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      歡迎來到原中小學教育資源網!

      必修二數學課件

      課件 時間:2017-09-18 我要投稿
      【www.51cxty.com - 課件】

        必修二數學課件怎么設計?許多人并不是很清楚了解,以下是小編整理的相關范文,歡迎閱讀。

        一、教學目標

        1.知識與技能

        (1)通過實物操作,增強學生的直觀感知。

        (2)能根據幾何 結構特征對空間物體進行分類。

        (3)會用語言概述棱柱、棱錐、圓柱、圓錐、棱臺、圓臺、球的結構特征。

        (4)會表示有關于幾何體 以及柱、錐、臺的分類。

        2.過程與方法

        (1)讓學生通過直觀感受空間物體,從實物中概括出柱、錐、臺、球的幾何結構特征。

        (2)讓學生觀察、討論、歸納、概括所學的知識。

        3.情感態度與價值觀

        (1)使學生感受空間幾何體存在于現實生活周圍,增強學生學習的積極性,同時提高學生的觀察能力。

        (2)培養學生的空間想象能力和抽象括能力。

        二、教學重點、難點

        重點:讓學生感受大量空間實物及模型、概括出柱、錐、臺、球的結構特征。

        難點:柱、錐、臺、球的結構特征的概括。

        三、教學用具

        (1)學法:觀察、思考、交流、討論、 概括。

        (2)實物模型、投影儀

        四、教學思路

        (一)創設情景,揭示課題

        1.教師提出問 題:在我們生活周圍中有不少有特色的建筑物,你能舉出一些例子嗎?這些建筑的幾何結構特征如何?引導學生回憶,舉例和相互交流。教師對學生的活動及時給予評價。

        2.所舉的建筑物基本上都是由這些幾何體組合而成的,(展示具有柱、錐、臺、球結構特征的空間物體),你能通過觀察。根據某種標準對這些空間物體進行分類嗎?這是我們所要學習的內容。

        (二)、研探新知

        1.引導學生觀察物體、思考、交流、討論,對物體進行分類,分辯棱柱、圓柱、棱錐。

        2.觀察棱柱的幾何物件以及投影出棱柱的圖片,它們各自的特點是什么?它們的共同特點是什么?

        3.組織學生分組討論,每小組選出一名同學發表本組討論結果。在此基礎上得出棱柱的主要結構特征。(1)有兩個面互相平行;(2)其余各面都是平行四邊形;(3)每相鄰兩上四邊形的公共邊互相平行。概括出棱柱的概念。

        4.教師與學生結合圖形共同得出棱柱相關概念以及棱柱的表示。

        5.提出問題:各種這樣 的棱柱,主 要有什 么不同?可不可以根據不同對棱柱分類?

        請列舉身邊具有已學過的幾何結構特征的物體,并說出組成這些物體的幾何結構特征?它們由哪些 基本幾何體組成的?

        6.以類似的方法,讓學生思考 、討論、概括出棱錐、棱臺的結構特征,并得出相關的概念,分類以及表 示。

        7.讓學生觀察圓柱,并實物模型演示,如何得到圓柱,從而概括出圓標的概念以及相關的概念及圓柱的表示。

        8.引導學生以類似的方法思考圓錐、圓臺、球的結構特征,以及相關概念和表示,借助實物模型演示引導學生思考、討論、概括。

        9.教師指出圓柱和棱柱統稱為柱體,棱臺與圓臺統稱為臺體,圓錐與棱錐統稱為錐體。

        10.現實世界中,我們看 到的物體大多由具有柱、錐、臺、球等幾何結構特征的物體組合而成。請列舉身邊具有已學過的幾何結構特征的物體,并說出組成這些物體的幾何結構特征?它們由哪些基本幾何體組成的?

        (三)質疑答辯,排難解惑,發展思維,教師提出問題,讓學生思考。

        1.有兩個面互相平行,其余后面都是平行四邊形的幾何體是不是棱柱(舉反例說明,如圖)

        2.棱柱的何兩個平面都可以作為棱柱的底面嗎?

        3.課本P8,習題1.1 A組第1題。

        4.圓柱可以由矩形旋轉得到,圓錐可以由直角三角形旋轉得到,圓臺可以由什么圖形旋轉得到?如何旋轉?

        5.棱臺與棱柱、棱 錐有什么關系?圓臺與圓柱、圓錐呢?

        五、鞏固深化

        練習:課本P7 練習1、2(1)(2)

        課本P8 習題1.1 第2、3、4題

        六、歸納整理

        由學生整理學習了哪些內容

        七、布置作業

        課本P8 練習題1.1 B組第1題

        課外練習 課本P8 習題1.1 B組第2題

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