定式”结构。 I am considering what to do next. 我正在考虑下一步该做什么。 consider还可以意为“认为”,常用于“be considered (as / to be) + 名词”或“be considered (to be) + 形容 词”结构中,意为“被认为是……(的)”。 Tom is considered (as / to be) a bad student. 汤姆被认为是一名坏学生。 Jean considered herself (to be) very lucky. 琼认为自己非常幸运。 consider用于被动语态,后面还可以接动词不定式,意为“被认为……”。 Mary is generally considered to work hardest.大家公认玛丽工作最努力。 consider的名词形式为consideration, 意为 “考虑”。 step 3. Let’s extend and improve. A: Where would you like to go, Kathy?B: I’d like to visit Kunming.A: Isn’t it supposed to be very hot?B: Yes, it is. I’m only going to pack light clothes. Kunming is also beautiful, and it has lots of wonderful sights. Step 4. Let’s practice and improve. 1. The supermarket is near my home, so it’s ____________ (方便的) for me to go shopping. 2. There is an ___________ (地下的) supermarket in our neighborhood. 3. He told a very ___________ (生动的) story about his life in America. 4. The woman is ill, so she can only do some ___________ (轻的) work. .. 板书设计 教学反思 5. Notre Dame Cathedral is one of the most famous _________ (教堂) in the world. Step 5.Let’s sum up.
2016———2017学年度第一学期
学科：九年级英语 教研组长审批： 周次： 分数：
课题：Unit7 Where would you like to visit? Section B 序 1a-1c (period 5) 号 备课组 Grade 8 执笔人 授课时间 2016年 月 日 （1）Train students to talk about places they would like to visit 教 with the target language． 学 目 （2）Train students to describe vacations with different 标 adjectives． （3）Train students’ listening skill． 重 Describe vacations with different adjectives． 点 难 点 Talk about different places with the target language． 教学方法 教具 教Step 1. 1. Check the new words . 二次备课 学I hope to visit places where: 过the people are friendly. 程 the food is delicious. the weather is nice. it has a long history. there is much to do. there are many places of interest. Step2. Learn and talk. A woman is travelling in a warm place. A girl is watching a great whale in the sea. Many kids are playing happily. .. A: WhLearn and talk. ere would you like to go? B: I’d like to go somewhere warm. A: What else can you tell me? B: I don’t want … Step 3. Let’s extend and improve. What else can you tell me? 形容词else修饰what作后置定语。 else 与 other 的区别： else与other都可作形容词, else只用于修饰不定代词、 疑问代词和疑问副词，并且必须要位于这些修饰词之 后，作后置定语； 而other用来修饰名词，其位置与else正好相反，它位于被修饰的名词之前。 What else could I say? 我还有什么可说的？ There must be somebody else in the classroom. 教室里肯定还有别的人。 I remember I have read the story in other books. 我记得我在别的书上看过这个故事。 Step 4. Let’s practice and improve. 1. We haven’t ___________ where to go on holiday yet. 2. The girl __________ to go to a famous university in Beijing in the future. 3. I have to _________ by myself at noon because my parents aren’t at home. 4. You can find a beautiful park in the ___________ part of the city. 连词成句。 1. go, want, where, tomorrow, do, you, else, to ______________________________________? 2. milk, with, we, the, provided, children ______________________________________. 3. how far, it, from, don’t, I, mind, is, here ______________________________________. 4. me, suggestions, could, you, give, some ______________________________________? Step 5.Let’s sum up. .. 板书设计 教学反思
2016———2017学年度第一学期
学科：九年级英语 教研组长审批： 周次： 分数： 课题：Unit 7 Where would you like to visit? Section 序号 B 3a-4 (period 6) 备课组 Grade 8 执笔人 Zhai 授课时间 2012年 月 日 Haiyan （1）Train students to talk about places they would like to visit 教 学 with the target language． 目 （2）Train students to describe vacations with different 标 adjectives． （3）Train students’ listening skill． 重 Describe vacations with different adjectives． 点 难 点 Talk about different places with the target language． 教学方法 教具 教Step 1. 1. Check the new words . 二次备课 学Ace Travel 过Eastern adj 程 provide v. firm n. spot n. Confucius Where would you like to travel? .. 板书设计 教学反思 Do you like to travel alone or with others? Why? What do you think about a trip? Step2. Learn and talk. 1. The person has a lot of money to spend on the vacation. ______ 2. The person wants to relax and do nothing on vacation. ______ 3. The person is a man. ______ 4. The person has children . ______ 5. The person likes to swim. ______ 6. The person wants to go to another country. ___ 1.Who will the author travel with? 2. When do they want to take a trip? 3. What place would they like to travel? Step 3. Let’s extend and improve. Imagine you work for Ace Travel Agency. Write an e-mail message to S.T. Zhang. Tell where you think he or she should go on vacation. Step 4. Let’s practice and improve. Complete the survey using words from the box and any other words. Then survey three students. Agree on the best place to go. I’d like to go to Qufu. B: Why go to Qufu? A: Confucius was born there. It’s very educational. Step 5.Let’s sum up.
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驻马店市第十三中学 中
2016-2017学年度第一学期
学科：九年级英语 教研组长审批： 周次： 分数：
课题：Unit 7 Where would you like to visit? Section 序号 A 3a-4 (period 4) 备课组 Grade 8 执笔人 Zhai 授课时间 2012年 月 日 Haiyan （1）Train students to talk about places they would like to visit 教 学 with the target language． 目 （2）Train students to describe vacations with different 标 adjectives． （3）Train students’ listening skill． 重 Describe vacations with different adjectives． 点 难 点 Talk about different places with the target language． .. 教学方法 教具 教Step 1. 1. Check the new words . 二次备课 学Step2. Learn and talk 过.For your next vacation, why not consider ______ 程 Paris? Paris is the ______of France, and is one of the liveliest _____in Europe. It doesn’t have any beaches or mountains, but there are _____many things to do there. For example, it has some fantastic sights, _________ the Eiffel Tower and Notre Dame cathedral, one of the most _______churches in the world. Traveling around Paris by taxi can_______ a lot of money, but it’s usually quite convenient to ______ the underground train to most places. In general, though, France is ______an expensive place. One thing that is not expensive in France, however, is the ______. Most people in France have learned ________. But many people don’t like to speak English, __________ in Paris. So unless you speak French yourself, it’s ________to travel with someone who can translate things for you. Step 3. Let’s extend and improve. Sample conversation 1: A: Where would you like to go, Kathy? B: I’d like to visit Hong Kong. A: Isn’t it supposed to be very crowded? B: Yes, it is. But Hong Kong is also very interesting and it offers us a lot of entertainments. Sample conversation 2: A: Where would you like to go, Kathy? B: I’d like to visit Mexico City. A: Isn’t it supposed to be very relaxing? B: Yes, it is. But Mexico city is also exciting. We have a lot of things to do. Step 4. Let’s practice and improve. consider是动词，意为“仔细考虑，深思熟虑”，后面可接名词、从句、副词，接动词时要用v-ing形式。 e. g. We considered his suggestion. 我们仔细考虑了他的建议。 He is considering studying abroad. 他正在考虑出国留学。 .. We considered how we should help them. 我们仔细考虑应该如何帮助他们。 Consider carefully before you decide. 你要慎重考虑后再决定。 one of+最高级+名词复数, 意为 “最……的之一”。 So unless you speak French yourself, it’s best to travel with someone who can translate things for you. 所以除非你本人说法语,最好和一个 能替你翻译法语的人一起来巴黎旅游。 unless 除非……,引导条件状语从句。 比“if…not”略微正式。 Step 5.Let’s sum up. 板书设计 教学反思
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