《不倒熊貓》教學(xué)設(shè)計

1、不倒熊貓教學(xué)設(shè)計教學(xué)目標(biāo)：1. 認(rèn)識不倒熊貓不倒的兩個原因；2. 訓(xùn)練用觀察實驗法解決問題的能力；進(jìn)行認(rèn)識程序教學(xué)，實行會學(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：指導(dǎo)學(xué)生研究為什么不倒熊貓扳倒后還會自己站起來。教學(xué)難點：發(fā)現(xiàn)物體平衡是否穩(wěn)定與重心及支撐面的關(guān)系。評析：教學(xué)總體意識體現(xiàn)了面向社會、發(fā)展學(xué)力注、培養(yǎng)品格的教育思想。重點明確，難點清楚。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、技能、理解，也包括興趣、動機(jī)、態(tài)度、思考力、判斷力、表現(xiàn)力、創(chuàng)造力等。教學(xué)過程一、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，扳動不倒熊貓

2、。（教師動作夸張些，以吸引學(xué)生的注意力。）2.提問：這個玩具什么地方與眾不同？（語氣慢些，注意重音，講話前后都停頓幾秒鐘。）3.活動：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。）4.學(xué)生匯報各自的見解。（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。）評析：發(fā)現(xiàn)問題是認(rèn)識事物的第一步驟。讓學(xué)生會發(fā)現(xiàn)問題，是教給學(xué)生認(rèn)識事物方法的需要。5.講述：同學(xué)們提出的問題真多，說明你們很聰明，愛動腦想問題。其實老師從你們所提出的問題中已經(jīng)明白了，你們還想知道不倒熊貓為什么扳不倒，對嗎

3、？這是個秘密（用神秘的語氣），今天我們就來研究這個秘密。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原因。（1）提出問題：不倒熊貓的秘密在哪里呢？讓我們先來猜一猜好嗎？評析：猜想即設(shè)想，解決問題首先要有設(shè)想。自然課中把這種創(chuàng)造思維活動納入教學(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？（鼓勵學(xué)生談自己的猜測，使學(xué)生通過發(fā)言享受思維的樂趣。）（3）點撥：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。那么你們的猜想對不對呢？大家一起想辦法驗證一下。（4）

4、學(xué)生講述各自想到的驗證方法。（鼓勵學(xué)生異想天開。）最后得出拆開不倒熊貓進(jìn)行觀察實驗是最好的驗證方法。（5）組織學(xué)生觀察。讓學(xué)生拆開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)生實驗、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？評析：組織學(xué)生猜想、觀察、討論、實驗，讓學(xué)生參與認(rèn)知全過程，重視學(xué)生的行為體驗，對學(xué)生施行會學(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原因。（9）對話：師：“上輕下重”這個結(jié)論我們是怎

5、么得出來的呀？生：是拆開看出來的。師：對！不拆開看不行。還有呢？生：是試了幾次之后得出的。師：這個“試”科學(xué)上叫實驗。觀察實驗是認(rèn)識事物的重要方法，科學(xué)家也是通過這樣的方法研究問題的。評析：對于低年級學(xué)生，既教其知識，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原因。（過程略）三、鞏固練習(xí)1.說說一些物體不容易倒的原因。2.說說我們是用什么方法學(xué)習(xí)這一課的。（先通過活動發(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，最后由觀察實驗得出結(jié)論。）3.出示投影片，聽配樂故事。我是一個不倒熊貓，聽說小朋友們都很喜歡我。因為我的對手無論

6、用多么大的勁扳我，也不會把我扳倒。告訴你吧，我的身體有兩個秘密。一個是在制作我時，工人叔叔把一個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)的知識搞一個小發(fā)明、小制作。ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2oh

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18、ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkaggeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxq

19、a7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawger4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i

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