2020年三年级科学下册 风的观测教案 大象版.doc

2020年三年级科学下册 风的观测教案 大象版一、设计思路本堂课由寻找风的踪迹开始，逐渐进入判断风的方向。通过学生用自己的风向标测定风向，初步知道测定风向的方法。并能利用周围事物的现象对风向作出判断，进一步巩固风向的概念。第二步，通过吹纸风车体验到风是有力量的，风的大小是可以测量的。第三步，通过学习书本上的风力表，明白生活中人们对风力的大小作了等级规定。然后，根据书上图中的现象作出风力大小的判断，最后，到操场上对今天的风力大小作出判断，从而初步形成风力大小的概念。二、教学目标: 1、用简单的方法测定风向。2、感受风的力量，设计制作简单的装置测定风力的大小。3、能初步判断风力的大小及等级。4、经历测定风向和风力的过程。三、教学重点：初步判断风向和风力的大小。四、教学难点：根据观察到的现象判断风向和风力的等级。五、器材准备：风向标 风车材料。六、教学环节1、导入风是什么样子的？我们怎么知道起风了？学生根据生活经验回答。2、测定风的方向（1）、和老师一起去操场寻找风好吗？一起到操场上寻找风的踪迹，并作好记录。（2）、你有办法知道吹的是什么风向吗？用自制的风向标测定风向。在测定风向的过程中有什么问题吗？怎样解决呢？学生提问题、讨论问题、解决问题的方法。（2分钟内出现次数最多的风向是当时风向）（3）、讨论：旗帜、烟飘去的5和风向有联系吗？请说一下吧。2、风有力量（1）、同学们，我们能测风向了，那么同风向的风一样吗？你有办法知道风的大小吗？学生思考后回答。举例说明风是有力量的，力量是有大有小的。老师简介一下气象站也有用风杯的转动来测定风力大小的方法。（2）、现在，我们照书上的方法制作一个纸风车。学生按书本方法制作风车。对风车吹气，仔细观察，钮扣有什么变化？这种变化和你吹的气有关系吗？学生吹风车后思考、讨论并把自己的看法说给全班听。3、风力的大小（1）、现在，我们知道风是有力量的，有风向的。谁能说一下电视、广播里是怎样报风的情况的？学生回忆后发言。（2）、那么，你知道今天的风是几级吗？依据是什么？一起来看看书上是怎么规定的？学生思考回答。仔细看书中的风力等级表。大家来判断一下书中的四幅图里的风是几级？学生观察后回答。（3）、我们去操场上观察一下，今天是几级风？学生到操场观察并记录，回教室后对观察记录的结果进行比较。附送：2020年三年级英语上册Unit1Happybirthday!教案外研版 一、教学内容： 单词：happy, birthday, here, cake. 句型：Happy birthday! Heres your present. 二、教学目标： （一）知识目标： 1. 能听会说：happy, birthday, here, cake. 2. 会用：Happy birthday! Thank you. 3. 会用：Heres your present! (二)能力目标： 让学生在教师设计的一系列任务中练习所学单词，达到“活学活用”的目标，培养学生在生活中使用英语的交际能力。 （三）素质目标： 培养学生认真倾听,仔细观察,善于模仿和合作学习的精神。 （四）情感目标： 让学生在听听，说说，做做，唱唱等活动中轻松学习英语，激发学生学习的兴趣，帮助学生养成良好的学习习惯，形成有效的学习策略，使学生逐步获得运用英语的能力。 三、教学用具 多媒体，点读笔，蛋糕，蜡烛，一个纸盒，几支钢笔，铅笔，几张动物图片。 四、教学过程 (一) Warm-up 1. Greeting T: Good morning, boys and girls! S: Good morning, Ms Zhou! T: How are you? S: Im fine, thank you. And how are you? T: Im fine, too. Thank you. 2. Sing the song “Ten little fingers.” 3. Game: Take out a box with some pencils, pens and pictures in it. Ask three students to touch the objects. Then the teacher asks “Whats this?” They should answer “Its a/an ” (二) Present task 1. Show some pictures which are covered some parts on CAI. Let the students watch and guess “Whats in each picture?” Then practice: T: Whats this? S1: Its a pen. T: Whats this? S2: Its a black cat. . 2. Show a picture of a birthday cake and ask “Whats this?” The students can answer in Chinese “蛋糕” ,Then the teacher repeats “ Its a cake. Its a birthday cake.” Write “birthday and cake” on the blackboard, teach the two words several times. (三) Learn mew knowledge. 1. Tell the students “This birthday cake is for Huang Huilan and Huang Yalan. Today is their birthday.” Then ask “What should we say when somebody has a birthday?” Help the students say “Happy birthday!” Write the sentence on the blackboard and teach “happy” “Happy birthday!” 2. Tell the students when somebody says “Happy birthday to us, we should say thank you!” Write the sentence on the blackboard. 3. Let the students say “Happy birthday!” to the twins. Then the twins should answer “Thank you!” 4. Ask “What should we give when somebody has a birthday?” The students may answer in Chinese “礼物”，“Yes, present” Write “present” on the blackboard and teach it. Then say “We should give him/her a present, and say “Heres your presents.” Write this sentence on the blackboard. Say it again, students repeat several times. 5. Game “Lost and found” Collect some objects from the students, put them on the teachers desk. Ask two or three students to be a keeper, and return the objects to the owners “Heres your pen/pencil/book ” The owners should answer “Thank you!” 6. SB. Activity One. Play the tape, ask the students to look and listen, then answer questions “Who is having a birthday? How old is Sam? Whats Sams present?” 7. Play the tape again. The students repeat. 四、Practice. 1. Ask the students to practice the text in pairs. Then ask some pairs to act it out. 2. Have a birthday party for the twins. 五、Finish the task. 1. AB Exercises 1, 2, 3, 4. 2. Learn the song “Happy birthday to you!” 3. Game: Share the cake. 六、Homework 1. Make a birthday card. W