《不倒熊貓》教學(xué)設(shè)計(jì)

1、不倒熊貓教學(xué)設(shè)計(jì)教學(xué)目標(biāo)：1. 認(rèn)識(shí)不倒熊貓不倒的兩個(gè)原因；2. 訓(xùn)練用觀察實(shí)驗(yàn)法解決問(wèn)題的能力；進(jìn)行認(rèn)識(shí)程序教學(xué)，實(shí)行會(huì)學(xué)習(xí)教育；3. 滲透磨練意志教育，培養(yǎng)學(xué)生的良好心態(tài)。教學(xué)重點(diǎn)：指導(dǎo)學(xué)生研究為什么不倒熊貓扳倒后還會(huì)自己站起來(lái)。教學(xué)難點(diǎn)：發(fā)現(xiàn)物體平衡是否穩(wěn)定與重心及支撐面的關(guān)系。評(píng)析：教學(xué)總體意識(shí)體現(xiàn)了面向社會(huì)、發(fā)展學(xué)力注、培養(yǎng)品格的教育思想。重點(diǎn)明確，難點(diǎn)清楚。目的，既包括了文化科學(xué)素質(zhì)內(nèi)容，也包括了心理素質(zhì)內(nèi)容。注學(xué)力：指知識(shí)、技能、理解，也包括興趣、動(dòng)機(jī)、態(tài)度、思考力、判斷力、表現(xiàn)力、創(chuàng)造力等。教學(xué)過(guò)程一、組織學(xué)生發(fā)現(xiàn)：不倒熊貓的穩(wěn)定性與眾不同。1.演示：出示不倒熊貓，扳動(dòng)不倒熊貓

2、。（教師動(dòng)作夸張些，以吸引學(xué)生的注意力。）2.提問(wèn)：這個(gè)玩具什么地方與眾不同？（語(yǔ)氣慢些，注意重音，講話前后都停頓幾秒鐘。）3.活動(dòng)：讓學(xué)生試一試、想一想，不倒熊貓什么地方特別？（全體學(xué)生都要參與、親自體驗(yàn)。）4.學(xué)生匯報(bào)各自的見(jiàn)解。（只要是有關(guān)不倒熊貓與眾不同的看法，不管是形式的還是本質(zhì)的，教師都應(yīng)給予肯定。錯(cuò)誤也是思維的結(jié)果。結(jié)論并不重要，最重要的是讓學(xué)生參與并思維。）評(píng)析：發(fā)現(xiàn)問(wèn)題是認(rèn)識(shí)事物的第一步驟。讓學(xué)生會(huì)發(fā)現(xiàn)問(wèn)題，是教給學(xué)生認(rèn)識(shí)事物方法的需要。5.講述：同學(xué)們提出的問(wèn)題真多，說(shuō)明你們很聰明，愛(ài)動(dòng)腦想問(wèn)題。其實(shí)老師從你們所提出的問(wèn)題中已經(jīng)明白了，你們還想知道不倒熊貓為什么扳不倒，對(duì)嗎

3、？這是個(gè)秘密（用神秘的語(yǔ)氣），今天我們就來(lái)研究這個(gè)秘密。二、指導(dǎo)學(xué)生發(fā)現(xiàn)：不倒熊貓的穩(wěn)定性與眾不同的兩個(gè)原因。觀察分析不倒熊貓的內(nèi)部構(gòu)造，得出上輕下重是不倒熊貓不倒的一個(gè)原因。（1）提出問(wèn)題：不倒熊貓的秘密在哪里呢？讓我們先來(lái)猜一猜好嗎？評(píng)析：猜想即設(shè)想，解決問(wèn)題首先要有設(shè)想。自然課中把這種創(chuàng)造思維活動(dòng)納入教學(xué)是培養(yǎng)學(xué)生良好思維品質(zhì)的需要。（2）討論：不倒熊貓與眾不同的原因可能是什么？（鼓勵(lì)學(xué)生談自己的猜測(cè)，使學(xué)生通過(guò)發(fā)言享受思維的樂(lè)趣。）（3）點(diǎn)撥：從同學(xué)們的猜想中，老師知道了大多數(shù)同學(xué)都能在不倒熊貓的內(nèi)部構(gòu)造上尋找不倒熊貓扳不倒的秘密。那么你們的猜想對(duì)不對(duì)呢？大家一起想辦法驗(yàn)證一下。（4）

4、學(xué)生講述各自想到的驗(yàn)證方法。（鼓勵(lì)學(xué)生異想天開(kāi)。）最后得出拆開(kāi)不倒熊貓進(jìn)行觀察實(shí)驗(yàn)是最好的驗(yàn)證方法。（5）組織學(xué)生觀察。讓學(xué)生拆開(kāi)不倒熊貓看里面的構(gòu)造，發(fā)現(xiàn)里面放置的橡皮泥。（6）討論：不倒熊貓扳不倒與放置橡皮泥是否有關(guān)？（7）學(xué)生實(shí)驗(yàn)、觀察并互相研究：放與不放橡皮泥，不倒熊貓有什么不同？放置位置不一樣，不倒熊貓有什么不同？評(píng)析：組織學(xué)生猜想、觀察、討論、實(shí)驗(yàn)，讓學(xué)生參與認(rèn)知全過(guò)程，重視學(xué)生的行為體驗(yàn)，對(duì)學(xué)生施行會(huì)學(xué)習(xí)教育。（8）歸納：在不倒熊貓底部放橡皮泥，就增加了不倒熊貓下部的重量，使不倒熊貓的重量分布不均，“上輕下重”是不倒熊貓不倒的一個(gè)原因。（9）對(duì)話：師：“上輕下重”這個(gè)結(jié)論我們是怎

5、么得出來(lái)的呀？生：是拆開(kāi)看出來(lái)的。師：對(duì)！不拆開(kāi)看不行。還有呢？生：是試了幾次之后得出的。師：這個(gè)“試”科學(xué)上叫實(shí)驗(yàn)。觀察實(shí)驗(yàn)是認(rèn)識(shí)事物的重要方法，科學(xué)家也是通過(guò)這樣的方法研究問(wèn)題的。評(píng)析：對(duì)于低年級(jí)學(xué)生，既教其知識(shí)，也要循序漸進(jìn)地教給他們學(xué)習(xí)方法。2.觀察分析不倒熊貓的外部構(gòu)造，得出半球形底面也是不倒熊貓不倒的一個(gè)原因。（過(guò)程略）三、鞏固練習(xí)1.說(shuō)說(shuō)一些物體不容易倒的原因。2.說(shuō)說(shuō)我們是用什么方法學(xué)習(xí)這一課的。（先通過(guò)活動(dòng)發(fā)現(xiàn)不倒熊貓有什么與眾不同之處，然后猜想不倒熊貓不倒的原因，最后由觀察實(shí)驗(yàn)得出結(jié)論。）3.出示投影片，聽(tīng)配樂(lè)故事。我是一個(gè)不倒熊貓，聽(tīng)說(shuō)小朋友們都很喜歡我。因?yàn)槲业膶?duì)手無(wú)論

6、用多么大的勁扳我，也不會(huì)把我扳倒。告訴你吧，我的身體有兩個(gè)秘密。一個(gè)是在制作我時(shí)，工人叔叔把一個(gè)很重的東西放在我肚子的最底處，使重量集中在我肚子里最低的位置；再就是我圓溜溜的大肚皮像皮球似的，無(wú)論你用多大勁扳我，都能使我肚皮里的重物作用在我的大肚皮上。這就是你扳不倒我的兩個(gè)秘密，現(xiàn)在我都告訴你了，你一定要記住哦！希望今后我們做個(gè)好朋友。四、課后作業(yè)1.準(zhǔn)備下一節(jié)課制作不倒熊貓的材料。2.運(yùn)用本節(jié)課所學(xué)的知識(shí)搞一個(gè)小發(fā)明、小制作。ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2oh

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