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除法的初步认识一教学反思篇一
表内除法是学习除法的基础,而“除法的初步认识”又是学生学习除法的开始。因此学生对除法意义的理解及对除法的兴趣将直接影响到后面的学习,所以这节课显得尤为重要。 我在设计教案时,把教学重点确定为“通过实际分东西,使学生知道除法的含义”。为此安排了几个层次教学:
(1)、由同样多引出平均分。这一层次安排两次实践操作,一是把8张数字卡片分成2份,每份要同样多,通过第一次动手操作由学生的汇报引出“同样多”,通过第二次动手操作和教师的提问引出“平均分”。
(2)、用“平均分”指导操作,让学生把6个苹果平均分成3份,求每份是几个。
(3)、把“平均分”这一生活常识抽象成除法算式。解决了“平均分”之后,教师指出把6个苹果平均分成3份,每份是2个,可以用除法来表示,于是抽象出除法算式。
(4)、结合除法算式教学除法算式的读法和意义。 整堂课完成得很顺利,学生都对实践操作很感兴趣,通过实践加深了对“平均分”的理解,也对今后的除法学习产生了浓厚的兴趣。
除法的初步认识一教学反思篇二
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除法的初步认识一教学反思篇三
传统的概念教学过分地注重了以听讲、记忆、模仿为主的接受性学习,在这样的学习中学生毕恭毕敬地听讲,虽然也能较快地掌握知识,但对学生的身心发展却是不利的,作为一个独立的个体,他们在课堂中缺少自己的思考空间,缺少自己的活动时间,缺少机会展现自己的独特思维,也就无法从内心产生对数学学习的浓厚兴趣,长此以往,学生的积极性和主动性便会不断消蚀,这与我们“以人为本”的教育核心理念是相违背的。
本课的教学中我通过让学生参与各种各样的体验活动,让学生在生动具体的情景中主动建构知识,收到了很好的效果:在分纸牌中,学生在动手操作后提出了数十种方法,也深刻地理解了平均分;在圈圆点图时,有的学生把12个圆点平均分成了2份、3份、4份、6份,有的学生把10个圆点平均分成了2份、5份……;请他们用上“平均分”来介绍自己的作品时,个个把手举得高高的,争着抢着要上来表现。课堂成了充满体验和乐趣的百草园,也许这样的课堂少了很多正襟危坐的课堂常规,但我却收获了孩子们放飞思维的惊喜。
《课程标准中》强调,学生是数学学习的主人,教师是数学学习的组织者、引导者、合作者。对于这句话的理解我曾一度陷入了误区:过份地注重了学生的主动发挥,任何知识都千方百计地引导,一定要让知识从学生的口中说出来。如第一次我教学这一课时,在引出÷这一环节,我是这样设计的:大家能不能创造一个符号表示平均分呢?学生由于一下子反应不过来,基本上是用“猜”的,他们说出了、+等各种符号,我都一一否定了,最后才有一位同学终于猜出了是“÷”,整个过程花了3分钟左右。课后我进行了思考:这样的创造是真的创造吗?归根到底,这个知识还是教师“挤牙膏”似地从学生地方挤出来的,不仅浪费了宝贵的课堂教学时间,而且也并不见得学生体验到了“创造”的喜悦。基于这样的考虑,我对这一部分教学又进行尝试:同学们,平均分在我们数学上还可以用一个符号来表示,(板书÷)这个符号你认识吗?(学生纷纷说是除号),再请他们观察除号有什么特点。与第一次的教学相比,这一次直截了当地出现÷,不仅节约了教学时间,而且能有效激活学生的原有经验,加深了对除号的认识,体会到了学习的快乐。
通过这一环节的对比教学,我对师生在课堂中的角色定位又有了新的认识:在角色的定位中教师不能从一个极端走向另一个极端,学生学习的主体性、探索性固然要突出,但必要的时侯,教师也应扮演好引导者的角色,适时地介入学生的学习。这也需要我们站在课改的潮流中常常进行冷静的思考和实践,唯有如此,才能使课堂少一些浮躁,多一份真实。
除法的初步认识一教学反思篇四
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除法的初步认识一教学反思篇五
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除法的初步认识一教学反思篇六
除法是小学数学计算教学的重要组成部分,表内除法是学习除法的基础,而“除法的初步认识”又是学生学习除法的开始。因此学生对除法意义的理解及对除法的兴趣将直接影响到后面的学习,所以这节课显得尤为重要。教学建议中提到:让学生摆学具、看课件演示分的过程等活动,充分感知“平均分”与除法的关系,真正把突出重点和突破难点落到实处。
低年级学生的认知特点是具体形象思维为主,喜欢动手是他们的天性。数学活动中的操作既可以激发学生参与数学活动的兴趣,更重要的是帮助学生体验、理解数学的知识。因此,我在教学中把学的权力交给学生,让学生自己动手去摆一摆、分一分。在设计教案时,把教学重点确定为“通过实际分东西,使学生知道除法的含义”。让学生任意分6个桃子,从不一样多的分法和每份同样多的展示,让学生直观的感受平均分,理解除法的意义。学生的认知建立在表象的基础上,也就突破了除法这个抽象概念的难点。突出了除法的本质属性:把一个数分成相等的若干份就是平均分,平均分可以用除法表示。在把握教材时抓住除法的本质属性,淡化其非本质属性。
课后,带给我的反思是很多的,其中最主要的两点:
过去,我们总怕孩子听不懂、记不住。课上教师说得多、重复的地方多,给学生说的机会并不多。我们都知道学生都有一定的生活经验和知识基础积累,他们有对问题的看法和理解,也想表达、诉说。他们很想把自己的想法说出来,跟老师交流。因此,我们一定要把学习的主动权还给学生。孩子们只有在经历知识建构的过程中,才能体会到学习的乐趣,成功的喜悦。同时在建构知识的同时,他们也学会了与同伴的交流与合作。
在课改实验中,尊重学生的选择,有利于培养学生的创新能力。本节课,如果按照先教后学的教法,学生学习的劲头就会打消一半。而还学生的主动权以学生,让他充分享受自主学习的快乐,学生那颗创新的幼苗没有受到伤害,并且相信能长成参天大树!
除法的初步认识一教学反思篇七
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除法的初步认识一教学反思篇八
单元是学生学习除法的开始,是学习除法概念的第一课,是今后学习除法的基础。而“除法的初步认识”是学生学习除法的开始,学生在原有的知识结构中没有这方面的知识,学生对除法意义的理解及对除法的兴趣将直接影响到后面的学习,本节包括“平均分”和“除法”两部分内容。本节教材主要是让学生在具体情境中通过实践操作明确平均分的含义,在头脑中形成平均分的表象,进而让学生在具体情境中体会除法运算的意义。
让学生掌握除法算式的写法和读法。而例4除法的含义,是学生学习除法的一个难点,本节课的教学“把一个数平均分成几份,求每份是多少”是学生学习除法的开始,关键是使学生理解“平均分”的含义,即每份分的结果同样多。
我从让学生小组合作分苹果开始,通过分东西使学生进一步明确“平均分”的含义。接着以故事的形式引入帮小熊猫平均分竹笋的具体情境,课上通过请学生演示帮小熊分竹笋的过程从而引出除法,使学生直观地了解除法的含义。再让让学生认识了除号,了解除法算式的写法和读法。整节课以平均分物的事例设计“除法”内容,有利于激发学生学习的情趣。更重要的是,让学生在生动具体的情境中认识除法。
我在进行教学设计时注意从生活实际出发,体现知识的形成过程,符合学生的认知规律。在教学过程中,注意创设情境和氛围,充分运用示范演示、学生实际操作等多种形式进行教学。教学时在知识点上,使学生清楚地看到平均分的过程,形象直观地理解除法含义,通过让学生分东西,使学生在探究知识的形成过程中,能力得到培养,学生的主体性得到发挥。在课堂上注重学生多方面的发展,实现三为目标,立足培养学生的创新意识和自主学习的能力。
本节课的不足之处:
1、有部分学生对除法的含义理解不到位,没有让学生说出每一个数在算式中所表示的含义?
2、练习题的设计较单一,应设计多样化的练习,练习题应有梯度。