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最新说课稿数学 说课稿ppt8篇

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说课稿ppt 篇二

《多一些、少一些、多得多、少得多》这部分教材是在孩子认识100以内的数,并学会比较数的大小的基础上安排的,通过教学,让孩子会用“多些”“多得多”“少些”“少得多”等词描述两个100以内数的大小关系,进一步培养数感。这部分内容是以前教材所没有的。

根据本节课的教学内容和孩子的年龄特点、已有经验,教学目标确定如下:

知识目标:在具体情境中,把握100以内数的相对大小关系,能用多一些、少一些、多得多、少得多等语言描绘。

能力目标:借助直观和经验,学会用“比较”进行猜数,并对猜数策略有所感悟。

情感目标:在轻松愉快的游戏过程中,能乐于表达交流,善于合作,激发学生学习数学的兴趣和自信心。

教学重点:理解“多一些”“少一些”“多得多”“少得多”具体含义,能用“多些”“少些”“多得多”“少得多”等词来描述两个数的关系。

教学难点:能用不同的语言表达或根据对方的提示进行一对一的猜数。

在本单元的教学中,我将先以孩子原有的生活经验和知识为背景,组织孩子进行合作交流、自主探索性学习,让孩子充分发表自己的意见,然后进行广泛交流,体现数学课堂的开放性。

多媒体课件、小棒若干

教学思路:直观感知——表象认识——概念形成——拓展运用

根据教学思路,在进行教学设计时我分为以下几个环节:

1、课前谈话,引入课题

课前谈话的时候我让学生自由地数了数听课老师的人数,问老师的人数和小朋友的人数比怎么样?接着就自然地开门见山引出了课题。

2、在猜中学习新知

课的开始,我从孩子们喜欢的弹珠引入,和他们一起玩猜弹珠的游戏。先出示10颗让孩子观察,然后出示红珠子,让学生通过和10颗蓝珠子进行比较以后猜一猜红珠子有多少个,接着让孩子观察14颗红珠子,猜绿珠子,在孩子猜的过程中,适时提问为什么猜这个数,自然就能引导孩子说出 “多一些”“少一些”“多得多”“少得多”这四个词语,孩子可以从图上直观地对这些词有一个初步的感知,通过这样的“猜珠子”的游戏还可以激发孩子的兴趣。

当出现这四个词语后,我在课件中设计了让三种颜色的珠子一起出现,让学生用新学的这四个词语来比一比,既让学生巩固了新知,又拓宽了学生的思维。

最后,把珠子去掉,就剩下三个数让学生再来说一说,这时从直观慢慢地过渡到抽象,符合学生的认知规律,所以学生能够通过跳一跳轻松摘到果子。

3、在玩中巩固新知

在孩子有了初步的认识后,我和孩子们再玩猜一猜的游戏,首先是猜实物小棒,通过让学生观察10根黄色小棒,相比较后再猜红色小棒,让孩子在猜数并说理由的过程中进一步体会“多得多”;接着是学生在老师的提示下猜抽象的数,在猜数的过程中感知100以内数的大小关系,进一步培养数感。最后我结合具体的情境让孩子去体会这四个词语的具体含义。

4、在活动中拓展延伸

在这一环节我设计了一些活动,比比身高(孩子和孩子比、老师和孩子比)、比比教室里和身边的一些数量大小,让孩子尝试用语言描述的同时体会数量之间的大小关系,感受到数学就在身边。最后由一个同桌猜数游戏,用多一些、少一些、多得多、少得多描述两个数量之间的大小关系,增强合作能力。

说课稿ppt 篇三

我说课的题目是《电脑绘画-椭圆工具》。

本节课是北京市义务教育课程改革实验教材《信息技术》教材第一册第二单元第3课的内容。本单元主要介绍“画图” 软件中椭圆工具的使用方法,使同学们了解“画图”软件的应用,并能运用它制作简单的电脑绘画作品,前几节课中学生已初步掌握了“画图”中一些工具的使用方法,本节课是原有基础的一次提高课,主要学习椭圆工具的使用方法,具有较高的实用价值。

根据《中小学信息技术课程指导纲要(试行)》通知中关于小学阶段的教学目标与内容安排进行内容的安排,本节课以任务驱动为主要教学方法进行教学设计。本节课的教学目标是让学生学会在椭圆工具的使用方法能够熟练、灵活地美化自己的作品。通过学习,培养学生的创新意识和创新能力以及自主学习的习惯;通过对自己及他人作品的评价,激发学生学习信息技术的主动性和创造性。 根据以上的教学目标,我把教学重点定位在教学重点:让学生掌握椭圆工具的使用方法。

教学难点:配合使用shift健,画出圆形。

针对本节课的教学目标,在教学中以任务驱动教学法为主,根据学生不能在机房上课,主要采取教师边讲授,学生边练习的教学方式进行教学,这样不仅使学生学习目标明确,使学生在课堂上能生动、有趣中学习。

(三)教学目标

依据教材的安排意图和学生现有的知识水平,我确定了以下教学目标

认知目标:学生学会用画出椭圆形和圆形。

能力目标:通过教学,培养学生发现问题、解决问题的能力,提升学生的操作技能,帮助学生养成良好的学习习惯;通过作品展示提高学生的自我创新的能力。

情感目标:在不断尝试中激发学生的求知欲;

(四)教学重难点

教学重点:让学生掌握椭圆工具的使用方法。

教学难点:配合使用shift健,画出圆形。

(五)教学过程:

首先复习上一节课学习过的内容,使用“矩形工具”可以画出矩形,配合shift键还能画出正方形。引出本节课的内容:椭圆工具。演示板书:椭圆工具:(1)画椭圆:选择工具箱内的椭圆工具,(2)画圆:按住shift键,同时按住鼠标。让学生知道:椭圆工具的用途,这是本节课的学习内容。按着教师讲使用方法。再用椭圆工具画一些日常用品,如汽球、杯子等。然后找几个学生到前面练习操作。

学生初步掌握椭圆工具的使用要领后, 然后趁热打铁,打开上节课图案画了一幅面“美丽的家园”,并对同学们说:“同学们,运用你们所学会的知识,今天,我们将继续画这幅画,让我们的家园更漂亮。蓝天中有白云,我们上节课已尼学习了白云的方法:使用铅笔工具,选择白色,画出一朵白云,填充白色。使用橡皮工具,擦出白色。让学生操作演示。还有一种方法,用今天学习的“椭圆”工具。教师讲操作过程:

①鼠标指向“椭圆”将光标并单击,选择“椭圆”工具,

②鼠标指向“颜料盒”, 并单击,选择白色,

③鼠标移入画图区,画出椭圆形白云,

④选择“填充”工具,填充白色。

学生练习:画椭圆形白云。

使用“椭圆”工具画太阳。

问:教师为什么能画出这么标准的圆?有什么技巧?

“椭圆”工具画太阳。shift+椭圆

学生练习天空中飘着一个椭圆形汽球

我们学习了用椭圆画白云、用“椭圆”工具画太阳,我们的家园更美丽了,我一定要好好的学习文化知识,将来长大了让我们的家园更美丽

这幅画中的环境真好,你爱在这里吗?我们也要爱护我们周围的在今后的课中,我们将继续学习更多的计算机知识,同时也让我们的环境更美好。

四、课堂检测:

(1)画椭圆时,应选择工具箱中的( )工具。

a. b. c.

(2)画圆时,应同时按住( )键。

a. ctrl b. shift c. alt

本节课通过以上的检测,学生都学会了本节课的知识。不足是绝大多数学习只能听,没有动手练的机会。

说课稿数学 说课稿ppt 篇四

一、说教材

今天我要说的是苏教版小语第五册语文教材中第22篇课文《金子》。课文讲了彼得·弗雷特在淘金无望,便留下种花,终于获得成功的故事。旨在告诉我们要获得财富或成功就必须付出辛勤的劳动,想靠意外的收获是不现实的。课文内容简明,情节曲折,蕴含的道理深刻,是一篇人文性较强的培养学生观察、想像及朗读能力的好材料。“金子”在课文中出现了多次,含义也各不相同。对于学生来说,理解“真金”的含义,体会彼得获得成功的过程,是教学的重点,也是教学难点。因此,我在设计教学时关注了以下几点:

1、努力创设情境,帮助学生走进文本。

我通过引导学生找重点句,抓关键词,创设各种情境,指导感情朗读将学生带入文本,感受彼得在淘金无望时的孤独无助以及种花成功的喜悦。

2、坚持“对话”理念,引导学生理解课文。

课堂上通过学生、教师与文本之间对话,讨论、交流,培养学生理解、欣赏和评价的能力。

3、激发学生的想象,引导学生体验“生活”。

给孩子一个轻松愉快的环境,使孩子充分发挥想象。在交流,体验中感悟“不劳而获只能是个幻想,辛勤劳动才会梦想成真。”“坚持+智慧+勤劳=成功”“劳动创造一切。”

为此,根据课程改革和语文新课程标准的基本理念,我确定如下教学目标:

1、运用已有的识字经验和方法,学会“坑、附”等10个生字,理解新词,能正确、流利、有感情地朗读课文,通过 对 课文的诵读品味,读懂课文内容。

2、以学定教,通过创设情境,讨论、朗读等方式来培养和提高学生语言感悟能力、朗读能力和评价能力。

3、体悟彼得·弗雷特是靠自己辛勤的劳动,终于获得了成功,让学生懂得想要通过意外的收获获得财富或成功是不现实的,必须付出诚实劳动的道理。

二、说教法

由于本篇课文是一篇人文性较强的文章,所以我在本课教学中主要使用了朗读感悟法。

三、说学法

阅读是学生的个性化行为,本课教学中我确定了本课学生的学法以朗读感悟为主,引导学生通过朗读探究性、创造性地感受、理解、评价和鉴赏文章。进而培养和提高学生的思维能力,超越文本,链接生活。

四、说教学过程

根据本课的的教学目标以及第二学段的要求确定,1、2两个目标是教学重点。“金子”的本意是指物质层面的“贵重金属”,而在课文中,“金子”是指

诚实、勤劳的高尚品质。本文用“金子”做题目,同时又以“金子”为线索,贯穿全文,因此,理解“金子”的含义,深化学生的阅读感受是教学难点。我准备安排两课时引导学生达到预设的学习目标。

第一课时:引导学生把课文读正确、读流利,通过图文对照,从整体上感知课文内容,获得初步的情感体验:在语境中理解生字新词,指导两个字“甘”(独体字,注意笔顺)“钱”(左右结构,形声字),注意“盆”和“坑”音节,引发猜想,建构阅读话题,能基本说出本故事的大意。

第二课时:借助多媒体,创设情境,引导学生反复有感情地朗读课文,帮助他们读懂课文内容,了解彼得·弗雷特通过辛勤劳动获得真金的曲折过程,教育学生向彼得·弗雷特学习,培养自己靠诚实、勤劳获得成功的高尚品质。另外,引导学生在反复诵读课文的基础上,开展语文实践活动,进一步激发情感,引导学生积累丰富的语言。

下面,我着重讲第二课时的教学:本课时我打算分四个环节进行组织教学: 复习旧知,精读感悟,拓展延伸,个性作业。

下面我具体地来说一下:

第一环节:复习旧知。

我先引导学生有感情地朗读词语,接着启发学生交流初读课文后所了解的知识,然后根据学生回答,引导质疑“彼得的梦想是什么?他实现了吗?你是从哪里知道的?学生自然而然的就顺着我的问题注意到最后一段的课文,然后引出彼得的话:我是唯一一个找到真金的人,我的金子就在这片土地里,引导出问题:彼得是怎样找到真金的?这是课文的重点也是难点,所以我在上课后不久就提出,目的是让学生有充足的时间去思考。通过这一统领全文的问题,引导学生再次走进文本,去细细地感受。

第二环节:精读感悟,悟中明理。

1、阅读是学生的个性化行为,重在自悟。我以一个开放性的问题“彼得是怎样找到真金的?”要求学生默读课文,边读边划出课文中自己找到的句子。要求先读有关句子,再体会体会。在全班交流时,我以学定教,根据学生的发言相机地出示词句,加以适时点拨。具体指导,品读体味。如学生在自读第一自然段的基础上,扣住“听说、无意”明白消息的不确定性,但淘金者们仍“蜂拥而至”,体会他们缺乏理智,盲目跟从。接着抓住“一无所获、扫兴离去”,体会人们怀着失望离开的不幸。通过对淘金者们由“高兴”至“扫兴”两种截然不同的感情地进一步对比感知,指导有感情地朗读。学习第二自然段时,抓住“埋头苦干、几个月、几乎翻遍了”理解从精力上、时间上、工作量上说明彼得作的别人无法比拟的巨大付出,通过朗读让学生体会彼得是能吃大苦、耐大劳的人,但结果是“没有发现一丁点儿金子”,让学生明白上文的传说的不可靠。在品读词句的基础上,体会彼得由“希望”转向“失望”的失落心情,再次练习个性化朗读。在交流第五自然段时,我让学生读好词语“若有所悟”,并说说彼得“悟”到了什么来具体地展开学习。如“这里没有找到金子”,让学生边读边思考:彼得本来要离开,是什么使他留下来?留下后又是怎么做的?引导学生读好文中相应的句子,并描述一下彼得看到的情景,体会希望的产生,明白这希望就在这肥沃的土地里,正是这希望使彼得留下来。再让学生观察插图,想象彼得是怎样用“全部精力”种花的,此时,我出示图片:每天太阳刚刚升起,彼得就要-----;当夜幕降临时,彼得要------;在炎炎烈日中,彼得要-------;在大雨如注时,彼得要--------。等等,一方面是为了锻炼学生说话的能力,另一方面也让学生们

从内心体会彼得所经历的困难,为下面揭示真金买下铺垫。接着,我把重点放在理解彼得所说的话是什么意思上。让学生思考:彼得从这块土地里究竟获得了什么?你能悟到些什么呢?学生通过交流,知道彼得并非获得真的金子,而是获得了“财富”。最后学生畅谈感悟的基础上归纳:只要勤劳耕耘,任何土地都会奉献出你需要的“财富”。 抓住“不“不无骄傲”、“唯一”等词语,引导学生体会彼得非常自豪的心情,练习个性化朗读。

第三环节:拓展延伸,畅谈梦想。

这个环节是建立在理解文章基础之上,让学生畅谈自己的梦想,培养学生语言表达能力,同时把文本与学生实际联系起来。最后配乐朗诵《梦想》,鼓励学生通过自己的辛勤劳动来实现自己的梦想。

第四环节:个性化作业。

本环节本着语文课程标准要求“关注学生的个体差异和不同的学习需求”的准则,另外,进入中年段以后,阅读教学应拓展学生的阅读范围,拓宽视野,拓展和增加有效的积累,让学生个性作业,可以提高学生的语文素养。

五、说板书设计

板书设计上,我力求简单明了。抓住彼得实现梦想过程中的几个关键性词语,概括文章的主要内容,步步引导,让学生明确只有勤劳才能致富的道理,明白这就是彼得取得的“真金”

说课稿ppt 篇五

我说课的内容是高中数学人教b版选修2-2中第一章第三节的内容——导数的几何意义第一课时。就本课节教学实践,我将从以下八方面介绍我对本节课的教学设想:说考纲;说教材;说学情;说教法;说学法;说教学过程;说板书设计;说自评反思。

由于导数是微积分的核心概念之一,它为研究函数性质提供了有效的工具。近年高考对导数加大了考查力度,不仅体现在解题工具上,更着力于思维取向的考查,它像一条腾跃的龙和开屏的凤,潜移默化地改变着我们思考问题的习惯。数学思想的引领,辩证思想的渗透,帮助着我们确立科学的思维取向。正因如此,导数的几何意义是整个导数及其应用部分中,新课标考纲唯一一个冠以“理解”的要求标准,也是这部分认知领域的最高标准,可见其地位和意义。

教材从数形结合的思想即割线入手,以形象直观的“逼近”方法定义了切线,获得导数的几何意义,学生通过观察、思考、发现、归纳、运用形成完整概念,辩证思想得以渗透,有利于学生对知识的理解和掌握。本节知识内容相当少,但在本节的教学实践中要突出其承前(进一步理解导数的定义,探讨函数值变化快慢)启后(作为研究函数的单调性、求解函数的极值和最值等性质最有效的工具)的关键纽带作用。

通过前两节对函数平均变化率和导数定义的学习,学生对有关导数的问题已经有了初步的认识,但是由于导数定义的抽象性,学生认知起来仍具有一定的困难。本节要通过动态的课件演示,将函数的平均变化率、导数(瞬时变化率)定义生动地展现,同时挖掘切线的斜率(斜率的绝对值的大小与陡峭程度)与函数图像的走势(导数的绝对值的大小与函数值变化快慢)的关联,成为后面研究函数的单调性、求解函数的极值和最值,探讨函数值变化快慢等性质最有效的工具。激发学生的学习兴趣,提升独立探索、解决问题的能力、数形结合的能力及对知识灵活运用的能力。

根据上述考纲、教材、认知的要求,立足学生的认知水平,设定教学目标和重点、难点,从识记、理解、掌握、应用四个层次上给出教学目标,教学重点制定在非智力因素的培养上,教学难点制定在思维能力方面。

教学目标:理解导数的几何意义,会求曲线的切线方程。

教学重点:掌握在某点和过某点的切线问题的求解方法。

教学难点:让学生在观察、思考、发现中学习,归纳总结、启发 学生研究性问题。

备课准备充分,为促进学生思维方式方法形成提供动力源泉。

多媒体辅助教学,通过几何画板的动态演示,能充分发挥其快捷、生动、形象的特点,无需提出问题让学生通过小组议论形式,发现规律,更有利于难点的突破。让学生亲身经历“观察、思考、发现、归纳总结、启发学生研究性”的过程,教师针对各组的结论引导学生用逼近的思维方法,理解导数的几何意义,同时尽量为后面的单调性、极最值、函数值变化快慢等做好总结性铺垫。教给学生思考问题的方法和依据,使学生真正成为教学主体。

通过小组议论形式让学生参与教学活动,促进学生间合作学习与交流,共同探讨问题,探索解题方法,产生互动效果,提高学生的合作意识,共同来完成教学目标。

(一)回顾与引入

回顾函数平均变化率定义及其几何意义;导数的定义及其导数的物理意义,铺设类比迁移情景。提出导数的几何意义是什幺?

(二)导数几何意义的探求过程

1.切线的定义

利用圆的切线与割线的动态联系适时地给出一般曲线的切线定义(避免从公共点的个数来定义)。

2.动态观察割线与切线的关联

通过演示割线的动态变化趋势,为学生观察、思考提供平台,引导学生共同分析,直观获得切线定义。通过逼近方法,将割线趋于确定位置的直线定义为切线,使学生体会这种定义适用于各种曲线,反映了切线的直观本质,从而归纳出导数的几何意义。这里教师要引导学生归纳总结曲线在某点处切线与曲线可以有不止1个公共点。直线与曲线

只有一个公共点时,不一定是曲线的切线。

3.通过例题体现应用,归纳求解步骤。

七、说板书设计

课题:

回顾:例1.求在指定点处的切线

练习:

几何意义:

例2.求过指定点处的切线

切线的理解:

例3.探索已知切线的斜率求切线方程问题

小结:

作业:

在本节课教学过程中对学生的观察能力、分析思考能力、理解归纳能力及数形结合能力方面进行了训练和考验。注重合作交流,归纳总结,及时对各组学生所取得的成果进行肯定,从而使学生获得成就感。既注重“双基”,又兼顾提高,为学生指明课后继续研究的方向,同时也为以后的学习陈设铺垫,激发学生探索新知识的兴趣。

说课稿数学 说课稿ppt 篇六

大家好!

本节课是电子工业出版社出版,宁夏教育厅教研室编著的义务教育教科书,小学信息技术三年级上册中模块1《画一画美丽的宁夏川》,第1单元《认识电脑》第2课时的内容。

本节课在本单元教材内容的编排上处在学生认识计算机设备和windows桌面,并掌握启动计算机方法和熟悉关闭计算机步骤的基础上,在学生认识鼠标和鼠标指针并掌握其握法的前提下,进一步学会熟练地使用鼠标,为得心应手地使用计算机做好准备。

对于刚上三年级的学生来说,既具有对电脑充满好奇的心理,又具有怕操作不当造成计算机设备损坏的恐惧心理,且具有通过鼠标操作玩游戏的冲动。通过前面对计算机的认识,初步了解了计算机的组成设备和windows桌面,并掌握了计算机的启动方法和熟悉了关闭计算机步骤,产生了通过鼠标来操作计算机的迫切心情,特别是通过认识鼠标和鼠标指针,并掌握其握法以后,进一步激发了学生学会熟练使用鼠标的兴趣。

结合对教材和学生实际情况的分析,根据学生的心理特点,特制定如下教学目标:

1、掌握鼠标的移动、指向、单击、双击、拖动

2、让学生经历演示观察的过程,学会主动思考并探寻解决办法;经历相互讨论,汇报交流的过程,学会准确地描述日常操作;经历分析比较的过程,学会辨别并根据需要运用所学

3、学生通过体验情景环节,培养学生辨别是非的能力,通过动手操作,激发学生的学习兴趣,体验探索与创造的快乐。

根据教材对鼠标基本操作的编排顺序和知识结构体系,我确定本节课的教学重点是:

鼠标的单击、双击、拖动。

根据学生怕操作不当损坏鼠标的恐惧心理,学生在鼠标操作过程中出现双击动作不连贯,拖动鼠标时两个手指同时按住鼠标移动的情况,我确定本节课的教学难点是:

鼠标的双击和拖动

根据《中小学信息技术课程指导纲要》的要求,教育课程改革理念和本册教材的结构和体例,我确定具体教学以任务驱动为主,在任务的设置上一是采用常规教学任务,并结合教材中的试试看。

如:在教学鼠标的指向时,让学生试试看:将鼠标指针移动到任务栏左端的开始按钮上,停留一会儿,看看有什么反应;再把鼠标指针移动到任务栏右端的几个按钮上,停留一会儿,看看有什么反应?让学生通过实践和探究,既提高了学习兴趣,又体验到了计算机的奥妙。

二是创设围绕课题展开的情景游戏任务,激发学生兴趣,让学生在学中玩,玩中练,寓教于乐,在游戏的过程中习得技能。

如:我创设了鼠标像“小老鼠”,猫错把鼠标当“小老鼠”抓,引导学生抓捕真凶小老鼠还鼠标清白这一情景,并围绕这一情景任务制定了抓捕计划,每个计划分别设计了相对应的情景游戏,在完成情景任务的过程中练习鼠标操作。

计算机教室、教学课件、教学用小游戏、学习评价量化表

(一)创设情境 制定计划

创设鼠标像只“小老鼠”,被猫误以为是“小老鼠”抓住,引导学生认识到鼠标是被冤枉的,要抓住可恶的小老鼠还鼠标清白这一情景,制定有趣的抓捕计划和相对应的情景游戏,激发学生兴趣。

计划一:蹲守、围堵,实施抓捕小老鼠(失败,小老鼠逃脱)

游戏:猫蹲守围堵小老鼠,不让老鼠从洞口逃脱,让学生练习鼠标的移动

计划二:围住藏匿地点,加派人手,再次实施抓捕(抓捕成功)

游戏 :围住小老鼠,等老鼠从洞口出来就砸用锤子将老鼠砸晕,抓住小老鼠,让学生练习单击

计划三:严惩小老鼠,还鼠标清白(将小老鼠拖去喂猫)

游戏:通过拖动将小老鼠送入窗口给猫当午餐,让学生练习拖动。

(二)探究新知 苦练本领

借助情景计划,引导学生要想使抓捕行动更有效,必须苦练基本功进入常规教学任务当中。

1、鼠标的移动:握住鼠标在桌子上滑动

任务一:根据教师口令从上、下、左、右、左上角、右下角、右上角、左下角几个方向上移动鼠标,让学生动手操作并指名学生演示。

2、鼠标的指向:把鼠标指针移动到某个图标上,按钮上或需要的位置。

试试看:将鼠标指针移动到任务栏左端的开始按钮上,停留一会儿,看看有什么反应;再把鼠标指针移动到任务栏右端的几个按钮上,停留一会儿,看看有什么反应?将鼠标指针再指向我的电脑图标,看看有什么反应?

3、鼠标的单击:用手指快速地按一下鼠标按键后立即松开。

试试看:把鼠标指针移动到某个图标或按钮上,分别单击左键、右键,观察图标有什么变化?(学生讨论、汇报)

4、鼠标的双击:用手指快速地连按两下鼠标左键后立即松开。

试试看:将鼠标指针指向桌面上的“我的电脑”图标,双击它,看看电脑桌面会有什么变化?

任务二:让学生指向我的电脑窗口上的三个按钮了解它们各自的名称,并单击最大化和还原按钮观察窗口变化。

5、鼠标的拖动:将鼠标指针移到某个对象上,在按住左键不松开的情况下移动鼠标,当鼠标指针移到需要的位置时再松开左键,图标就会移动到这个位置。

试试看:把鼠标指针移到“我的电脑”窗口右下角边框处,看看指针有什么变化,指针形状改变后,按住左键拖动鼠标,看看窗口怎样变化?单击关闭按钮能不能关闭窗口?

(三)实施计划 展示技能

进行完常规教学任务以后,让学生进入情景任务运用所学实施抓捕计划,通过游戏对小老鼠实施抓捕,练习鼠标操作,使学生更熟练的使用鼠标。

计划一:蹲守、围堵,实施抓捕小老鼠(失败,小老鼠逃脱)

计划二:围住藏匿地点,加派人手,再次实施抓捕(抓捕成功)

计划三:严惩小老鼠,还鼠标清白(将小老鼠拖去喂猫)

(四)巩固练习 接受表彰

完成情景任务后,通过游戏“小奖状”中的奖状,对学生抓捕小老鼠有功进行表彰,让学生进行鼠标单击、双击、拖动综合练习。

学习表现评价量化表

说课稿数学 说课稿ppt 篇七

“圆的认识”是九年义务教育六年制小学数学第十一册第四单元“圆”中的第一节课。这节课的内容包括:圆的特征、圆心、直径和半径。

“圆的认识”是在学生直观认识圆和已经较系统地认识了平面上直线图形的基础上进行教学的。它是学习曲线图形的开始。它与“圆的周长和面积”、“轴对称图形”的学习关系十分密切。所以正确树立圆的表象,掌握圆的特征,是本课的首要任务。

根据教学内容、教学大纲要求以及学生的认识特点、年龄特征确定本节课的教学目标为:感性目标:使学生认识圆,掌握圆的特征;理解和掌握在同一个圆里半径和直径的关系。

理性目标:让学生通过观察、实验、等数学活动过程认识圆,进一步发展空间观念和初步的探索能力,感受到圆的美。

本节课的教学重点是掌握圆的特征;理解同圆或等圆中半径和直径的关系。因为这是今后系统地学习“圆”的知识的重要基础。

根据教学内容知识间的内在联系和学生的认知规律,遵循教学有法,教无定法,贵在得法的原则:

1、根据本节课的教学内容及学生的认识水平和认知规律,这节课采用演示、操作等直观方法进行教学。通过教师的教具演示和学生的画、折、量等动手操作,使学生获得充足的、丰富的感性材料。在充分感知的基础上,通过叙述操作过程,把感知经过思维转化为表象,并在教师的指导下,抽象概括出圆心、半径、直径等概念。

2、在教学中充分利用学生生活中的问题,引导学生通过自主学习去思考问题,掌握知识。认识圆的特征,探索求圆的特征的方法,使学生在自主的活动中学会学习。

进行了如下设计:

(闭眼联想)八月十五,中秋,全家人团聚一起,品月饼,赏圆月当空。门前是一片平静的湖面,一滴水从上面滴入后,在水面上荡一圈圈水纹。在这一句话中你感觉到这些景色美吗?那些事物与景色与本节课内容有关?

1、初步感知圆

首先让学生举例说明生活中哪些物体的形状是圆的。让学生初步从生活中感知圆,培养空间想像能力, 形成正确表象——圆是一种平面上的曲线图形。

(1)找圆心

首先让学生把事先准备好的圆形纸对折后打开,用笔和直尺把折痕画出来,并在圆形纸的其他位置上重复上面的折纸活动二、三次。操作后,问:“你发现了什么?”学生亲手操作后,发现所有的折痕都会相交于一点。这些折痕都相交于一点,正好在圆的正中心,我们数学上把这一点叫作圆心,用字母“o”来表示。设计意图:通过学生的直观操作,使学生的学习过程“动作化”,调动学生多种感官参与学习,并有意设置一些认知冲突,让学生积极主动地参与知识的形成过程。

(2)认识半径、直径,采取学生独立与文本对话,教师组织学生分析关键字眼的方法进行。设计意图:培养学生阅读文本,对话文本能力。

(3)半径和直径的关系

分组讨论利用“研究发现单”定出研究目标,在一个圆里,半径和直径有什么关系?通过测量和比较,让学生理解和掌握在同一个圆里半径和直径之间的关系,让学生用含有字母的式子表示半径是直径的一半、直径是半径的2倍关系。得出d = 2r与r = 2/d的字母公式,并在练习中通过填表强调了圆内半径与直径的对应关系,还要求学生在圆内一些线段中,找出半径和直径。 设计意图:合理发挥学生的主体作用,让学生动脑、动手、动口、动眼,自主探索知识的形成与发展,并及时巩固学习成果。

练习是巩固新知,形成技能的重要手段,对学生的创新思维能力的培养起着举足轻重的作用,这一部分可通过一些拔高练习达到知识的进一步深化。有机地配合新知的学习,讲练结合,最大限度地发挥习题发展学生思维能力的作用

1、课后作业88页1—4

2、判断题。(对的打“√”,错的打“×”)

经过圆心的线段都是直径。()

所有连结圆上两点之间的线段中,直径最长。()

直径是4厘米的圆比半径是2厘米的圆大。( )

3、猴子造车,一辆轮子是方的,一辆轮子是圆的。

通过“这节课你学会了哪些知识?你最大的收获是什么?你还有什么知识要提出来?”来使学生进一步内化所学的知识,自主地完善自己的认知结构。

板书设计: 圆的认识

圆心:用字母“o”表示。

直径:通过圆心并且两端都在圆上的线段;用字母“d”表示。

半径:连接圆心和圆上任意一点的线段;用字母“r”表示。

在同一个圆里 d = 2 r 或r = 2/d

说课稿ppt 篇八

汉语拼音是学习汉字,学说普通话的工具。对于学龄前的孩子来说学好拼音是很重要的。它将为入小学的汉字学习打下良好基础,但同时也是一门比较枯燥乏味的课,幼儿学完以后掌握的怎么样,发音是否准确,书写是否正确,孩子是否能熟练运用还是一个重要课题。针对这些问题,我根据《新课标》提出的“汉语拼音教学尽可能趣味性,宜以活动和游戏为主”,“积极倡导自主,合作,探究的学习方式”,遵循幼儿身心发展和学习规律,充分发挥师生双方在教学中的主动性和创造性,选择了开放而有活力的,更适合幼小过渡阶段的教学策略。

学前班的幼儿天真活泼,直观形象思维能力较强,容易被新颖的刺激物所吸引,但注意力保持时间有限。对于拼音教学来说,就要根据学龄前幼儿的心理活动特点和认知规律进行设计,变枯燥的拼音符号学习为愉快的学习体验之旅,激发幼儿对拼音的兴趣,并在学习拼音的过程中形成良好的说话和听讲习惯。因此,我对原有教材进行了整合简化,将以往一课所学的字母,基本音节整合在图画和儿歌中,使无意义的拼音内容成为有趣的故事,·孩子们生活中常见的事物,注重了情感态度,知识能力之间的联系。让幼儿知道所学习的知识从生活中而来,能轻易进入课堂所创设的情境,减轻学习压力。

根据课程对拼音教学的要求,教材特点,结合幼儿的实际情况,本次说课将围绕该三部分内容的教学展开阐述。

(一)知识目标:学会前鼻韵母un,读准音,认清形。

(二)技能目标:能够正确书写un,读准un的四声。

(三)情感目标:让幼儿在学习拼音的过程中收获到快乐,体验到成功的喜悦。

重点:un的发音、un的四声和un的书写。

难点:un的发音和un的四声读法,为第二课时的拼读教学做准备。

教具准备:拼音卡片、图片。

围绕以上的教学目标、教学重难点以及学生的学情,我将从以下几个方面设计本课的教学过程:

1.创设情境,复习导入。

2.借助图画“两只蚊子”的故事引出前鼻韵母un。

3.利用图画蚊子翅膀的形态利于记忆的特点,识记前鼻韵母。

4.通过教师示范、学生模仿的形式认读前鼻韵母un。

5.以游戏"开火车"的形式固前鼻韵母un的认读。

6.利用“un的四声自编儿歌”巩固前鼻韵母un的四声练习。

7.通过情境叙说“请un回家休息”来帮助幼儿记清"un"的书写格式。

鉴于学龄前幼儿活泼好动,易于接受直观、生动事物的特点。在教学中,我努力创设丰富多彩的教学情境,将抽象、枯燥的汉语拼音同有趣的游戏、儿歌、故事、比赛等结合起来,把幼儿带入一个“有声有色”的拼音乐园中去学习。如在复习导入这一环节中,我设计了介绍老朋友见面认识就打招呼的情节调动幼儿的学习兴趣,充分激发幼儿的学习欲望。老朋友是已学过的前鼻韵母an`en`in及其四声,介绍的过程在于巩固已学的3个前鼻韵母的发音为后面的拼读作准备;利用两只蚊子的故事并观察图画蚊子翅膀的形态(一只蚊子翅膀朝上,一只朝下)来让幼儿识记前鼻韵母un;在课堂上让幼儿开火车接读拼音;用“我来问你来答”的形式让幼儿根据自己以往的拼读经验读出un的四声并自编四声儿歌等,让幼儿在学中玩,玩中学,寓教于乐,使拼音学习变得生动有趣,充满吸引力。

幼儿是课堂教学的主体,是学习活动的主体。所以在教学中,我们应尊重幼儿,让幼儿做学习的主人,充分发挥他们的主动性和创造性。在课堂上我们力求做到:要扶的扶,能放的放。采用“先扶后放”逐步放手的方法,鼓励幼儿运用已有知识去自主探究新知识。如,在教读前鼻韵母的时候,我先领着幼儿读,当幼儿基本掌握发音方法后,我通过“我当小老师”的形式鼓励幼儿来领读;分组比赛读,男生女生谁更棒等多种形式,不仅让幼儿的潜能得到发挥,让他们的自信得到飞扬,而且他们能够体会到成功的喜悦,更加激起了他们主动学习的愿望。

儿童学习汉语拼音,是一个从言语实践中来,又回到言语实践中去的过程。在教学中,我努力地为幼儿创设一种语言环境,让幼儿在具体的语言情景中学习音节,如,当学完了前鼻韵母un的四声后,让幼儿用戴声调的un组词、造句;还通过自编儿歌激发幼儿的学习欲望,并在儿歌中读准其四声的发音。如:一声un温度温度un,un,un;二声un蚊子蚊子un,un,un;三声un站稳站稳un,un,un;四声un问题问题un,un,un......因为“温度”“蚊子”“站稳”“问题”是幼儿在日常生活中用过和听过的。通过自编儿歌唤起他们的记忆,从生活中找准读音有助后面的新知识学习,加强学习与生活的联系。这样他们才会学得更主动、更快乐、更有信心。

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