Shapes.doc

Shapes 教学目标：（一）知识目标 1通过观察、操作等活动中，让学生认识长方形、正方形、三角形和圆以及它们的基本特征，能判断一个图形或物体的某一面是不是长方形、正方形、三角形或圆，体会“面在体上”。 2体会长方形、正方形、三角形和圆在生活中普遍存在的现象。3. 培养学生的动手操作、思考和探究能力，并发展学生的空间观念。（二）语言知识目标 1 掌握4种图形的英文表达triangle，circle, rectangle, square，能在交流中理解相关语句的英文表达，鼓励学生用中英双语进行交流，以建构语言知识。 2复习已学数词one, two, three, four等，了解边和角的英文名称：side， angle。（三）情感目标：1、培养学生积极用中英两种语言进行交流的意识。2、采用小组合作的学习方式，促进学生相互认同、相互学习、相互交流和团结协作的精神。教学重点、难点：重点：认识长方形、正方形、三角形和圆以及它们的基本特征，能判断一个图形或物体的某一面是不是长方形、正方形、三角形或圆，建立初步的空间观念。难点：准确地用英语说出四种图形的名称。教学准备: 教具：课件、各种图形的纸片若干，具有以上图形的物品。 学具：立体图形、各种图形的纸片若干、练习纸一张Teaching procedure: Step 1 Warm-upEnjoy a song Say a rhymeGreeting（师生以英文互致问候，为学生营造轻松愉悦的双语学习环境；欣赏与教学内容有关的英文歌曲，诵读英文儿歌，为本课的学习打下伏笔，真正让双语课堂“热”起来。）Step 2 Guide in T: Today Ill introduce some new friends to you . Do you want to know them? 今天老师要给大家介绍几位新朋友，你们想认识它们吗？At first, lets look at a picture. Look, there are many shapes around us.我们生活中有很多的图形，shapes.Teach: shapes 并揭题。（从生活中找图形，学生感觉亲切，能激发他们的学习兴趣，激活他们已有的知识经验。让新知识以“新朋友”的身份出现，让学生在心理放松的环境下进入学习状态。）Step 3 Learning and practice T: What shapes can you see?1. triangleLook at the public sign. The face is a triangle.Teach: trianglePPT: T: (1) Is this a triangle?(2) These are triangles.(3) These are not triangles. Can you tell why they are not triangles?小结：A triangle has three sides and three angles. Can you find some triangles in our classroom? 2. circleCan you see any other shapes?Teach: circlePPT: T: (1) Is this a circle?(2) These are circles.(3) Are these circles? How many circles? The Olympic Rings(4) These are not circles. Do you know why?小结：Circles are round. Circles dont have any straight sides or angles. Can you find a circle around us?3. rectangle Look, the face of the window is a rectangle.Teach: rectangle in the same way.PPT: 小结：A rectangle has four sides. These two sides are the same. And the others are the same, too. A rectangle has four angles. All the angles are right angles.PPT: T: Can you find rectangles in our classroom? 4. squareT: How many sides does it have? How many angles? Look at the four sides. All the sides are the same size. So we call it square. Teach: square Square is a special rectangle.(让学生从实物出发，由“体”到“面”，引导学生感知“面”在“体”上这一概念。紧接着通过“认一认”、“辨一辨”、“找一找”等活动让学生自己感知各类图形的特征。同时通过教师讲解，多媒体课件演示，肢体语言等帮助学生理解相关语句的英文表达，学生在这样的语言环境中自然而然说出“This is a triangle.”“ Five circles.”等语句。Step4 操练巩固Today we have learnt about the 4 shapes. They are triangle, circle, rectangle and square.Read the 4 words together.Now lets do some exercises with them. Exercise1. (1)T: Say the name of the shape Ss: Show the right shape (2) Ss: Listen and say the right shapes Which shape has three sides and three angles? Which shape is round? Which shape has four sides that are all the same? Which shape has four sides and four right angles. Exercise2. Look at the screen. Look carefully and find which shape comes next?Exercise3.1. Let the students read the book from P84 to P88 by themselves.2. Draw the shapes just like the children in P89. 让学生拿出学具，仿照书上的小朋友那样画一画。3. Try to find the different shapes of these things.Step5. 应用拓展1、T: There are many shapes in our everyday life. Such as triangles, circles我们的世界也正因为有了各种各样的图形才多姿多彩。Look, these shapes make up these pictures. How nice.What shapes make up these pictures? How many of each shape make up the pictures? Write and number. (见练习纸)2、Use the shapes to make up a nice picture.利用手中的图形make a picture, 拼好后让学生说一说：What shapes make up your picture? How many?(让学生找一找，