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新人教版高中英語必修2Unit 5 Music-Listening and Speaking教案
This lesson is about music. Students can classify the types of music through the instruments and its sound and can talk about their preferences about music, even join some activities and play a role in them according to their musical talents. On the basis, they are guided to use the languages to express their preferences and some plosive sounds and their rules.1. Classify the music types through the instruments and its sound.2. Listen and understand what the speakers’ preferences are and the reasons; talk about their own preferences and give their own reasons, using these sentences: “What kind of music do you like? And why? “ “Because it makes/gives me energy/peaceful.../touches my heart...”.3. Learn some plosives and the rules.4. Join some activities and play a role in them according to the talents. 1. Listen and understand what the speakers’ preferences are and the reasons;2. talk about their own preferences and give their own reasons, using these sentences: “What kind of music do you like? And why? “ “Because it makes/gives me energy/peaceful.../touches my heart...”.3. Learn some plosives and incomplete plosives and its rules.Step 1 Lead inPoint at the pictures on P50 and ask Q1: What are the people doing in the pictures below?Q2: What kind of music they are?Then play the MP3s one by oneStep 2 ListeningTask 1: A reporter from the school newspaper is interviewing students about music. Listen to the interviews. Draw lines between the words to make complete sentences. Some words will not be used.
新人教版高中英語必修2Unit 5 Music-Reading and Thinking教案二
1. Get basic information about Eric; read deeply to understand the history and development of the virtual choir.2. Understand what the function of the virtual choir is and how to make a virtual choir.3. Understand the meaning of some languages in the context of the text through question guidance, such as “Many people do not have close friends or contacts who have the same interest in music.” and so on.Step 1 Leading-in1. Answer the following questions.Q1：Do you know the Apps like Tik Tok and Quick Hand?Q2: Do you want to make a Tik Tok video or a Quick Hand video?2. Play a Tik Tok video Step 2: Understanding the title Q1：What does the title mean ?Q2: Is the article a narration or exposition? Why? Q3: Can you change the title ? If you can, what is the title?Step 3: Scanning the whole text and getting the basic information1. Answer the following questions.Q1：Who came up with the idea for a virtual choir?Q2: Where did Eric studied the musical composition?Q3: What is his song?2. Find the main idea of each paragraph3. Deal with some new words.Step 4: Reading carefully to get detailed informationPara 1 How to make a virtual choir1. PreparationA. tools: a virtual camera; an Internet connectionB. hero/heroin: friends or some individuals who have the same interests2. Process
新人教版高中英語必修2Unit 5 Music-Reading and Thinking教案一
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.
新人教版高中英語必修2Unit 5 Music-Reading for Writing教案二
The Internet celebrity Gao Yifeng. Years ago, he owned 5 companies and the staffs over 1,000, but during the economy crisis, he became nothing but debt. He was so worried that his hair became white overnight. There was a time when he wanted to killed himself. But after listening to the song Start Over by Liu Huan, he decided to cheer himself up. He started a steamed bun shop and gradually became a national chain shops. Now he became successful again.Walter Haddon said, “Music is the medicine of a troubled mind.” Music contains such a pleasant and inspiring force. Music gave him courage and bravery. When he listened to the song, it made his spirit fly like a kite in the wind. Music gave him strength and brought him relief. It was the rock I leant on to become strong and to get through those hard times. I hope none of us have to go through the same kind of suffering that he did. At the same time, we all go through various periods when we feel sad or alone. During those times, music can help us in the same way that it helped him. I hope we all will somehow begin to treasure music and make it a part of our life. Thank you for your listening !5.Revise your writing each other.Does he/she explain how music has changed his/her/someone else’s life?Are some of the rhetorical devices included and used properly ?Does he/she talk about how music makes him/her/someone feel?Is the first word in each sentences capitalised?Does he/she use correct punctuation ?
新人教版高中英語必修2Unit 5 Music-Reading For Writing教案一
(4)Now we have heard a number of outstanding speeches ... 我們已經(jīng)聆聽了許多精彩的發(fā)言……(5)Because we wanted the nations of the world, working together, to deal with ... 因為我們希望全世界各國團結(jié)起來去應(yīng)對……(6)And if we do not act ... 如果我們不采取行動……(7)Now, I share the concerns that have been expressed ... 我也同意對于……表達的擔心(8)Let us show the world that by working together we can ... 讓我們告訴全世界，通過一起努力我們可以……(9)It is now time for us to ... 是時候我們……(10)And I have always wished that ... 我一直希望……(11)Thank you for letting me share this day with me.感謝你們和我共度這一天。實踐演練：假如你是高中生李華，你校將舉辦一次以“音樂”為主題的演講比賽，請你按照主題，寫下你的演講稿。注意：詞數(shù)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!
新人教版高中英語必修3Unit 2 Morals and Virtues教學設(shè)計二
Activity 41. Students complete the task of activity 4, then teachers and students check the answers. 2. The teacher organized the students to work together and asked them to use the tables and mind maps sorted out before to retold the important choices in Lin Qiaozhi's life and their resultsStep 5 Language points1. The teacher asks the students to read the text carefully, find out the core words and long and difficult sentences in the text and draw lines, understand the use of vocabulary, and analyze the structure of long and difficult sentences. 2. The teacher explains and summarizes the usage of core vocabulary and asks the students to take notes. 3. The teacher analyzes and explains the long and difficult sentences that the students don't understand, so that the students can understand them better. Step 6 Homework1. Read the text again, in-depth understanding of the text; 2. Master the use of core vocabulary and understand the long and difficult sentences. 3. Complete relevant exercises in the guide plan. 1、通過本節(jié)內(nèi)容學習，學生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過本節(jié)內(nèi)容學習，學生能否結(jié)合文本特點總結(jié)林巧稚的人生原則和人格品質(zhì)特征；3、通過本節(jié)內(nèi)容學習，學生能否針對人生抉擇發(fā)表自己的看法；能否全面地、客觀地、理性地看待問題，進而對道德和人性有更加深入的思考和理解。
新人教版高中英語必修3Unit 2 Morals and Virtues教學設(shè)計三
The joke set her crying.這個玩笑使她哭起來。Step 5 ReadingActivity 31. Students read the small text in activity 3. The teacher provides several small questions to check whether students understand the content of the text and the ideographic function of the -ing form in the text.*Where are those people?*Why did Dr Bethune come to China?*How did he help the Chinese people during the war?*What did Chairman Mao Zedong say about him?2. Ss try to rewrite some sentences using the -ing form. Then check the answers. When checking the answers, the teacher can ask different students to read the rewritten sentences and give comments.Answers:1. he became very interested in medicine, deciding to become a doctor.2. …after hearing that many people were dying in the war.3. Helping to organise hospitals, he taught doctors and nurses, and showed people how to give first aid./ He helped to organise hospitals, teaching doctors and nurses, and showing people how to give first aid.4. …praising Dr Bethune as a hero to be remembered in China.Step 6 PracticeActivity 4Students complete grammar activities 2 and 3 on page 69 of the workbook.Step 6 Homework1. Understand and master the functions and usage of the -ing form;2. Finish the other exercises in Using structures.1、通過本節(jié)內(nèi)容學習，學生是否理解和掌握動詞-ing形式作賓語補足語語和狀語語的功能和意義；2、通過本節(jié)內(nèi)容學習，學生能否正確使用動詞-ing形式描述人物的行為、動作及其經(jīng)歷；3、通過本節(jié)內(nèi)容學習，學生能否獨立完成練習冊和導學案中的相關(guān)練習。
新人教版高中英語必修3Unit 2 Morals and virtues教學設(shè)計一
(2) students are divided into groups according to the requirements of activity 3. Each student shares a story of personal experience or hearing-witnessing kindness, and then selects the most touching story in the group and shares it with the whole class. Before the students share the story, the teacher can instruct them to use the words and sentence patterns in the box to express. For example, the words in the box can be classified:Time order: first of all, then, after that, later, finally logical relationship :so, however, although, butTeachers can also appropriately add some transitional language to enrich students' expression:Afterwards, afterwards, at last, in the end, eventuallySpatial order: next to, far from, on the left, in front ofOtherwise, nevertheless, as a result, therefore, furthermore, in addition, as well asSummary: in a word, in short, on the whole, to sum up, in briefStep 8 Homework1. Understand the definition of "moral dilemma" and establish a correct moral view;2. Accumulate vocabulary about attitudes and emotions in listening texts and use them to express your own views;3. Complete relevant exercises in the guide plan.1、通過本節(jié)內(nèi)容學習，學生能否理解理解“道德困境”的定義；2、通過本節(jié)內(nèi)容學習，學生能否通過說話人所表達的內(nèi)容、說話的語氣、語調(diào)等來判斷其態(tài)度和情緒；3、通過本節(jié)內(nèi)容學習，學生能否針對具體的道德困境發(fā)表自己的看法和見解，能否掌握聽力理訓練中的聽力策略。
人教版高中地理必修2工業(yè)地域類型教案
1．生產(chǎn)上的聯(lián)系：有投入——產(chǎn)出的關(guān)系工業(yè)生產(chǎn)的過程復雜，工序繁多，往往需要經(jīng)過多家工廠的加工才能完成一種產(chǎn)品的生產(chǎn)過程。因此，在這些工廠之間就存在著產(chǎn)品與原料的聯(lián)系。一家工廠生產(chǎn)的產(chǎn)品是另一家工廠的原料，這兩家工廠之間就形成了工序上的工業(yè)聯(lián)系。2．非生產(chǎn)上的聯(lián)系：如地理空間上的聯(lián)系布局在同一個工業(yè)區(qū)內(nèi)，共同利用工業(yè)區(qū)的道路、供水、供電、通信等基礎(chǔ)設(shè)施以及其他生產(chǎn)、生活服務(wù)設(shè)施，或者共同利用當?shù)亓畠r的勞動力，形成了空間利用上的工業(yè)聯(lián)系。我國許多地方的經(jīng)濟技術(shù)開發(fā)區(qū)就是建立在這種工業(yè)聯(lián)系基礎(chǔ)上的。（二）工業(yè)集聚1．形成具有工業(yè)聯(lián)系的一些工廠往往近距離地聚集起來，形成工業(yè)集聚現(xiàn)象。2．工業(yè)集聚可獲得效應(yīng)（1）工業(yè)集聚可以加強企業(yè)間的信息交流和技術(shù)協(xié)作，降低中間產(chǎn)品的運輸費用和能源消耗，進而降低生產(chǎn)成本，提高生產(chǎn)效率和利潤，取得規(guī)模效益。
人教版高中地理必修2農(nóng)業(yè)的區(qū)位選擇教案
【教學目標】 （1）、區(qū)位的含義；（2）、農(nóng)業(yè)區(qū)位選擇的主要因素；（3）、農(nóng)業(yè)地域的概念、類型?！窘虒W重、難點及解決辦法] 】重點：影響農(nóng)業(yè)的主要自然區(qū)位因素；社會經(jīng)濟因素及其發(fā)展變化對農(nóng)業(yè)區(qū)位的影響。難點：運用所學原理，合理評價選擇農(nóng)業(yè)區(qū)位。解決方法：知識講授、案例分析、問題探究與討論【教學準備】多媒體課件缺勤登記：三、自然因素的利用和改造1.充分利用：光熱水土并擴大范圍2.及時改造：使之更合理地發(fā)展農(nóng)業(yè)四、社會經(jīng)濟因素的發(fā)展變化1.市場區(qū)位及需求的變化2.交通運輸條件的改善和冷藏技術(shù)的發(fā)展，擴展了市場
人教版高中語文必修1《論語》教案2篇
【教學意圖】要了解中國傳統(tǒng)文化，必須閱讀古詩文名著名篇。但在中國文化形成過程中影響最大的是什么？可以說是儒家學說，包括《論語》這部經(jīng)典?！墩撜Z》等書是讀書人求仕做官的必修課本，是知識分子的思想言行基礎(chǔ)，而且影響到整個社會生活，內(nèi)容包括倫理道德、教育體制、民間習俗等方面的思想。因此，要了解中國傳統(tǒng)文化，有必要讀一讀《論語》。【教學設(shè)計】因《論語》的年代已久遠，對學生而言，要理解透徹文句是比較深奧困難的，因此必須在充分理解文意的基礎(chǔ)上，對《論語》進行思想上的解讀?？捎山處煆摹墩撜Z》中概括出幾點與生活、現(xiàn)實相關(guān)的要點，要求學生分組進行透徹的學習和領(lǐng)會，如“小人與君子”、“學習的方法”、“教育的理念”等等。〖教學重點、難點〗讀《論語》知儒家思想?！冀虒W方法〗講解啟發(fā)、探究梳理、拓展延伸。
人教版高中語文必修1《優(yōu)美的漢字》教案2篇
書法藝術(shù)的繁榮期，是從東漢開始的東漢時期出現(xiàn)了專門的書法理論著作，最早的書法理論提出者是東西漢之交的揚雄第一部書法理論專著是東漢時期崔瑗的《草書勢》漢代書法家可分為兩類：一類是漢隸書家，以蔡邕為代表一類是草書家，以杜度、崔瑗、張芝為代表，張芝被后人稱之為“草圣”最能代表漢代書法特色的，莫過於是碑刻和簡牘上的書法東漢碑刻林立，這一時期的碑刻，以漢隸刻之，字型方正，法度謹嚴、波磔分明此時隸書已登峰造極漢代創(chuàng)興草書，草書的誕生，在書法藝術(shù)的發(fā)展史上有著重大意義它標志著書法開始成為一種能夠高度自由的抒發(fā)情感，表現(xiàn)書法家個性的藝術(shù)草書的最初階段是草隸，到了東漢時期，草隸進一步發(fā)展，形成了章草，后由張芝創(chuàng)立了今草，即草書
人教版高中語文必修2《蘭亭集序》教案3篇
三、指導第一段的背誦，點撥理解句意，強調(diào)關(guān)鍵詞語，注重文言基礎(chǔ)知識教學。過程中要讓學生反復讀背。背誦線索：時間——地點——事件——人物——環(huán)境——活動——天氣——感覺。時間：永和九年，歲在癸丑，暮春之初。地點：會于會稽山陰之蘭亭。事件：修稧事也。人物：群賢畢至，少長咸集。環(huán)境：此地有崇山峻嶺，茂林修竹；又有清流激湍，映帶左右?；顒樱阂詾榱饔x曲水，列坐其次。雖無絲竹管弦之盛，一觴一詠，亦足以暢敘幽情。天氣：是日也，天朗氣清，惠風和暢。感覺：仰觀宇宙之大，俯察品類之盛，所以極視聽之娛，信可樂也。四、學生自讀背誦5分鐘。五、抽一至二名學生試背課文，教師可作必要的線索提示。第二課時一、聽名家示范朗誦，學生小聲跟讀。二、復習鞏固第一自然段的閱讀背誦。三、朗讀、解析第二自然段，理解文章“由敘入感”的寫作結(jié)構(gòu)。
人教版高中語文必修3《勸學》教案2篇
五．研習第一段：1．誦讀指導要處理好句中停頓2．請學生對照注釋翻譯本段重點詞句：學不可以已已：停止。青，取之于藍而青于藍于：從；比。木直中繩中：zhàng符合，合于。雖有槁暴，不復挺者，揉使之然也有通又，揉通煣，以火烘木，使其彎曲。然：這樣。翻譯：故木受繩則直，金就礪則利，君子博學而日參省乎己，則知明而行無過矣。所以木材經(jīng)墨線畫過（再用斧鋸加工）就直了，金屬刀劍拿到磨刀石上（磨過）就鋒利了，君子廣博地學習并且每天對自己檢驗反省，就能智慧明達，行為沒有過錯了。3．本段是從哪個角度論述中心論點的？明確：本段是從學習的意義這個角度論述中心論點的。荀子認為人的知識、道德、才能都不是天生成的，而是后天不斷學習獲得的，學習的意義十分重大，所以學習不能停止。4．本段中幾個比喻句是為了說明什么道理？學生討論發(fā)言，教師明確：
人教版高中歷史必修1祖國統(tǒng)一大業(yè)教案2篇
教材分析改革開放后我國的綜合國力不斷增強，人民對祖國統(tǒng)一的愿望越來越迫切。本節(jié)課以“一國兩制”構(gòu)想的提出，香港、澳門的回歸和海峽兩岸關(guān)系的發(fā)展為中心，說明實現(xiàn)祖國統(tǒng)一，完成中華民族復興是歷史發(fā)展的必然。第一目“‘一國兩制’構(gòu)想的提出”主要講述了“一國兩制”的含義及歷史意義。第二目“香港、澳門的回歸”著重講述了香港回歸、澳門回歸的經(jīng)過及歷史意義，這是“一國兩制”成功的實踐。第三目“海峽兩岸關(guān)系的發(fā)展”講述了大陸注重發(fā)展與臺灣的關(guān)系，促進海峽兩岸的經(jīng)濟文化交流與合作，打破了幾十年來海峽兩岸的隔絕狀態(tài)，促進了祖國統(tǒng)一的進程。此外，教材還通過“資料回放”“歷史縱橫”“學思之窗”等欄目，為學生學習提供了一些詳細的史料。在教學中要分析圖表資料，引導學生理解完成祖國統(tǒng)一大業(yè)，實現(xiàn)中華民族的復興，是任何人也阻擋不了的歷史潮流。
人教版高中歷史必修3宋明理學教案2篇
二、程朱理學：1、宋代“理學”的產(chǎn)生：（1）含義：所謂“理學”，就是用“理學”一詞來指明當時兩宋時期所呈現(xiàn)出來的儒學。廣義的理學，泛指以討論天道問題為中心的整個哲學思潮，包括各種不同的學派；狹義的理學，專指程顥、程頤、朱熹為代表的，以“理”為最高范疇的學說，稱為“程朱理學”。理學是北宋政治、社會、經(jīng)濟發(fā)展的理論表現(xiàn)，是中國古代哲學長期發(fā)展的結(jié)果，是批判佛、道學說的產(chǎn)物。他們把“理”或“天理”視作哲學的最高范疇，認為理無所不在，不生不滅，不僅是世界的本原，也是社會生活的最高準則。在窮理方法上，程顥“主靜”，強調(diào)“正心誠意”；程頤“主敬”，強調(diào)“格物致知”。在人性論上，二程主張“去人欲，存天理”，并深入闡釋這一觀點使之更加系統(tǒng)化。二程學說的出現(xiàn)，標志著宋代“理學”思想體系的正式形成?！竞献魈骄俊克未袄韺W”興起的社會條件：
新人教版高中英語必修3Unit 2 Morals and Virtues教學設(shè)計四
3.Teachers ask different groups to report the answers to the questions and ask them to try different sentence patterns.The teacher added some sentence patterns for students to refer to when writing.Step 4 Writing taskActivity 51.Write the first draft.Students first review the evaluation criteria in activity 5, and then independently complete the draft according to the outline of activity 4, the answers to the questions listed in the group discussion and report, and the reference sentence pattern.2.Change partners.The teacher guides the students to evaluate their partner's composition according to the checklist of activity 5 and proposes Suggestions for modification.3.Finalize the draft.Based on the peer evaluation, students revise their own compositions and determine the final draft.Finally, through group recommendation, the teacher selects excellent compositions for projection display or reading aloud in class, and gives comments and Suggestions.Step 5 Showing writingActivity 5T call some Ss to share their writing.Step 6 Homework1. Read the passage in this section to better understand the passage.2. Carefully understand the hierarchical structure of the article, and deeply understand the plot of the story according to the causes, process and results;3. Independently complete the relevant exercises in the guide plan.1、通過本節(jié)內(nèi)容學習，學生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過本節(jié)內(nèi)容學習，學生能否通過人物言行的對比分析道德故事的深層內(nèi)涵；3、通過本節(jié)內(nèi)容學習，學生能否根據(jù)故事的起因、經(jīng)過和結(jié)果來深入理解故事的情節(jié)，從而了解文章的層次結(jié)構(gòu)；4、結(jié)合現(xiàn)實生活案例發(fā)表自己的見解和看法,寫一篇觀點明確、層次分明的故事評論。
人教版高中地理必修2城市內(nèi)部空間結(jié)構(gòu)教案
過渡：在實際生活中，城市內(nèi)部空間結(jié)構(gòu)并非完全按照這一經(jīng)濟規(guī)律呈現(xiàn)，而是更具復雜性。這說明除了經(jīng)濟因素外，還有很多其他因素在起作用，請大家結(jié)合你的認識、圖2．9和案例1：紐約市的少數(shù)民族區(qū)談?wù)勀愕目捶ā＃?）其他因素I收入——形成不同級別住宅區(qū)的常見原因。有能力支付昂貴租金和選擇最佳居住環(huán)境的人，其居住地往往形成高級住宅區(qū)。II知名度——城市內(nèi)某些地區(qū)在歷史、文化或經(jīng)濟方面具有很高的聲譽，這往往會吸引更多新的住宅或商場建在該處，以提高其知名度。III種族聚居區(qū)的形成——在有些城市的某一區(qū)域內(nèi)，如果某個種族或宗教團體占優(yōu)勢，就可能形成種族聚居區(qū)。如紐約市的唐人街、哈林區(qū)、小意大利區(qū)等。IV歷史因素——城市的建筑物和街道設(shè)計可以維持久遠，早期的土地利用方式對日后的功能分區(qū)有著深遠的影響。
人教版高中地理必修2第二章第二節(jié)不同等級城市的服務(wù)功能說課稿
【教學目標】知識與技能：了解我國不同等級城市的劃分，并理論聯(lián)系實際辨別現(xiàn)實社會的城市等級運用有關(guān)原理，說明不同等級城市服務(wù)范圍的差異。了解城市服務(wù)范圍與地理位置的關(guān)系。掌握不同等級城市的分布特點了解稱城市六邊形理論，并能用其解釋荷蘭圩田居民點設(shè)置問題過程與方法：通過對棗強鎮(zhèn)及上海城市等級演化分布的學習，掌握不同等級城市城市服務(wù)范圍與功能以及城市等級提高的基本條件通過對德國城市分布案例的學習，總結(jié)歸納出不同等級城市分布規(guī)律通過城市六邊形理論的學習，學會分析城市居民點布局等現(xiàn)實問題情感態(tài)度與價值觀：通過學生對我國不同等級城市（經(jīng)濟、人口、交通、服務(wù)種類）等相關(guān)資料的搜集，讓學生關(guān)心我國基本地理國情，增強熱愛祖國的情感。養(yǎng)成求真、求實的科學態(tài)度，提高地理審美情趣。
人教版新課標高中物理必修1速度變化快慢的描述─加速度說課稿2篇
本來比較速度變化的快慢也有兩種方法：一種是比較相同時間內(nèi)速度變化量的大小；另一種是比較發(fā)生相同的速度變化所需要的時間長短。但教材是將比較質(zhì)點位置移動快慢的思想直接遷移過來，通過實例分析，使學生明白不同運動物體的速度變化快慢不同，表現(xiàn)在速度的變化與發(fā)生這個變化所用時間的比值不同，從而引入加速度的定義方法a=△v/△t。加速度表示速度的變化快慢，包括速度增加的快慢和減小的快慢，不能誤認為只要有加速度的運動速度就一定是增加的。廣義地講，加速度不僅可以描述速度大小的變化快慢，而且也可以描述速度方向變化的快慢，本節(jié)教材只限定在直線運動的情景中討論。加速度的矢量性是一個難點，教材是以與速度方向相同或是相反來表述加速度的矢量性的。如果以初速度方向為正方向，那么加速度就有正負之分，加速度的正負表示加速度的方向，不表示加速度的大小。