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恰逢春光好,正值教研时。为了提高数学课堂教学效果,让教师清楚地看到不同教师对同一教材内容的不同处理,不同的教学策略所产生的不同效果。2023年3月29日上午,澄迈县金江中心学校开展了五年级数学“同课异构”教研活动,教研组长李蓉老师主持,中心校、京岭分校和各完小全体数学老师都参加了此次活动。
活动分为两个环节:一、两节展示课;二、网上研讨。
同课异构的课题是五年级数学下册《分数的基本性质》,由副校长罗林涛和王草江老师进行执教。
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执教:罗林涛
《分数的基本性质》罗林涛老师先让学生在任务单上写出3个商是2的除法算式,接着通过观察算式,初步感知“变与不变”,然后通过《唐僧师徒分西瓜》故事引导学生用3张正方形纸折和涂出1/2,2/4,4/8,再比较这几个分数的大小。同学们通过动手操作,折、涂、比,发现1/2,2/4,4/8的分子和分母变了,但是大小不变。罗老师让学生联系商不变的性质,理解分数的基本性质。实现新知化归旧知,在沟通联系中渗透类比的数学思想方法. 利用旧知识解释新知识,进一步实现了知识的迁移内化。
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执教: 王草江
《分数的基本性质》王草江老师先通过“三毛分饼”故事导入,激发学生学习兴趣,然后引导学生用3张正方形纸按照课件中的图形折、涂出1/2、2/4和4/8,再交流探究分数的基本性质。课堂上学生大胆猜测,动手验证,很大程度调动了学生学习的积极性。王老师的肢体语言丰富,很大程度拉近了师生的联系,但不足之处在于时间分配不当,新授时间较多,练习时间较少。
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"source":0,"text":"课后,听课老师在微信教研组议课。
","type":1},{"audio_music_id":0,"ext":{"unique_id":"08c3f237762f78457213d034c69d01a6"},"sectionPublished":false,"source":0,"text":"各位数学老师,五年级同课异构在微信教研组评课。请授课老师罗林涛副校长和王草江老师上传授课反思,各位听课老师按照一个亮点、一个不足和一个建议进行评课。
王草江:
我对这节课的设计是:从大胆猜想、实验感知、观察讨论到概括总结,完全是为学生自主探究、合作交流的学习设计的。想让学生从找规律中发现分数的基本性质,在学生直接说出分数的基本性质之后,进一步引导学生运用商不变的性质及分数与除法的关系加深理解,从而完成本课的教学目标。但在教学过程中,我说得过多,学生探究,讨论的时间少,没有提现出学生是学习的主体思想。这节课还有很多不足,希望各位能给我多提一些的宝贵建议,谢谢。
冯华莉:
罗校长的课给我感受最深的就是教学中对学生的启发、点拨恰到好处,与学生的交流亲切自然,驾驭课堂的能力让人佩服。这节课充分运用知识的迁移,调动了学生的知识积累,使学生学的轻松、愉快,同时感悟了知识的形成过程。这节课以“商不变的性质”复习引入,通过填空题充分复习了“被除数和除数同时扩大或缩小相同倍数,商不变。”再由故事给课堂创设了一种“猜想——验证——反思”的教学模式,在验证过程中培养学生的动手能力,以及观察问题解决问题的能力。最后引导学生观察和比较大小,从而概括出分数的基本性质。建议:我感觉本课教学中,验证得还不够透彻,部分同学还有疑虑。要求学生在纸上涂一涂时,许多学生没有进行涂一涂,所以导致有的学生说面积变小了。
王草江老师这节课充分运用知识的迁移,调动了学生的学习兴趣和知识积累,使学生学的轻松、愉快,同时感悟了知识的形成过程。这节课以“三人分饼的故事”问题引出课题,又用课堂知识做了解决,最后证实了分饼的结论。建议:在用正方形纸张折叠出三个分数时,教师已经在上呈现出了图形,学生会受到上的图折叠,思维受到了限制,可能不会再去想其他的方法。
完小王能
罗校长的课。优点:充分反挥了,学生是学习的主体,老师是课堂的引导者,学生学习的引导者。放手让学生自己探究,引导学生发现规律,总结规律,概括出分数的基本性质。总之优点非常的多,是一堂以学生探究为主的优秀课。不足:学生归纳总结分数的基本性质的时候,不要过于展开,学生单独回答归纳 分数的基本性质的时候时间过长。建议:归纳分数的基本性质的时候,不要太过于放手,两三学生归纳总结不到位,直接点出他们的缺点,收回来给出正确的表述。
王草江老师这堂课。一个亮点:多媒体展示,涂一涂比一比。直观展示了分法不一样,分数不一样,但结果一样。一个不足:给学生单独探究的时间过少。一个建议:大胆放手,让学生自主探究,进行比较,分析,小结。
王忠:
罗林涛校长的这堂课,让学生通过自主猜想,自主验证,自主发现,让学生折一折,涂一涂,比一比,说一说的实践活动中把静态的知识转化为动态的求知过程,让学生认识了分数的基本性质。
曾海玲:
《分数的基本性质》这节课,在我们整个小学数学的教学中,它是起着承上启下的作用的,因为它与我们整数除法“商不变的性质”是有着内在的联系的,它又是为了学生后面要学习的通分和约分打基础的。
罗校这节课,他对这个新旧知识的衔接处理得比较巧妙,比如说从开始复习除法和分数间的关系,再引导学生观察3个分数的分子和分母有什么联系,很好的引导了学生比较、观察分数的分子、分母的变化过程,让学生在这种变与不变中去发现规律;罗校教学的方法也比较多样化,他从折一折、涂一涂、比一比中让学生感受到分数大小不变的原因,然后,利用除法中商不变的规律,很好的去总结出分数的基本性质,顺利的完成了教学目标。
建议:在提问1/2=2/4=4/8是否相等时?先不要写上等于号,让学生在实践中自己去验证,最后才确定相等。
王草江老师这节课优点大家都能看到我就不多说了,只说一个建议:要记得板书,板书的设计是我们教学的一个重要环节,合理的板书是能够将我们的教学重点清晰的展示出来,使学生一目了然,轻松明确的感知到我们今天要所学习的内容。
王玉燕:
罗校课的优点:1.巧妙设计“学习单”来促进学生思维的发展。让学生通过阅读理解,讨论分析,自主解答的训练,把抽象的数学慨念生活化,把静态的数学知识动态化。2. 引导学生理解分母和分子不能乘或除以0这部分教学到位。不足:教学过程速度慢。建议:加快语速、指导、引导速度。 王草江老师的课的优点:过程清晰,环节紧扣主题教学。不足:少数孩子回答问题;板书不完整。建议:激励孩子发言,完善板书。
刘元新:
听了《分数的基本性质》这节课,我认为罗老师在整堂课中为学生提供了有趣的故事情境以及大量的数学素材,让学生去观察、感悟,加上极其亲和力的自然交流融汇及精辟的启发点拨,充分体现了教师是数学学习的组织者、引导者与合作者。
徐弘:
听了罗校这节课,他做到了温故而知新,从除数的基本性质过渡到分数的基本性质,从而使学生从量变到质变,达到教学的目的。
李日川:
同课异构《分数的基本性质》,这节课教学内容很重要,与前面商不变的规律,和后面分数的运算与比有着紧密的联系,内容看似简单,内在关系较为抽象。让每位学生深入理解并掌握,应用知识解决问题。罗校长渗透变与不变数学思想进行教学,通过操作、比较、小结去理解知识,关注学生学习过程的感受,引导学生认真思考,建议在学生学习过程中合作学习,互相说一说自己的感觉和收获。王草江老师课堂教学流程较好,不足是折一折中限制学生的思维,不能调动学生学习积极性,上课较为被动,学习效果不够好。建议多从学生感知入手,引导学生参与到学习中来。
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文字:李蓉
审核:曾蕊
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活动分为两个环节:一、两节展示课;二、网上研讨。
同课异构的课题是五年级数学下册《分数的基本性质》,由副校长罗林涛和王草江老师进行执教。
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执教:罗林涛
《分数的基本性质》罗林涛老师先让学生在任务单上写出3个商是2的除法算式,接着通过观察算式,初步感知“变与不变”,然后通过《唐僧师徒分西瓜》故事引导学生用3张正方形纸折和涂出1/2,2/4,4/8,再比较这几个分数的大小。同学们通过动手操作,折、涂、比,发现1/2,2/4,4/8的分子和分母变了,但是大小不变。罗老师让学生联系商不变的性质,理解分数的基本性质。实现新知化归旧知,在沟通联系中渗透类比的数学思想方法. 利用旧知识解释新知识,进一步实现了知识的迁移内化。
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执教: 王草江
《分数的基本性质》王草江老师先通过“三毛分饼”故事导入,激发学生学习兴趣,然后引导学生用3张正方形纸按照课件中的图形折、涂出1/2、2/4和4/8,再交流探究分数的基本性质。课堂上学生大胆猜测,动手验证,很大程度调动了学生学习的积极性。王老师的肢体语言丰富,很大程度拉近了师生的联系,但不足之处在于时间分配不当,新授时间较多,练习时间较少。
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"source":0,"text":"课后,听课老师在微信教研组议课。
","type":1},{"audio_music_id":0,"ext":{"unique_id":"08c3f237762f78457213d034c69d01a6"},"sectionPublished":false,"source":0,"text":"各位数学老师,五年级同课异构在微信教研组评课。请授课老师罗林涛副校长和王草江老师上传授课反思,各位听课老师按照一个亮点、一个不足和一个建议进行评课。
王草江:
我对这节课的设计是:从大胆猜想、实验感知、观察讨论到概括总结,完全是为学生自主探究、合作交流的学习设计的。想让学生从找规律中发现分数的基本性质,在学生直接说出分数的基本性质之后,进一步引导学生运用商不变的性质及分数与除法的关系加深理解,从而完成本课的教学目标。但在教学过程中,我说得过多,学生探究,讨论的时间少,没有提现出学生是学习的主体思想。这节课还有很多不足,希望各位能给我多提一些的宝贵建议,谢谢。
冯华莉:
罗校长的课给我感受最深的就是教学中对学生的启发、点拨恰到好处,与学生的交流亲切自然,驾驭课堂的能力让人佩服。这节课充分运用知识的迁移,调动了学生的知识积累,使学生学的轻松、愉快,同时感悟了知识的形成过程。这节课以“商不变的性质”复习引入,通过填空题充分复习了“被除数和除数同时扩大或缩小相同倍数,商不变。”再由故事给课堂创设了一种“猜想——验证——反思”的教学模式,在验证过程中培养学生的动手能力,以及观察问题解决问题的能力。最后引导学生观察和比较大小,从而概括出分数的基本性质。建议:我感觉本课教学中,验证得还不够透彻,部分同学还有疑虑。要求学生在纸上涂一涂时,许多学生没有进行涂一涂,所以导致有的学生说面积变小了。
王草江老师这节课充分运用知识的迁移,调动了学生的学习兴趣和知识积累,使学生学的轻松、愉快,同时感悟了知识的形成过程。这节课以“三人分饼的故事”问题引出课题,又用课堂知识做了解决,最后证实了分饼的结论。建议:在用正方形纸张折叠出三个分数时,教师已经在上呈现出了图形,学生会受到上的图折叠,思维受到了限制,可能不会再去想其他的方法。
完小王能
罗校长的课。优点:充分反挥了,学生是学习的主体,老师是课堂的引导者,学生学习的引导者。放手让学生自己探究,引导学生发现规律,总结规律,概括出分数的基本性质。总之优点非常的多,是一堂以学生探究为主的优秀课。不足:学生归纳总结分数的基本性质的时候,不要过于展开,学生单独回答归纳 分数的基本性质的时候时间过长。建议:归纳分数的基本性质的时候,不要太过于放手,两三学生归纳总结不到位,直接点出他们的缺点,收回来给出正确的表述。
王草江老师这堂课。一个亮点:多媒体展示,涂一涂比一比。直观展示了分法不一样,分数不一样,但结果一样。一个不足:给学生单独探究的时间过少。一个建议:大胆放手,让学生自主探究,进行比较,分析,小结。
王忠:
罗林涛校长的这堂课,让学生通过自主猜想,自主验证,自主发现,让学生折一折,涂一涂,比一比,说一说的实践活动中把静态的知识转化为动态的求知过程,让学生认识了分数的基本性质。
曾海玲:
《分数的基本性质》这节课,在我们整个小学数学的教学中,它是起着承上启下的作用的,因为它与我们整数除法“商不变的性质”是有着内在的联系的,它又是为了学生后面要学习的通分和约分打基础的。
罗校这节课,他对这个新旧知识的衔接处理得比较巧妙,比如说从开始复习除法和分数间的关系,再引导学生观察3个分数的分子和分母有什么联系,很好的引导了学生比较、观察分数的分子、分母的变化过程,让学生在这种变与不变中去发现规律;罗校教学的方法也比较多样化,他从折一折、涂一涂、比一比中让学生感受到分数大小不变的原因,然后,利用除法中商不变的规律,很好的去总结出分数的基本性质,顺利的完成了教学目标。
建议:在提问1/2=2/4=4/8是否相等时?先不要写上等于号,让学生在实践中自己去验证,最后才确定相等。
王草江老师这节课优点大家都能看到我就不多说了,只说一个建议:要记得板书,板书的设计是我们教学的一个重要环节,合理的板书是能够将我们的教学重点清晰的展示出来,使学生一目了然,轻松明确的感知到我们今天要所学习的内容。
王玉燕:
罗校课的优点:1.巧妙设计“学习单”来促进学生思维的发展。让学生通过阅读理解,讨论分析,自主解答的训练,把抽象的数学慨念生活化,把静态的数学知识动态化。2. 引导学生理解分母和分子不能乘或除以0这部分教学到位。不足:教学过程速度慢。建议:加快语速、指导、引导速度。 王草江老师的课的优点:过程清晰,环节紧扣主题教学。不足:少数孩子回答问题;板书不完整。建议:激励孩子发言,完善板书。
刘元新:
听了《分数的基本性质》这节课,我认为罗老师在整堂课中为学生提供了有趣的故事情境以及大量的数学素材,让学生去观察、感悟,加上极其亲和力的自然交流融汇及精辟的启发点拨,充分体现了教师是数学学习的组织者、引导者与合作者。
徐弘:
听了罗校这节课,他做到了温故而知新,从除数的基本性质过渡到分数的基本性质,从而使学生从量变到质变,达到教学的目的。
李日川:
同课异构《分数的基本性质》,这节课教学内容很重要,与前面商不变的规律,和后面分数的运算与比有着紧密的联系,内容看似简单,内在关系较为抽象。让每位学生深入理解并掌握,应用知识解决问题。罗校长渗透变与不变数学思想进行教学,通过操作、比较、小结去理解知识,关注学生学习过程的感受,引导学生认真思考,建议在学生学习过程中合作学习,互相说一说自己的感觉和收获。王草江老师课堂教学流程较好,不足是折一折中限制学生的思维,不能调动学生学习积极性,上课较为被动,学习效果不够好。建议多从学生感知入手,引导学生参与到学习中来。
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","type":1},{"audio_music_id":0,"ext":{"unique_id":"129f1e102a7fddf420c526e9070b17e8"},"sectionPublished":false,"source":0,"subtitle_align":"center","subtitle_color":"#010101","subtitle_font_size":"medium","subtitle_style_id":1,"text":"摄影","type":6},{"audio_music_id":0,"ext":{"unique_id":"492f8e8facb06a9426b26e8c6cfa5f27"},"sectionPublished":false,"source":0,"text":"摄影:李日川、谢李丽
文字:李蓉
审核:曾蕊
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