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人教版高中生物必修2人類遺傳病說(shuō)課稿
一、人類遺傳病1．概念2．分類(1)單基因遺傳病(2)多基因遺傳病(3)染色體異常遺傳病①原因②類型3遺傳病的特點(diǎn)4．遺傳病對(duì)人類的危害八、說(shuō)布置作業(yè)在作業(yè)的布置中，我嚴(yán)格遵循“重質(zhì)量、輕負(fù)擔(dān)”的指導(dǎo)思想。第一題主要是為了幫助學(xué)生及時(shí)糾正原有的對(duì)知識(shí)的錯(cuò)誤理解或片面認(rèn)識(shí)，培養(yǎng)學(xué)生的解題技巧和技能。所以我選用了該題。同時(shí)想借助該題培養(yǎng)學(xué)生對(duì)問題的科學(xué)的思維方法和探究的精神。幫助學(xué)生提高對(duì)信息技術(shù)運(yùn)用的熟練程度，發(fā)展學(xué)生的信息素養(yǎng)。附作業(yè)：1、連線題，請(qǐng)同學(xué)們連線指出下列遺傳各屬于何種類型？（1）苯丙酮尿病 A、單基因遺傳?。?）21三體綜合征（3）抗維生素D佝僂病 B、多基因遺傳?。?）軟骨發(fā)育不全（5）青少年型糖尿病 C、常染色體病2、以生物小組為單位進(jìn)行人類遺傳病的調(diào)查。
人教版高中歷史必修3啟蒙運(yùn)動(dòng)說(shuō)課稿
教材地位本課具有承上啟下的作用，前承文藝復(fù)興，后啟資產(chǎn)階級(jí)革命時(shí)代的到來(lái)，啟蒙運(yùn)動(dòng)為資本主義社會(huì)構(gòu)建了一套政治藍(lán)圖，具有前瞻性，是近代第二次思想解放運(yùn)動(dòng)。因此，本節(jié)內(nèi)容在整個(gè)教材中有著很重要的地位。教學(xué)目標(biāo)1、知識(shí)目標(biāo)：（1）幫助學(xué)生了解啟蒙運(yùn)動(dòng)的性質(zhì)、內(nèi)容和主要啟蒙 思想家及其主張。（2）理解啟蒙運(yùn)動(dòng)興起的背景、影響。2、能力目標(biāo)：（1）在討論和探究過程中訓(xùn)練學(xué)生的科學(xué)思維方法和自主學(xué)習(xí)的能力和掌握解題的方法。（2）通過指導(dǎo)學(xué)生閱讀啟蒙思想家的言論資料，培養(yǎng)學(xué)生對(duì)歷史資料的理解和歸納能力。3、情感價(jià)值目標(biāo)：（1）培養(yǎng)人文意識(shí)，強(qiáng)化法治觀念。（2）培養(yǎng)學(xué)生的團(tuán)結(jié)協(xié)作精神和競(jìng)爭(zhēng)意識(shí)。教學(xué)重點(diǎn)、難點(diǎn)(1)教學(xué)重點(diǎn)：?jiǎn)⒚伤枷爰业闹鲝埣皢⒚蛇\(yùn)動(dòng)的影響。
人教版高中英語(yǔ)必修4Working The Land說(shuō)課稿3篇
Knowledge objectives:(1) to make Ss grasp the usage of words, expressions and sentence structures: statistics, struggle, thanks to, rid of, some patterns for persuasion, the “ing” form as subject and object;(2)to use learnt knowledge to persuade sb.Ability objectives:(1) to develop Ss’ reading skills(skimming, scanning, word guessing);(2) to improve Ss’ speaking, communicating and cooperating skills.Emotional objectives:to make Ss know the contribution of Yuan,and learn his spirit and his simple life time.Teaching important and difficult points:(1) some words, expressions and sentence structures mentioned above;(2)the content of the text;(3)training their reading and speaking skills.Teaching methods: CLT, TBLT,QT.Learning strategies: CLS, QLS, TBLS.Teaching procedures:Step 1 lead-in: (1) teacher plays a piece of recent news from CCTV about the harvest of the super hybrid rice, and ask students whether they know Yuan or not, and talk about him and his contribution.(2)Brain storm: let Ss describe Yuan in their minds including his appearance, his living condition and so on.Step 2 fast reading tasks:(1)teacher introduces Yuan and super hybrid rice(2)make Ss read the text as fast as possible with questions. Such as: what’s the general ideaof this passage? What’s Yuan’ dream? (skimming and scanning skill)Step 3 intensive reading tasks(1)let Ss read the text silently, find topic sentence of each paragraph and draw the difficult sentences and the knowledge what they don’t understand.(words guessing)(2)teacher and Ss talk about the important words, expressions and sentences together, and ask Ss to retell the content of the text.(summarizing and paraphrasing)(3)teacher summarize this part.(4) read again following the courseware.
人教版高中歷史必修2開辟新航路說(shuō)課稿3篇
一、說(shuō)教材《開辟新航路》是高中《歷史·必修二》第5課的內(nèi)容。從三個(gè)方面向?qū)W生介紹了歐洲人開辟新航路的歷史：即新航路開辟的原因和條件、新航路開辟經(jīng)過以及影響。前4課內(nèi)容介紹了古代中國(guó)經(jīng)濟(jì)的基本結(jié)構(gòu)與特點(diǎn)，從第5課開始學(xué)習(xí)資本主義世界市場(chǎng)的形成和發(fā)展。本課內(nèi)容相當(dāng)重要，上承古代中國(guó)，下啟近代世界。新航路的開辟，打破了世界相對(duì)隔絕的狀態(tài)，世界真正開始融合為一個(gè)整體。從此，以西歐為中心的世界市場(chǎng)的雛形開始出現(xiàn)。隨后的殖民擴(kuò)張，世界市場(chǎng)拓展；第一次工業(yè)革命，世界市場(chǎng)基本形成；第二次工業(yè)革命，世界市場(chǎng)發(fā)展。二、說(shuō)目標(biāo)1、課程標(biāo)準(zhǔn)概述迪亞士、哥倫布開辟新航路的史實(shí)，認(rèn)識(shí)地理大發(fā)現(xiàn)對(duì)世界市場(chǎng)形成的意義。2、三維目標(biāo)①知識(shí)與能力：掌握新航路開辟的原因、經(jīng)過、影響。②過程與方法：引導(dǎo)學(xué)生分析原因及影響，培養(yǎng)學(xué)生分析和歸納問題的能力。③情感態(tài)度與價(jià)值觀：A、通過對(duì)新航路開辟過程的學(xué)習(xí)，使學(xué)生感受和學(xué)習(xí)探險(xiǎn)家們勇于進(jìn)取的開拓精神。B、通過學(xué)習(xí)新航路開辟的影響，使學(xué)生認(rèn)識(shí)新航路開辟促進(jìn)了人類社會(huì)的整體發(fā)展。
人教版高中英語(yǔ)必修2Computers說(shuō)課稿3篇
一. 教材分析1. 本單元的中心話題是“計(jì)算機(jī)（Computers）”，內(nèi)容涉及計(jì)算機(jī)的發(fā)展歷史，計(jì)算機(jī)的應(yīng)用等。本節(jié)課是該單元的第一課時(shí)，我將Warming up, Pre-reading and Comprehending這四部分整合為一節(jié)精讀課。其中。Reading部分是題為WHO AM I？的文章，以第一人稱的擬人手法介紹了計(jì)算機(jī)發(fā)長(zhǎng)演變的歷史和計(jì)算機(jī)在各個(gè)領(lǐng)域的應(yīng)用，其主旨是表達(dá)計(jì)算機(jī)的發(fā)展變化之快以及在生活中用途之廣。而Warming up部分以圖片的形式展現(xiàn)了計(jì)算機(jī)的發(fā)展歷程；Pre-reading中的問題和排序分別是為了預(yù)測(cè)語(yǔ)篇的內(nèi)容和測(cè)試學(xué)生對(duì)計(jì)算機(jī)歷史了解的情況；Comprehending則通過各項(xiàng)練習(xí)訓(xùn)練學(xué)生的閱讀技能，從而加深對(duì)文章的理解?？梢娺@幾部分是一個(gè)有機(jī)的整體。2. 教學(xué)目標(biāo)：1) 語(yǔ)言目標(biāo)：重點(diǎn)詞匯及短語(yǔ)：abacus, calculate, calculator, PC, laptop, PDA, robot, analytical, technological, universal, mathematical, artificial, intelligent, network, explore, in common, as a result.重點(diǎn)句子：a. My real father was Alan Turing, who in 1963 wrote a book to describe how computers could be made to work, and build a “universal machine” to solve any mathematical problem.
人教版高中英語(yǔ)必修2Wildlife Protection說(shuō)課稿3篇
When it comes to the students’ studying methods, I'd like to introduce my Ss first. The Ss have a good command of basic language points. They’re interested in learning English, and they take an active part in English class, so they will have fun in autonomous, cooperative and inquiry learning. I will just serve as a guide, showing them the way to explore how to make more progress in their English learning.Now it’s time for the most important stage of this lesson. My teaching procedures are arranged as follows:Step1.Leading-in (3 minute)Play a video of a wide variety of wildlife to introduce my topic. Step2. Speaking (12 minutes)We will use our textbook Page25. Let the Ss fast read the short paragraph to warm up. Ask them to talk about the report on some endangered wildlife in China with the dialogue patterns on the screen. Lastly, I will invite some groups to demonstrate their dialogues about saving wildlife in China.Step3.English play (3 minutes)Watch another video in praise of their excellent performance just now. It’s about Jack Chen’s（成龍）and Yang Ziqiong’s wildlife protection.Step4. Listening (twice 13 minutes)This time, I’ll ask the Ss to fill in the blanks of the monologue of the 2 movie stars above. Step5.Discussion (3 minutes)Which would you like to choose to wear, clothes made of cotton, artificial leather or animal skins? Why ?Step6. Summary (3 minutes)1. If there were no wildlife, there wouldn’t exist human beings. If the buying stops, the killing can, too.2. Animals are our friends. To love animals is to love ourselves. Stop hunting, killing and destroying wildlife.3. Let’s live in harmony with all the living things in the world. Step7. Music appreciation (3 minutes)Let the Ss appreciate the song Earth Song by Michael Jackson. Last but not the least, I will show you my blackboard design.
人教版高中英語(yǔ)必修4A taste of English Humor說(shuō)課稿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
人教版高中英語(yǔ)必修3Canada-the true north說(shuō)課稿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
人教版高中英語(yǔ)必修4Theme parks說(shuō)課稿3篇
The oldest and the most popular park in the worldenjoy the exciting activities thereget close to the life-size cartoon characters like Mickey Mouse and Donald Duck Step 3 Pre-reading1.What do you suppose a theme park is ?2.What do you think you can see in a theme park?(1.It is a kind of amusement park which has a certain theme – that the whole park is based on. 2.buildings, castles, statues, rare animals and birds, and so on.) Step 4 Reading ----- Theme Parks –---- Fun and More Than Fun1.Predict : Read the title and the pictures on P. 34 and PredictWhat is the meaning of the title “Theme Park – Fun and more than fun”?(The title means that theme parks are fun to visit, but that they can also be educational and can offer useful information.)2.Skimming Fast read and answer:What activities can we take in a theme park?Amusement park: Bumper car Merry-go-round slide bungee jumping Free-fall rides Horror films Pirate ship Ferris wheel roller coaster3.Scanning Read again and you will find various theme parks are mentioned in the passage . Then what are they ?Theme parks: Sports theme park History theme park Culture theme park Marine or Ocean theme Park Future park Science theme park Disneyland4.Careful reading and find the main idea of each paragraph:THEME PARKS---- entertaining/ educationalPara.1 Traditional parks are places to go for relaxation and to have time away from our busy lives.Para.2 Theme parks are different They’re large and full of things to do, see and buy.Para.3 Theme parks are built around a single idea or theme. One example is a sports park.Para.4 Another kind of theme park is historical more and cultural and can be educational.Para.5 Disneylandwas the first theme park. It is based on the fantasy life and characters of Disney’s films.Para.6 Some examples of educational theme parks include sea world parks and science parks.
人教版高中英語(yǔ)必修3Healthy Eating說(shuō)課稿4篇
Language learning needs a context, which can help the learners to understand the language and then can product comprehensible output, so computer has the advantages to make the materials attractive.Part 3 Learning MethodsTask-based, self-dependent and cooperative learningPart 4 Teaching ProcedureStep One Lead-in“Interest is the best teacher.” Therefore, at the very beginning of the class, I should spark the students’ mind to focus on the centre topic “the band”. I’ll show some pictures of food to attract their attention and then bring some questions.Question:What kind of food they like?What should go into a good meal?The answers must relate to the diet. After this, the students will be eager to know something about a balance diet and this is the very time to naturally lead the class into Step 2Step 2 Reading for information: skimming and scanning In this step, I use Task-based Language Teaching method, which can give students a clear and specific purpose while skimming and scanning the context.Task 1 General ideaThe students will be asked to just glance at the title and the pictures of the passage, and then guess what they will read in the text. And they’ll be divided into groups of four to have a discussion.The purpose is to inspire the students to read actively, not passively. In addition, the task is to develop the students’ reading skill by making prediction and to encourage the students to express their thoughts in English and cooperate with each other.Task 2 Main idea of each paragraphCooperative learning can raise the students’ interest and create an atmosphere of achievement. Based on this theory, I divide the whole class into 4 groups to skim the whole text and get the main idea of each paragraph.
人教版新課標(biāo)高中物理必修1彈力說(shuō)課稿3篇
基于以上分析，為使本堂課圍繞重點(diǎn)、突破難點(diǎn)，同時(shí)讓學(xué)生在課堂教學(xué)中能力得到提高，我設(shè)計(jì)如下教學(xué)過程。（一）創(chuàng)設(shè)情景認(rèn)識(shí)形變由同學(xué)們已有的形變知識(shí)入手，引入新課。教師演示：①?gòu)椈傻膲嚎s形變；②彈簧的拉伸形變③視頻播放：竹竿形變、鋼絲的扭轉(zhuǎn)形變。得出形變的概念及各類形變。[設(shè)計(jì)意圖：我從生活情景中引入新課，是為了激發(fā)學(xué)生的好奇心，為學(xué)生學(xué)習(xí)重點(diǎn)和難點(diǎn)內(nèi)容作鋪墊。]設(shè)問：摩天大樓在風(fēng)的吹拂下會(huì)不會(huì)擺動(dòng)，發(fā)生形變嗎？演示微小形變放大實(shí)驗(yàn)：由于這種形變不容易觀察，會(huì)使學(xué)生產(chǎn)生疑問：到底有沒有發(fā)生形變？解決的辦法是微小形變的演示實(shí)驗(yàn)。為什么光點(diǎn)會(huì)往下移？讓學(xué)生帶著問題思考后得出結(jié)論：是由于桌面發(fā)生了形變，但是形變不明顯。為后面解決壓力和支持力都是彈力做好鋪墊。[設(shè)計(jì)意圖：使學(xué)生知道“放大”是一種科學(xué)探究的方法。]
人教版新課標(biāo)高中物理必修2向心力說(shuō)課稿3篇
通過這個(gè)示例呢，我們可以得到解決向心力問題的一般的步驟，確定對(duì)象，找出軌跡，找出圓心，然后進(jìn)行受力分析，讓同學(xué)們參考這樣的步驟，逐步的解決圓周運(yùn)動(dòng)的問題，對(duì)于變速圓周運(yùn)動(dòng)，我通過鏈球運(yùn)動(dòng)進(jìn)行引入，這里是一個(gè)鏈球運(yùn)動(dòng)的視頻，在同學(xué)們觀看視頻之前，我給同學(xué)們提出問題，鏈球收到繩子的拉力，做的是勻速圓周運(yùn)動(dòng)嗎？ 然后再課堂上我們?cè)僮鲆粋€(gè)小實(shí)驗(yàn)， 我們可以通過改變拉線的方式來(lái)調(diào)節(jié)小球的速度大小嗎？ 那么對(duì)小球，做加速圓周運(yùn)動(dòng)，進(jìn)行受力分析，我們可以看到，小球做加速運(yùn)動(dòng)時(shí)，他所受到的力，并不是嚴(yán)格通過軌跡的圓心，在進(jìn)行分析的時(shí)候，特別強(qiáng)調(diào)，小桶所受力的切線方向分力，和法線方向分力，切線方向分力，改變小球運(yùn)動(dòng)速度大小，法線方向分力，改變了小球運(yùn)動(dòng)的方向，法線方向的分力，在這里就是向心力，產(chǎn)生了向心加速度，通過這樣一個(gè)例子進(jìn)行分析，同學(xué)們是比較容易理解的，
人教版高中生物必修1細(xì)胞增殖說(shuō)課稿
f.有絲分裂的意義（討論分析教學(xué)），首先引導(dǎo)學(xué)生結(jié)合所學(xué)知識(shí)討論有絲分裂的的作用，最后有教師歸納總結(jié)，并要求學(xué)生在理解的基礎(chǔ)上記憶。g.無(wú)絲分裂（圖形直觀教學(xué)、簡(jiǎn)介），本部分內(nèi)容不是教學(xué)的重點(diǎn)，內(nèi)容也相對(duì)簡(jiǎn)單，所以我的教學(xué)方法是直接給學(xué)生展示掛圖，再進(jìn)行簡(jiǎn)短介紹，讓學(xué)生了解即可。h.引出減數(shù)分裂的概念，為第五章學(xué)習(xí)打下基礎(chǔ)。小結(jié)：新課講完以后由教師對(duì)本節(jié)內(nèi)容進(jìn)行總結(jié)鞏固和反饋：進(jìn)行一些課堂練習(xí)達(dá)到鞏固和反饋的作用。最后布置作業(yè)，各種難度的作業(yè)題目均設(shè)置一些，其中簡(jiǎn)單題比重大，難題要求學(xué)生選作，這樣提高學(xué)生學(xué)習(xí)積極性。2教學(xué)媒體程序設(shè)計(jì): 細(xì)胞周期的概念（多媒體課件演示周期動(dòng)畫）植物細(xì)胞有絲分裂（多媒體課件演示分裂各期動(dòng)畫）動(dòng)植物細(xì)胞有絲分裂異同點(diǎn)（多媒體課件演示分裂各期動(dòng)畫）有絲分裂過程中DNA和染色體數(shù)量的變化規(guī)律（掛圖演示，包括表格和函數(shù)圖象）
人教版高中生物必修2伴性遺傳說(shuō)課稿
（1觀察圖解，色盲基因在性別間是如何傳遞的呢？（女--女、女--男、男--女）（2）為什么不能由男性傳給男性？（色盲基因是在X染色體上，因此色盲基因是隨X染色體的傳遞而傳遞。）（3）男性的色盲基因怎樣才能傳給男性呢？（通過女兒，傳給外孫即交叉遺傳）（4）從圖解看色盲在男女中的發(fā)病情況怎樣？（男性多于女性）（5）從社會(huì)調(diào)查也是這樣，你是否能從基因和染色體的角度加以解釋？（提示：女性染色體的構(gòu)成，結(jié)合基因位置及顯隱性進(jìn)行分析）歸納特點(diǎn)：歸納出色盲基因遺傳的特點(diǎn)并擴(kuò)展到X染色體隱性遺傳的特點(diǎn)上。色盲基因遺傳（X隱性遺傳）的特點(diǎn)：（1）男患者多于女患者（2）交叉遺傳（3）女病兒子必病，男正女兒必正等。問題探討：利用“遺傳圖解”結(jié)合“問題鏈”繼續(xù)探討，拓展到抗維生素D即X 染色體顯性遺傳的特點(diǎn)。（6）色盲基因在X染色體上屬隱性基因，子代表現(xiàn)男多于女，對(duì)應(yīng)的正常色覺基因則屬于X顯性基因，子代表現(xiàn)應(yīng)如何？（女多于男）
人教版高中生物必修1細(xì)胞的癌變說(shuō)課稿
5．5癌癥的預(yù)防作為本節(jié)最重要內(nèi)容，且與生活息息相關(guān)，我采用老師引導(dǎo)、學(xué)生討論總結(jié)的方法進(jìn)行教學(xué)。從生活各方面總結(jié)出保健良方 ，既對(duì)知識(shí)有很好應(yīng)用，又體現(xiàn)對(duì)生命的熱愛。此時(shí)，本節(jié)課達(dá)到高潮，同學(xué)們意氣風(fēng)發(fā)，熱烈討論，實(shí)現(xiàn)本節(jié)課的教學(xué)目標(biāo)。5．6 癌癥的治療通過講述癌癥治療方法的副作用，激發(fā)學(xué)生探究生物學(xué)欲望，激勵(lì)學(xué)生立志除癌。 在此，我選用一則關(guān)于一名癌癥晚期病人運(yùn)用心理療法成功戰(zhàn)勝癌癥的故事，在于對(duì)不同層次的學(xué)生進(jìn)行多方面啟發(fā)教育，體現(xiàn)面向全體學(xué)生的課程理念。5．7 愉悅總結(jié)，及時(shí)反饋本節(jié)知識(shí)點(diǎn)零散，我將帶領(lǐng)學(xué)生回憶瀏覽本節(jié)內(nèi)容，使零散知識(shí)點(diǎn)系統(tǒng)化。在課堂反饋環(huán)節(jié)，我通過簡(jiǎn)單練習(xí)采用分組競(jìng)答的方式把握學(xué)生對(duì)知識(shí)的掌握程度，并給予表現(xiàn)突出的學(xué)生適當(dāng)獎(jiǎng)勵(lì)，這是本節(jié)課第三個(gè)亮點(diǎn)。競(jìng)答既使課堂顯得緊湊、集中，又有利于形成學(xué)生的競(jìng)爭(zhēng)意識(shí)，還使得學(xué)生的知識(shí)得以鞏固應(yīng)用。
人教版高中生物必修2DNA的復(fù)制說(shuō)課稿
設(shè)問：DNA復(fù)制后兩個(gè)子代DNA分子與親代DNA分子是否完全相同？為什么？通過設(shè)問，讓學(xué)生進(jìn)一步理解和鞏固DNA復(fù)制的全過程。接下來(lái)讓學(xué)生總結(jié)出DNA復(fù)制的四大基本條件：① 模板：開始解旋的DNA分子的兩條單鏈；② 原料：是游離在核液中的脫氧核苷酸；③ 能量：是通過水解ATP提供；④ 酶：酶是指一個(gè)酶系統(tǒng)，不僅僅是指一種解旋酶。最后通過以上分析，總結(jié)出DNA復(fù)制的意義以及在生活中的應(yīng)用：意義：DNA通過復(fù)制，使遺傳信息從親代傳給子代，從而保證了物種的相對(duì)穩(wěn)定性，保持了遺傳信息的連續(xù)性，使物種得以延續(xù)。應(yīng)用：目前DNA分子廣泛應(yīng)用于刑事案件偵破等方面：如：DNA分子是親子鑒定的主要證據(jù)之一。把案犯在現(xiàn)場(chǎng)留下的毛發(fā)、血等進(jìn)行分析作為破案的證據(jù)，與DNA有關(guān)。五、設(shè)計(jì)課堂練習(xí)：設(shè)計(jì)一題典型課堂練習(xí)：即有關(guān)半保留復(fù)制及計(jì)算的習(xí)題：
人教版高中生物必修1細(xì)胞的衰老與凋亡說(shuō)課稿
4、最后從生物的壽命引入，探討細(xì)胞的死亡。強(qiáng)調(diào)細(xì)胞死亡有兩種形式。(1).細(xì)胞壞死，它是由某些外界因素造成細(xì)胞急速死亡，是一種被動(dòng)性死亡；(2).細(xì)胞凋亡，這是一種由特定基因控制的主動(dòng)性死亡。細(xì)胞壞死與細(xì)胞凋亡在形態(tài)學(xué)和生物化學(xué)上有著明顯的區(qū)別。細(xì)胞凋亡有廣泛的生物學(xué)意義，比如胚胎發(fā)育期手的發(fā)育如果沒有細(xì)胞的調(diào)亡就不會(huì)有纖細(xì)的手指；如果沒有正常的細(xì)胞調(diào)亡，蝌蚪的尾部就不會(huì)消失，它將永遠(yuǎn)不能變成青蛙……。正常的細(xì)胞調(diào)亡還肩負(fù)著維持各種組織器官固有體積和形態(tài)的功能；還會(huì)使機(jī)體內(nèi)異常的細(xì)胞得到及時(shí)清除，去處潛在的隱患；例如癌癥就是異常的細(xì)胞沒有及時(shí)死亡的結(jié)果……。因此細(xì)胞的正常死亡是生物體的一種非常重要的調(diào)節(jié)機(jī)制，是機(jī)體平衡細(xì)胞增殖，調(diào)節(jié)機(jī)體細(xì)胞樹木恒定的方式，是必不可少的生命過程。（15分鐘）5、課堂小結(jié)，可以把課堂傳授的知識(shí)盡快地轉(zhuǎn)化為學(xué)生的素質(zhì)；簡(jiǎn)單扼要的課堂小結(jié)，可使學(xué)生更深刻地理解政治理論在實(shí)際生活中的應(yīng)用，并且逐漸地培養(yǎng)學(xué)生具有良好的個(gè)性。
人教版高中生物必修2遺傳密碼的破譯說(shuō)課稿
3、遺傳密碼的特點(diǎn) 連續(xù)性、簡(jiǎn)并性、通用性5、課堂練習(xí)6、作業(yè)布置假如，我們利用(ACU)n核苷酸長(zhǎng)鏈合成了含有蘇氨酸的多肽，那么蘇氨酸可能的密碼子有哪些？如何運(yùn)用實(shí)驗(yàn)方法確證蘇氨酸的密碼子究竟是什么？七、教學(xué)反思1、教材中豐富的科學(xué)史料，是我們?cè)谡n堂上進(jìn)行探究性學(xué)習(xí)活動(dòng)的良好素材，教師要整理和運(yùn)用好。千萬(wàn)不要低估學(xué)生的思維能力，當(dāng)學(xué)生的思維能力被你想方設(shè)法激發(fā)出來(lái)的時(shí)候，你會(huì)發(fā)現(xiàn)他們的創(chuàng)造力是無(wú)窮的。2、探究性學(xué)習(xí)的目的并不僅僅是問題的解決，更重要的是在探究過程中體驗(yàn)和獲取科學(xué)研究方法，培養(yǎng)合作與分享的精神以及實(shí)事求是的科學(xué)態(tài)度，鍛煉思維能力，提高科學(xué)素養(yǎng)。3、學(xué)生是學(xué)習(xí)的主體，教師是引導(dǎo)者。我們要采取措施讓學(xué)生積極主動(dòng)地參與到學(xué)習(xí)活動(dòng)中來(lái)，通過他們的思考、討論、爭(zhēng)辯、合作等活動(dòng)來(lái)獲取方法，建構(gòu)知識(shí)。
人教版高中生物必修2染色體變異說(shuō)課稿
四、說(shuō)教學(xué)程序（一）.溫故知新、導(dǎo)入新課復(fù)習(xí)提問:基因突變導(dǎo)致生物變異的原因是什么?回答:基因突變是基因結(jié)構(gòu)發(fā)生改變，從而使遺傳信息改變，使蛋白質(zhì)結(jié)構(gòu)改變、生物性狀改變，即生物發(fā)生了變異。那么，基因是什么?它和染色體又有何關(guān)系?回答:基因是有遺傳效應(yīng)的DNA片斷，染色體是DNA的載體，基因在染色體上呈線形排列。引出新知:對(duì)于一個(gè)生物體來(lái)說(shuō)，正常情況下，其染色體的結(jié)構(gòu)和數(shù)量都是穩(wěn)定的。但在自然條件或人為因素的影響下，染色體的結(jié)構(gòu)和數(shù)量均會(huì)發(fā)生改變，從而導(dǎo)致生物性狀的改變，這就屬于染色體變異。（二）.把握重點(diǎn)、突破難點(diǎn)重點(diǎn)的把握：1、染色體結(jié)構(gòu)的變異播放影片:貓叫綜合征幼兒。讓學(xué)生觀察: 患兒哭聲輕、音調(diào)高，很像貓叫。教師補(bǔ)充: 患兒的征狀---兩眼較低、耳位低下，存在著嚴(yán)重的智力障礙。闡述病因---染色體片段缺失
人教版高中語(yǔ)文必修2《囚綠記》說(shuō)課稿2篇
“深入探究，把握主旨”這一步則是解決教學(xué)的重點(diǎn)難點(diǎn)，這里涉及到課文的深層意蘊(yùn)，學(xué)生理解有難度，教師在通過問題引領(lǐng)學(xué)生探討的基礎(chǔ)上，還要適時(shí)啟發(fā)、點(diǎn)撥，因?yàn)榻虒W(xué)時(shí)間有限，讓學(xué)生漫無(wú)邊際的討論，可能難以完成預(yù)定的教學(xué)任務(wù)，會(huì)使教學(xué)過程不完整。至于本文的寫作特點(diǎn)的教學(xué)視時(shí)間而定，有時(shí)間可以讓學(xué)生說(shuō)一說(shuō)，沒有時(shí)間用小黑板出示一下，讓學(xué)生了解就行，如果時(shí)間不夠，甚至可以不講。第三階段是“延伸練習(xí)，鞏固提高”。
