2019-2020年四年级上册第四单元信息窗3《两点间的距离与点到直线的距离》word教案.doc

2019-2020年四年级上册第四单元信息窗3两点间的距离与点到直线的距离word教案教学内容：信息窗3，教材55-58页教学目标：1、结合具体内容，理解“两点间所有连线中线段最短”，知道两点间的距离与点到直线的距离。2、在对两点间的距离与点到直线的距离的探究过程中，培养学生观察、想象、动手操作的能力，发展空间观念。3、初步学会交流解决问题和结果，体验数学与生活的密切联系，提高学习的兴趣，学会与他人合作共同解决问题。教学重点：认识点到直线的距离，并能解决一些实际问题。教学难点：利用点到直线的距离解决实际问题。教学准备：多媒体课件直尺、三角板等作图工具教学过程：一、情境激趣，导入新课课件出示情境图，提问：你有什么数学问题？预设：为什么要修隧道？怎样修隧道最近？这里面有什么数学知识？、师：是啊，这当中确实有我们的数学知识，今天我们就一起来探究这其中的数学知识。今天这节课，我将和大家逛几个地方，在一边玩耍中一边从中领悟蕴含的数学道理。请组长到讲台边领取活动材料，注意合理分工，有序安排，看哪个小组的探究活动开展的最有序，最有效。二、组织活动活动一：到对面红旗处1、看一看：三名学生沿不同白灰线路走到红旗处。2、量一量：量一量三条不同白灰线路的长度。3、说一说：你发现了什么？4、想一想：其中蕴含的数学道理是什么？5、找一找：你能举出生活中应用的例子吗？6、辩一辩：看教材，说说什么是”两点之间的距离“。活动二：到对面的直跑道1、看一看：三名学生从自己的位置沿不同白灰线路到对边的直跑道。2、量一量：量一量三条不同白灰线路的长度。3、说一说：你发现了什么？4、想一想：其中蕴含的数学道理是什么？5、找一找：你能举出生活中应用的例子吗？6、辩一辩：看教材，想想什么是“点到直线的距离”。活动三：测量双杠的两个横杆之间的距离1、量一量：测量出双杠的两个横杆之间的距离。2、说一说：你有什么发现？活动四：测量掷铅球的成绩，跳远的成绩。三、课堂交流各小组回到自己座位上，整理自己的活动记录，准备交流。四、应用知识解决问题自主练习2、3、5题五、课堂小结：学生谈一谈自己的收获，评价自己的表现。板书设计距离两点之间的距离：两点间线段的长度点到直线的距离：点到直线的垂直线段的长度平行线之间的距离：平行线间的垂直线段的长度，处处相等。教学反思本节课研究的三种距离，通过课堂的四个活动完成。四个活动中学生很投入，玩得很兴奋，但是课堂很难把握，有的小组活动效果不好。课堂交流时，怎样把活动与教材知识有机结合也是一个值得研究的问题。作为一个实验，这样的课堂学生学习积极性很高，今后有这样的机会将会继续研究。附送：2019-2020年四年级下册Module1Unit2Whatcanyouhear5课时英文表格式教案Language skills:Listening:Identify key words in an utterance by recognizing the stressLocate specific information in response to simple questionsSpeaking:Open an interaction by eliciting a responseMaintain an interaction by providing information in responseUse appropriate intonation in questions and statementsWriting:Develop written texts by adding personal ideas and information to writingDevelop written texts by putting words in a logical order to male meaningful phrases or sentencesDifficult points: Prepositions: Behind, beside, in, on, underWh- question: WhereWhatWhose?Materials: Pictures, recorder, tapesTeaching Times: Five periodsFirst periodContents:Words: piano, recorder, violin, guitar, drum, triangleLanguage focus:Using nouns to identify thingse.g. a pianoDifficult points: Pronunciation: piano, recorder, violin, guitar, drum, triangleTeaching breach: Using the songs to practice the words.ProcedureContentsMethodPurposePre-task preparation1. Song2. Daily talk3. RevisionPs sing togetherT-PP-PWhile-taskprocedureLook and learnWhat can you play?I can playT:(show objects) Look. Whats the shape?P: Its a triangle.P say triangleT: Look, I can play the triangle. TingP say and actT: I have got a drum. Its nice.P read drumP(say and act) : I can play the drum. BoomT:(show) Whose pen is that?The same way to teach; piano, recorder. Violin, guitarT: I can play the What can you play?P answerP-PSing a song together在词汇的教学中注重单词发音的体会，帮助学生根据发音规律来记忆单词。并加强在句子的使用中来学习单词。Post-task activitiesWorkbook page4Our new songP-P ask and answerP use the sentences they have learned before and write simple lyrics由于歌曲容易上口，学生兴趣较浓，学起来较快。HomeworkCopy the words and sentencesSecond PeriodContents:Sentences: Whoseis this? Its Eddies.Language focus: Asking yesno questions to obtain simple responses. Asking wh- question to find out which person something belongs to Using pronouns to indicate possessions Using possessive forms of nouns to show possessionsDifficult points: Asking wh- questions to find out which person sth. belongs toTeaching breach: Using the things to ask and answer. ProcedureContentsMethodPurposePre-task preparation1.Song2.Daily talk3.RevisionPs sing togetherT-PP-PWhile-taskprocedureLook and say hear noiseAsk and answerPracticeT:(tape) Listen, what can you hear?P(read) hearP: I can hear theT: Is it a piece of music? Its just a noise.P(read) noisePs read after the tapeP-P practice the dialogueAct outAsk: Whoseis this?To elicit: Its-.P-PCan you hear a noise?Its aIs it your?Yes, its myNo, it isnt my在这节课中,情景的创设是很重要的,通过声边的东西来操练句型.,达到复习乐器的目的.Post-task activitiesWhose is it?P-P ask and answerP use the sentences they have learned before and write simple lyricsHomeworkCopy the words and sentencesThird periodContents:Words: in, on, under, behind, besideSentences: Wheres? Its.Language focus:Asking yesno questions to obtain simple responsesAsking wh- questions to find out which person something belongs to Using pronouns to indicate possessionsUsing possessive forms of nouns to show possessionsDifficult points:Prepositions: in, on, under, behind, besideTeaching breach: Put the things to practice the words.ProcedureContentsMethodPurposePre-task preparation1.Song2.Daily talk3.RevisionPs sing togetherT-PT show picturesP say: I can playWhile-taskprocedureLook and learnin, on, under, behind, besidePoint and sayWheres Kallys drum?Its behind her chair.Learn the soundThe small ball is on the wall.T:(show pictures) Wheres?P: Its oninunderT show; Is the recorder oninunder the box?P: No.T: Its beside the box. Its behind the box.P read: beside, behindP make sentences with these prep. T: kittys violinAlices recorderEddies guitar.P point as quickly as they canp-p: Ask and anxwerT tapeP listen and read教学中通过摆设文具的位置来学习方位介词,并在此基础上学习使用形容词性物主代词的介词词组.在摆摆放放中学会正确表达.Post-task activitiesWorkbook page 5Spot the differenceP-P ask and answerP use the sentences they have learned before and write simple lyrics在课文的朗读训练上注重学生的语气语调的正确和流畅.HomeworkCopy the words and sentencesFourth periodContents:Words: basket, eat, holeLanguage focus:Using the present continuous tense to describe an action taking place at the time of speakingUsing predicative adjectives to describe feelingsUsing preposition to indicate positionsDifficult points: basket, hole, eating, chasingTeaching breach: Try to act out the story and discuss the end.ProcedureContentsMethodPurposePre-task preparation1.Song2.Daily talk3.RevisionPs sing togetherT-PP-PWhile-taskprocedureRead a storyThe cat and the mouseLearn the soundThe small ball is on the wall.Read and answer practiceT:(show pictures) Whose house is it?Its cats house. Its a basket.P readT show picturesP say sth. about the pictures: The cat is in the basket. It is sleeping. The mouse is hungry. It is eatingT tapeP listen and read P-P: Ask and answerp-p: Act out the story 在故事教学中注重学生的想象能力的培养,让学生想象结果回如何,让学生叙编故事,并通过体温的形式串联起来,便于学生的复述.Post-task activitiesThats not the end of the storyP draw pictures and rewrite the new endingHomework Copy the words and sentencesFifth periodContents: Review the wordsReview the