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二年级数学说课稿全册 二年级数学说课稿人教版篇一
学生已经学过加法、减法,这一节是学生学习乘法的开始,由于学生没有乘法的概念,加之这个概念又难以建立,在这种情况下,教材一开始就专列了一节"乘法的初步认识",使学生知道乘法的含义,为以后学习乘法的其它知识奠定十分重要的基础。
1、使学生初步认识乘法的意义,掌握乘法算式的读法和写法。
2、培养学生分析、比较、综合、抽象概括初步逻辑思维能力。
3、渗透数学知识来源于实践,培养学生学习数学的积极性。
初步认识乘法的意义,能把相同加数连加改写成乘法算式。
理解乘号前后两个数所表示的不同意义。
学生是学习的主体。本节课的教学对象是我校数学教育专业二年级的学生,他们的学习兴趣比较高,但存在两个学习误区:1、渴求实践,排斥理论。这种轻视、讨厌、逃避、拒绝理论的学习心理直接影响了学生对理论知识的学习兴趣和效果;2.强于接受,弱于研究。我们的学生已习惯于被老师“灌输”和“填充”,对研究型的学习方式很不适应。而这对于培养能适应新课程改革需要的师资十分不利。
1、理论解析法:由教师运用讲解的方式,向学生介绍必要的理论知识,引领学生初步感受理论的价值。
2、案例分析法:理论必须用起来,学生才会感受到它的真正价值。案例分析,为实践与理论之间架设起了联系的桥梁,有助于激发学生的思考,有助于学生把理论逐渐内化成分析问题、解决问题的工具。
3、问题研讨法:问题是学习的心脏,运用问题研讨法,有助于激发学生的问题意识,提高学生分析问题、解决问题的能力。
抓准新旧知识的联系,促进学生学习的正迁移.本节教学内容与相同加数连加有着相互依赖的关系,是在认清相同加数和相同加数的个数的基础上引发出来的,因此再现和再强化相同加数连加是十分必要的 。
1、出示:5+5+5+5+5+5这些算式写起来比较长,这节课我们来学习一种新的简单的方法来表示它.(板书课题)通过准备题,使学生进一步建立起相同加数的概念,掌握相同加数连加式题的特征,并能初步认识到:相同加数连加,就是求几个相同加数的和,从而为学习乘法做了孕伏。
2、加强直观,借助演示。操作,初步理解乘法的意义,掌握乘法算式的读法和写法.例题的处理要借助卡片(红花卡片、正方形卡片和圆形卡片)的直观演示、操作来达到初步理解乘法意义的目的.具体可采用以下程序:演示操作--列连加算式--找出相同加数的个数--写出乘法算式,并指导算式的写法、读法和定义,并认识“×”号.认识“乘法算式”要通过教师的直观演示、学生实际操作、认真的观察分析来完成.
3、巩固练习,强化新知。根据低年级学生的心理特征和本节课的教学重点、教学难点,注意设计出目标明确、重点突出、层次分明、饶有趣味的练习,这样可以巩固和强化学生对所学知识的理解和掌握,逐步形成技能技巧.
4、课外延伸,拓展学习时空。
在进行课堂小结之后,布置课后作业。 苏霍姆林斯基说过:“有经验的教师,在讲课的时候,好像是微微打开一个通往一望无际的科学世界的窗口,而把某些东西有意地留下来不讲。”我想,课堂学习时间的结束不代表学生学习活动的停止,作为教师,我们有必要给学生布置一些课外拓展作业,让学生在完成课外作业的过程中,进一步地开阔视野,丰富经验,生成智慧,增强素质,体会那种由自主学习所带来的愉悦感和成就感。
认识乘法
① 加法算式
2+2+2=6
乘法算式:2×3=6 读作2乘3
表示3个2相加
2表示相同的加数是2,
3表示相同加数的个数是3个。
② 加法算式
3+3+3+3=12
乘法算式:3×4=12 读作3乘4
表示4个3相加
3表示相同的加数是3,
4表示相同加数的个数是4个。
总结:求几个相同加数的和,用乘法比较简便。
二年级数学说课稿全册 二年级数学说课稿人教版篇二
九年制义务教育小学数学(青 岛版)二年级上册第六单元信息 窗2《用6~9的乘法口诀求商》。
本节课的教学内容,是在学生已经 掌握了一年级下册第七单元《乘法的 初步认识》、本册第一、三单元《表 内乘法》和本单元信息窗1《用2~5的 乘法口诀求商》基础上学习的。同时 本节课的内容又为学习第八单元《有 余数的除法》打下基础。
知识与技能:让学生能利用6~9的乘法口诀求商。熟 练掌握用口诀求商的一般方法。
过程与方法:感受数学与生活的联系,能解决生 活中简单的实际问题 。
情感态度与价值观:培养学数学、用数学的乐 趣。
能熟练地用6~9的乘法 口诀正确求商 。
教学难点:
用6~9的乘法 口诀求商解决实际问题 。
二年级学生思维方式主要 还是形象思维,他们乐于 探究,渴望交流和教师的 称赞,他们经历了一年级 下册第七单元《乘法的初 步认识》,二年级上册第 一单元、第三单元《表内 乘法》、第四单元《除法 的初步认识》和本单元第 一课时信息窗1的学习过 程。初步掌握了用乘法口 诀求商的基本方法。
让学生用6~9的乘法口诀 求商,从方法上来讲,学 生不会有什么困难,但是 这要建立在学生对乘法熟 练掌握的基础上。另外, 本课的教学内容是在一个 具体的问题情境中进行, 对该类问题的熟练解决也 是本课教学的成败关键。
1、合作,就是要切磋学 问,交流疑问,共同 完成学习任务。
2、探究,则是要求质 疑问难,深入研究 并解决问题。
3、自主,即主动,要主动 地在数学实践中丰富数 学素养,提高数学能力。
1、前置学习:比比谁做的最快!
设计意图:以旧引新,通过知识的迁移,抓住新旧知识的连接点,为下面学习新知识做好铺垫。
2、创设情境 引入课题
同学们,你们知道标本是什么 吗?咱们和书上的小朋友一起 来制作标本吧。
设计意图:结合现实的生活场景,激发学生学习的兴趣。
3、自主学习
1.仔细观察情境图,能发现哪些数学信息。
2.你能提出哪些数学问题。
3.尝试着把你提出的数学问题解决出来吧。
设计意图:引导学生有序的观察、发现数学信息,加强学生的语言训练,沟通语文数学学科的联系, 培养他们的观察能力及听、说的能力,同时训练学 生从活动中获取有效的数学信息的能力。
4、探索交流 解决问题
42朵花能做7件标本,做一件标本需要几朵花?
小组交流汇报 独立解决
42÷6= 42÷7=
我们的方法是_________口诀:六七四十二
小结:除数和几相乘得被除数,那么商就是几。
小结:一句口诀可以求两道除法算式的商。
根据情景图,小组合 作,提出问题并解决。
56片叶子可以做几件标本?
56÷8=7(件) 交流自己的想法。
72片叶子可以做几件标本?
72 ÷ 9=8 (件)使学生感受多种策略解决问题。
设计意图: 这一环节是落实教学目标的中心环节,本环节采用“放”的形式,经过引导使学生通过观察、分析、自主探究、小组合作等活动,利用已有的知识经验获得解决问题的基本思路和求商的方法。
5、巩固应用 内化提高
第一关 我是小法官
设计意图:这道是基础题,为了加强学生对新知 识的理解 。
第二关 看谁算得快
设计意图:让学生练习一句乘法口诀可以列四道 算式 。
第三关 我最棒
设计意图:使学生感受到数学知识来源于生活又服务于生活,进一步体会数学与生活的联系,从而培养学 生用数学知识解决生活中的一些实际问题。
6、回顾整理 内化提高
设计意图:引发学生对本课所学知识的思考,自主进行知识的内化;教师总结和点评,对知识进行梳理的 同时也激发了学生的成就感。
二年级数学说课稿全册 二年级数学说课稿人教版篇三
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二年级数学说课稿全册 二年级数学说课稿人教版篇四
《有趣的七巧板》是课题学习,而“课题学习”作为新课程标准的一大特色,它是一种新型的学习活动。 课标对它的要求是所有的学生都能参与,在全体学生获得必要发展的前提下,不同的学生可以获得不同的体验。本课题与众不同,要求学生主要拼多边形。原因主要有以下两点:(1)用七巧板拼多边形与已学过很多重要知识联系密切;(2)便于学生探索拼图规律。
“兴趣是最好的老师”。 但成功并不意味着没有困难,我预计在活动中学生的难题突出表现在以下两个方面:(1)学生只对拼图感兴趣,而不善于发现其中蕴含的数学知识和拼图规律;(2)拼摆多边形时,受思维局限性的影响,缺乏创新意识,心理耐挫能力不强。
知识与技能
1、加深对勾股定理、等腰直角三角形和四边形性质等重要知识的理解。
2、进一步体会平移、旋转、轴对称等全等变换在拼图中的应用,初步建立空间观念。
过程与方法
1、通过七巧板的制作、拼摆,体验 “分解--组合” 的过程。
2、探索用七巧板拼摆多边形的规律,体会数形结合的思想。
情感态度与价值观
1、拼图活动中体验方法的多样性,感受七巧板的文化价值。
2、活动中,鼓励学生敢于发表自己的观点,培养参与意识与团队精神。
3、增强从纷繁复杂的事物中探索规律的意识。
4、通过获得成功的体验和克服困难的经历,增强学习数学的自信心。
经历用七巧板拼多边形的过程;积累拼图经验;探索拼多边形的规律。
探索用七巧板拼多边形的规律。
在学法上,主要采用学生动手实践,自主探究与小组合作相结合等方法。作为教师,要深入到各组,了解学生的思维过程,并不失时机地进行指导,点拨。
查阅七巧板的有关知识,并准备好学具:边长 12cm正方形硬纸板、剪刀、三角尺、彩笔。教具:多媒体课件。
(1)我来说一说。让学生介绍七巧板的由来。
这样既给了学生展示课外预习成果的机会,又让学生感受到了祖国光辉灿烂的文化。如果学生介绍的不够全面,教师可做适当的补充。
(2)一起做一做。首先请学生口述:如何把自己手中的正方形硬纸板分割成七巧板?
提醒学生抓住五个中点,然后观察画好的七巧板图,寻找七巧板中所蕴藏的数学知识,分别从边,角,面积三方面分析。引导学生共同分析出七块板的特点,尤其是边,角的关系为探索规律埋下了伏笔。最后让学生在纸板上涂上自己喜欢的颜色,并按教材的方法标上序号,剪开,这样一副七巧板就做好了。
这是本课题的重点也是难点,我对教材的“想一想”和“议一议”的内容做了整合,设计了这样的问题来引导学生探索规律:首先让学生从七巧板中任选至少2块板拼多边形,每拼出一种,就画出它的拼法示意图。2分钟内看谁拼的多。
每个学生都想拼出更多的图形来证明自己的实力,因此增强了学生之间的竞争意识,提高学习效率,培养学生的时间观念。
接下来投影展示学生的拼图成果,教师也可适当补充,让学生发现用七巧板可以拼摆出各种各样的多边形。那么是不是所有的.多边形都可以用七巧板拼出?即用七巧板所拼摆的这些多边形有什么共同特点?小组带着这个问题进行探讨,提示学生可以从边,角两个方面考虑。
鼓励学生充分发挥团队精神,知识共享,共同合作,争取第一个完成任务。
然后师生整合各小组的看法,得出规律。最后让学生回答:你能用七巧板中的若干块板拼出一个等边三角形吗?为什么?
这个问题重在对规律的进一步认识和理解。在整个探究规律活动中,教师要善于发现学生的独特表现,给予鼓励,促进每个学生得到不同的发展。
这也是本课题的重点。
(1)活动一:用七巧板拼出如图的五边形,其中一块⑤号板已经放好,请将其余6块板拼好,并画出拼法示意图。看谁的拼法多。
采用个体比赛的形式,在规定的时间内完成任务,这样既符合了学生爱动手的特点,又激发了学生的竞争意识,培养学生独立完成任务的能力。
最后通过展示学生的成果,让学生体验拼图方法的多样性。
(2)活动二:自由发挥,用一副七巧板拼多边形(每组从三角形、四边形、五边形、六边形中任选一种,尽可能多的拼出不同形状,并有所记录。)
采用小组合作比赛的方式,小组从选题到操作再到记录最后到展示,可以充分体现一个团队的分工与合作意识,让学生体验团队精神的重要性。估计学生的答案不完整,这里教师可以给出几种答案,可做适当补充。 从边角两个方面进一步加深对规律的认识。
这是一个机动环节。可根据具体情况而定。学生通过欣赏教师提供的范例,自己设计一个喜欢的、有趣的图形,也可以仿照老师的,进行自己的创新并加以展示。这个活动学生会很感兴趣,但受思维局限性的影响,可能无从下手,这时,教师要鼓励学生大胆创新,展示自己的个性。让不同的学生获得不同的体验。
我最大的收获是什么?我掌握了哪些拼图方法?我表现最好的是 .我的疑惑是。为了回扣目标,从知识与技能,过程与方法和情感态度与价值观三方面设计了这样几个问题,学生畅谈,做到全员参与,强化了重点,培养了学生口头表达能力,同时学生对自己和他人的学习进行反思,锻炼评价能力和反思能力。
通过目莲拯救母亲的游戏,激发学生学数学用数学的兴趣,最后学生在精美的拼图和轻柔的音乐声中结束本课题的学习。
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