【正文】 s m/s m/s m/s 4．歸納總結(jié)最后，再通過提問的方式引導(dǎo)學(xué)生把本節(jié)所學(xué)的主要內(nèi)容進(jìn)行歸納和總結(jié)，讓學(xué)生養(yǎng)成先學(xué)習(xí)后總結(jié)的良好習(xí)慣，并培養(yǎng)、鍛煉學(xué)生的語言表達(dá)能力。學(xué)法：觀察實(shí)驗(yàn)討論、對(duì)比歸納、練習(xí)提高25本節(jié)課的教學(xué)過程是在教師的分析點(diǎn)撥和幫助下學(xué)生進(jìn)行觀察實(shí)驗(yàn)為主，老師的提問分析為輔進(jìn)行的。其次，在教學(xué)過程中，要注意尊重學(xué)生的“主體”地位，盡量讓學(xué)生去想、去說、去做、去練。它在電學(xué)實(shí)驗(yàn)占重要地位，學(xué)好變阻器，即有助于學(xué)生更好地理解電阻的概念，又為今后的學(xué)習(xí)特別是做電學(xué)實(shí)驗(yàn)必要的準(zhǔn)備。情感態(tài)度與價(jià)值觀通過探究活動(dòng)，體驗(yàn)探究的樂趣，使學(xué)生樂于觀察、實(shí)驗(yàn)，培養(yǎng)學(xué)生團(tuán)隊(duì)合作與交流的能力。二、教材教法根據(jù)新課程基本理念“注重科學(xué)探究，提倡學(xué)習(xí)方式多樣化”，在本節(jié)課教學(xué)中，我們提出“提出問題──實(shí)驗(yàn)探究──交流評(píng)價(jià)”物理課堂教學(xué)模式，它是在教師的引導(dǎo)下，學(xué)生根據(jù)已有的知識(shí)和對(duì)身邊物理現(xiàn)象的已有觀察、對(duì)生產(chǎn)技術(shù)的已有感性認(rèn)識(shí)27發(fā)現(xiàn)問題，提出假設(shè)和猜想，進(jìn)而自行設(shè)計(jì)實(shí)驗(yàn)、驗(yàn)證假設(shè)、交流評(píng)價(jià)最后歸納出物理概念和規(guī)律的一系列教學(xué)活動(dòng)，從而使學(xué)生把科學(xué)知識(shí)的獲得與思維能力的培養(yǎng)有機(jī)的結(jié)合起來，主動(dòng)獲得對(duì)科學(xué)的理解，達(dá)到獲取物理知識(shí)、培養(yǎng)創(chuàng)造能力和實(shí)踐能力的一種探究性教學(xué)模式。）（二）變阻器原理的學(xué)習(xí)：（約16分鐘）提出問題 教師引導(dǎo)：燈泡亮度的變化是由通過的電流引起的，而電流的變化則是由電阻的變化引起的。28方案三（改變長(zhǎng)度）：如圖所示，在A、B間（有鄂魚夾）夾入一段鉛筆芯，使一端在鉛筆芯上自由滑動(dòng)，通過改變接入電路中鉛筆芯的長(zhǎng)度來改變接入電路中的電阻，觀察并記錄小燈泡的亮度變化，并加以比較。要想弄清其原理，我們先來學(xué)習(xí)一種能改變電阻的器件──變阻器。然后打出投影：電阻絲什么位置的絕緣漆被刮去了？為什么要刮去？ 哪兩個(gè)接線柱之間的電阻是不變的？ 哪兩個(gè)接線柱之間的電阻很小，幾乎是零？教師結(jié)合投影片介紹其構(gòu)造，理解銘牌上數(shù)據(jù)的物理意義；并要求學(xué)生學(xué)會(huì)畫滑動(dòng)變阻器的結(jié)構(gòu)簡(jiǎn)圖和電路符號(hào)。同時(shí)，教師巡視，并指導(dǎo)各實(shí)驗(yàn)小組將變阻器的實(shí)物連接、電路圖連接、及電路符號(hào)連接進(jìn)行對(duì)照，研究電阻變化的原理和規(guī)律。”）四、板書板書將教學(xué)內(nèi)容系統(tǒng)化、條理化，使學(xué)生易于掌握知識(shí)的重點(diǎn)、分散教學(xué)難點(diǎn)，加深對(duì)基本概念和規(guī)律的認(rèn)識(shí)，便于學(xué)生筆記和復(fù)習(xí)，易于在學(xué)生大腦中留下深刻的印象。30③滑片越靠近下端的接線柱，接入電路的電阻越小《電磁感應(yīng)現(xiàn)象》—說課試講考試復(fù)習(xí)資料一、說教材 奧斯特的發(fā)現(xiàn)說明了電能產(chǎn)生磁，而法拉第的發(fā)現(xiàn)說明了磁能產(chǎn)生電，從另一角度揭示了磁和電之間的聯(lián)系，使電能的大規(guī)模利用成為可能，為發(fā)電機(jī)的制造和應(yīng)用奠定了基礎(chǔ)，因此這一章是本章的教學(xué)重點(diǎn)之一。關(guān)鍵：本節(jié)的教學(xué)關(guān)鍵是指導(dǎo)學(xué)生邊學(xué)邊試驗(yàn)，探究電磁感應(yīng)現(xiàn)象及其規(guī)律 （1）知識(shí)目標(biāo)：知道電磁感應(yīng)現(xiàn)象及其產(chǎn)生的條件；知道動(dòng)卷式話筒的和發(fā)電機(jī)的結(jié)構(gòu)原理。三、說學(xué)法、討論、答疑、設(shè)計(jì)試驗(yàn)方案，培養(yǎng)學(xué)生積極思維，激發(fā)學(xué)習(xí)興趣，提高自信心，培養(yǎng)頑強(qiáng)意志，建立良好的學(xué)習(xí)習(xí)慣四、說手段利用多媒體或投影儀學(xué)習(xí)提綱，歸納實(shí)驗(yàn)結(jié)論，討論練習(xí)。第一階段：研究磁場(chǎng)產(chǎn)生電流的條件 提出問題：如何做實(shí)驗(yàn)?其步驟又怎樣？引導(dǎo)學(xué)生做如下設(shè)想：電能生礠，反過來，我們把導(dǎo)體放在磁場(chǎng)里觀察是否產(chǎn)生電流，那么導(dǎo)體應(yīng)怎樣放在磁場(chǎng)中呢？導(dǎo)體在磁場(chǎng)中是靜止？還是運(yùn)動(dòng)？怎樣運(yùn)動(dòng)？（1）投影學(xué)習(xí)提綱按課本圖14—41裝置，利用矩形線圈的一條邊作為直導(dǎo)體做如下實(shí)驗(yàn)： ，讓導(dǎo)體在蹄形永久磁鐵中不動(dòng)；讓導(dǎo)體在磁場(chǎng)中上下移動(dòng)；讓導(dǎo)體在磁場(chǎng)中前后左右移動(dòng)；觀察電流表的指針偏轉(zhuǎn)情況，并做記錄。首先我們來進(jìn)行教材分析。本節(jié)課是在學(xué)習(xí)______的基礎(chǔ)上，進(jìn)一步學(xué)習(xí)___________的關(guān)鍵。教學(xué)目標(biāo)： 知識(shí)目標(biāo)：能力目標(biāo)；通過講練結(jié)合，培養(yǎng)學(xué)生處理____、解決問題的能力。通過發(fā)現(xiàn)問題、解決問題的過程，培養(yǎng)學(xué)生合作精神，增強(qiáng)學(xué)生的求知欲和對(duì)學(xué)習(xí)計(jì)算機(jī)的熱情。采用類比法，引導(dǎo)學(xué)生發(fā)現(xiàn)問題，自主學(xué)習(xí)，從而體驗(yàn)到獨(dú)立獲取知識(shí)的喜悅感。根據(jù)時(shí)間自行安排?！弊詈笪覀冋f一下本節(jié)課的教學(xué)過程。用約20分鐘時(shí)間進(jìn)行正體部分。（關(guān)于講練結(jié)合，如果是理論課，練就表示做習(xí)題，如果是操作課，就表示上機(jī)實(shí)際操作（我是按一節(jié)課40分鐘分配，待考證。但是，不要板書，浪費(fèi)時(shí)間。如果覺得整節(jié)課講不完，你可以說我今天主要講____幾部分。其中，最好有一、兩分鐘要有點(diǎn)“激情”，帶有藝術(shù)性（有限度的、和教學(xué)內(nèi)容相關(guān)聯(lián)的表演和夸張），這是得分點(diǎn)。⑵三、教學(xué)語言是必備的教學(xué)基本功之一，⑴普通話要盡可能標(biāo)準(zhǔn)些；⑵聲音要洪亮，但是不能喊。語文教師要求更高，咬字清晰，語音悅耳，抑揚(yáng)頓挫。行為舉止大方，不拘禁，也不能太囂張，要給人留下穩(wěn)重端莊的印象。最好能采用多媒體教學(xué)（試講時(shí)不允許“真實(shí)呈現(xiàn)”，技巧上可以用自己的語言“具體形象”的復(fù)述出來），這通常是可以加分的，也能體現(xiàn)新課程的理念。點(diǎn)到即可，除非特別自信，不要過于展開。如果你是女孩子，可以化點(diǎn)淡妝，但千萬不要濃妝艷抹。這樣會(huì)讓評(píng)委感覺你很有“料”，能夠把握最新進(jìn)展，能夠理論聯(lián)系實(shí)際！試講之前一定要默練。這是試講者共有的一個(gè)不足。在回答問題的時(shí)候，一定要保持面帶微笑，這種微笑會(huì)讓你省去很多麻煩的?；?dòng)：適當(dāng)和聽者互動(dòng)，提問等方式，試講時(shí)可“自問自答”。(2)配合教學(xué)內(nèi)容適當(dāng)?shù)陌鍟?。Teaching Plan Teaching Aims: aim: let students master the useful word and expressions in the reading aim: let the students learn how to municate with other persons in a more polite the reading skills of skim and aim: let the students to know the importance of respecting other people and municate with other people in a good Procedures:Step one: leadin(5 minutes)Show the students some pictures about the vehicles such as bike, taxi, and airplane and let them match the names with the two: new words and phrases(10 minutes)Write the new words and expressions from the reading material such as taxi, airport and let the students read after the three: whilereading(20 minutes)Ask the students about the main idea about the text through a quick reading about the whole the students do “T” or “F” the students conclude the main idea about each Four: consolidation(9 minutes)Divide the whole class into two a team leader of each the group one act the whole scenario based on the reading material let group two have some adaptations of the scenario based on the reading Five: Homework(1 minutes)Let the students to write a position about the ending of this morning, class, in the previous class, we have learned a reading text about the manner and ways of munication, do you still remember? And in this class, we are going to learn another text about manner and ways of munication as well as some names of vehicles in the reading of all, I’d like you do the match exercise on the you can see that, on the left part of this blackboard, there are some names of automobiles, and on the right part of the blackboard, there are some you match the names on the left with the pictures on the can have a try? OK, Mike, tell me your , your answer is right, this can be matched with this picture, and this name represents the taxi, and this is a picture about a good,class, you have done a very good ，I will read this text for you, please listen carefully, and try to get the main idea about the reading , after I read this text, I’d show you some new words and expressions in the reading first word is “taxi”(在黑板上板書寫上這個(gè)單詞)，this word means “出租車” in the second word is “airport” , before I tell you the meaning of this word, can you guess the meaning of this word? Class, who can have a try? We can bine what we have learned with what we are going to learn will give you some hints, we say “by air” in English which means “乘飛機(jī)”，and “air” is related with “飛機(jī)”，and “port” is a place where we park a ship or other , class, after you have understood these, can anyone tell me the Chinese meaning of this word? Maria, please, Yes, very means “飛機(jī)場(chǎng)” in , since you have mastered the new words and expressions in the reading material, I will give you 2 minutes to read this whole text, and then I will check whether you understand it or not, now let’s is up, now, class, please listen to my statements carefully and judge whether it is true or , the first statement is that “one day, a woman called the taxi pany to get a taxi to get him to go to the airport”, who can tell me whether this statement is right or wrong? Yes, great, Mike did a very good statement is wrong, a man rather than a woman called the taxi pany to get a taxi for , I will give my second statement, “ the man called the taxi pany three times”, class, whether this statement is true or false? OK, Julia, yes, you are right, this is two have done very , please listen to my final statement, “the man is a pilot”, who can tell me whether this statement is true or , Joe, your answer is “?”, I am afraid, you do not understand the whole text the man is a pilot in this I draw