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        一堂有效教學的“盛宴” ——全縣小學數學課堂教學競賽觀感    發布時間:2019-08-12 23:33:15
        一堂有效教學的“盛宴”
        ——全縣小學數學課堂教學競賽觀感
        我有幸到現場聆聽了全縣小學數學課堂教學競賽的實況,收益良多。這次高端的競賽課題是《統計——分段整理數據》(四上)。上課的四位老師“八仙過海,各顯神通”,向我們展示了一節節匠心獨運、高潮迭起、精彩紛呈的優質課。課堂上老師特別關注學生學習的實效,以充足的時間、開放的空間,讓每個學生主動進行觀察、操作、交流,扎扎實實“經歷數學學習的過程”,同時,教師也關注學生的學習興趣的培養,通過一個個教學細節,合理而有序地展示學習內容,讓學生積極地探索新知,把情感、態度、價值觀的目標落到了實處。
        縱觀全場,射陽縣雙語小學高強蘭老師執教的《統計》一課,給每個聽課的老師都留下了深刻的印象。高老師用她獨有的教學視角,精心設計了流暢的教學過程,細膩的細節處理,融學生的自感、自悟、自述、自解于一體,把新授知識有層次、有節奏、有深度的展示給學生,易于學生理解和掌握,精彩而有效,實在且生動。結合高老師的這節課,我作思想上的放縱,細數一二:
        一、現實、豐富、多樣的課堂教學內容體現教者對教材的深刻理解和挖掘。
        我們看到,教師在執教時已經對教科書的內容進行教學法的再加工,并以貼近學生生活的方式呈現出來。教師注重從學生身邊、社會發展等方面選擇實例,作為情境的創設起點、作為數學學習活動的素材引進課堂,使數學內容具有豐富的現實背景,這樣做,一方面可以調動學生的思維,激發學生的積極性,另一方面可以用淺顯的內容引入新課,加強了新知與生活的聯系,便于學生進一步理解新知。例如,開課時,高老師播放了課件,以新聞聯播播報的形式向大家介紹了大家比較關注的甲型H1N1流感在全世界的發展情況,并出示了一組統計數據:據統計截止今天全世界甲型H1N1流感的人數  墨西哥 356例,美國23例,中國1例,日本13例——一下子把統計的作用淋漓盡致的表現了出來,顯示了統計的現實意義和重要作用,為全課的教學奠定了一條很好的基調。
        二、科學、合理、流暢的教學流程體現了教師對文本的準確把握和獨到理解
        本課結構合理、安排到位、層次清楚、過渡自然。教師能以學生的生活經驗、已有的知識和學習經驗為基礎,依循學生的認知規律組織豐富的數學活動,為學生提供看、想、說、做的條件與空間,引導學生獲取數學知識、領悟數學思想方法、獲得全面發展。
        高老師從新聞片段入手,以大家關心的生活健康內容為起點,順理成章的板書課題。接著教師話題一轉,問學生“我們國家將迎來一個重要的節日是什么?”自然地由國慶節給鼓號隊員做衣服,引出問題:怎樣給同學做衣服,需要什么條件?引出收集學生的身高數據,再由數據引出分段整理和制作統計表,進而分析數據。這一段新知環環相扣,清晰而自然地展示了學生的學習過程,效果明顯有效。
        練習設計科學有序,理解掌握熟練應用。小學數學課堂練習的設計是課堂教學的重要組成部分和有益的延續,是學生消化理解鞏固所學知識的重要途徑,是培養發展學生思維的有效方法。科學合理有序的安排課堂練習,使之達到最佳的教學效果是本節課的又一大特色。
        在對新知進行總結之后,高老師設計了有層次、遞進的習題。習題一讓學生用畫正字的方法統計結果,并填表。習題二先通過“你知道嗎”介紹空氣污染指數,接著讓學生直接填表并讀表。在習題二的處理上,教師有了一個變化,少了習題一中讓學生畫正字統計的過程,多了介紹空氣污染指數的知識。習題三,教師放手學生到臺下統計教師的工資,并分段整理,填表,讀表分析。讓學生經歷統計的全過程,既聯系了舊知又鞏固了新知,為全課畫上了一個完美的句號。
        高教師這樣圍繞教學目標,精心設計教學環節,教學情節層層遞進,環環相扣,層次清楚、條理分明,為全課目標的達成鋪平了道路。
        值得我們學習和長久反思。
        三、靈活、多變、有效的教學組織形式體現教師扎實的教學基本功。
         教學方法是完成教學任務、實現教學目標的關鍵。學生參與主動探究,雙基情感落到實處。《數學課程標準》指出教師應激發學生的學習積極性,向學生提供充分從事數學活動的機會,幫助他們在自主和合作交流過程中真正理解和掌握基本的數學知識和技能、數學思想方法獲得廣泛的數學經驗。學生是數學學習的主人,教師是數學學習的組織者、引導者和合作者。本節課教師始終把學生推向主體的位置,所有的數學教學活動都是在教師的組織下,學生積極參與下完成的。
        此外,教師深厚的教學功底,豐富的教學經驗,調控駕馭課堂的組織能力,簡潔明快的語言,富有激情的表達,思維縝密的思考,一幅給人為之一亮的板書,都給人留下了令人難忘的印象。
                    


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