教科版三年级科学上册教案.docx

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1、本文格式为Word版，下载可任意编辑教科版三年级科学上册教案 【教学目标】 科学概念： 树是活的植物，生长在肯定的环境里，是有生命的物体。 过程与方法： 初步熟悉真正的观看应当是有目的的，制订观看的方法和步骤有利于观看的进行。 用各种感官观看大树。 借助放大镜、皮尺等简洁的工具对大树进行观看和测量。 用简洁的词语记录观看的结果。 情感、态度、价值观： 懂得从图片上获得的信息是有限的，亲自观看事物会对事物有更多的熟悉。 进展观看大树的爱好，体会到生命体给我们带来的生气勃勃的感受。 在观看过程中，培育与他人合作的习惯。 【教学重点】 了解观看的目标和方法，熟悉到观看的重要性。 【教学难点】 对大树

2、的观看要指向生命体这个核心概念。 【教学预备】 分组材料：一些观看用的测量工具（如皮尺、放大镜等），观看记录纸。 【教学过程】 一、引言 1.校内里、大路旁、山坡上处处我们都能看到植物，同学们对校内里的植物最熟识的是哪些呢？ 2.就让我们从身边的熟识植物大树开头观看讨论吧。 二、看照片上的大树 1.老师讲解：这是一幅梧桐树的照片，请大家认真地看图，你能发觉有关这株梧桐树的哪些特点？ （你能发觉几点？） 2.同学汇报：从图上看大树，我看到了什么？（要求认真倾听，并大胆说出新的发觉，同时区分哪些是真正从照片上获得的信息。） 三、回忆中的大树 1.老师引导：照片拍得很清晰，但是我们从照片上发觉的东西

3、并不多，那么生活中你曾经看到过的大树与这照片上的有什么不一样吗？ 2.同学汇报：回忆我的大树，我曾经看到过什么？ 3.老师激趣：同学们的汇报内容真丰富，有的内容大家都观察过，有的内容有人还从来没观察过，而有人可能从来都没真正看过一棵大树呢？是不是？想去仔认真细地看一棵真正的大树吗？ 4.同学沟通：为什么想看真正的大树？（再去看一看，是不是能看到更多的内容！会不会也有树瘤？是不是也有小动物？是不是还有其它东西？） 5.老师（总结）：这样带着目的去仔认真细看大树的时候，我们的观看活动就开头了。 6.同学小组沟通并汇报：假如现在来到一棵大树下，我想观看什么？我们怎样才能观看到更多的内容？ 四、观看真

4、正的大树 1.沟通：老师引导孩子们沟通在头脑中制订好的观看大树的个人方案。（观看内容、观看方法、需要借助的工具等） 2.活动：现在让我们一起去观看一棵真正的大树，我们确定有更多的发觉。同时把观看到的信息，用简短的词语记录下来。（在保证平安的状况下老师带同学按方案开展真正的实地观看活动。） 3.评价：回教室后每小组相互观赏各自的观看内容，说说从不同的记载中如何体会到观看的大树是一个生命体。同时推选一位同学的记录单张贴于科学活动专栏内供大家观赏，其它同学的记录单上交给老师阅读观赏。（张贴的记录单要有典型特色。） 4.总结：观看一棵树让我们获得了这么多的信息，观看一棵树让我们发觉了一个生气勃勃的生命

5、世界，那么，观看更多的树呢？请在课外连续观看不同的树。 板书设计：略 教学后记：略 延长阅读（英语版）： Scientific concept: A tree is a living plant that grows in a certain environment and is a living object. Process and methods: A preliminary understanding of real observation should be purposeful, and the method and procedure of making observations

6、 is conducive to observation. Look at the tree with all kinds of senses. The tree is observed and measured with a simple tool like a magnifying glass and a ruler. Record the observations with simple words. Emotions, attitudes, values: There is a limit to how much information can be obtained from pic

7、tures, and observing things in person will have more awareness of things. Develop the interest of looking at the tree and experience the vitality that life brings to us. Cultivate the habit of cooperating with others during observation. key points of teaching Understand the goals and methods of obse

8、rvation and recognize the importance of observation. Teaching difficulties Observation of big trees points to the central concept of life. teaching preparation Grouping material: some observation measuring tools (such as a ruler, magnifying glass, etc.), observe the recording paper. teaching process

9、 I. introduction On campus, on the road, on the hillside. We can see plants all over the place. What are the most familiar to the plants on campus? Lets start with the familiar plants around us. Look at the tree in the photo This is a picture of a plane tree. Please look at the picture carefully. Wh

10、at features can you find about the plane tree? What time can you find out? Student report: looking at the tree, what do I see? (to listen carefully and speak out for new discoveries, and to distinguish what is really from the photo.) The tree in memory 1. Teacher guidance: the picture is very clear,

11、 but we dont find much in the picture, so what is the difference between the big tree you have seen in life and the one in this picture? Student report: remember my big tree, what have I seen? Addition, (3) teachers: students report content is rich, everyone has seen some content, some people have n

12、ever seen, and some may never really seen a tree? Isnt it? Want to see a real big tree carefully? Student communication: why do you want to see real trees? See if you can see more! Is there a tree tumor? Do you have small animals? Is there anything else? 5. The teacher concludes that our observation

13、 begins when we look at the big trees with purpose. If you come to a big tree now, what do I want to observe? How can we observe more? Look at the real tree 1. Communication: teachers guide the children to communicate in their minds with a personal plan to observe big trees. (observation of content,

14、 observation methods, tools to be used, etc.) 2. Activities: now lets go and observe a real tree, and we must find more. Keep an eye on the information and record it in short words. (in the case of safety, the teacher takes the students to carry out real field observation as planned.) 3. Evaluation:

15、 after returning to the classroom, each group will appreciate their observations, and tell us how to realize that the tree is a living thing from different records. At the same time, I will select a students record list to be posted in the scientific activity column for you to enjoy, and the other s

16、tudents records will be submitted to the teacher for reading and appreciation. (the list of records should be typical.) To sum up: to observe a tree that gives us so much information, to observe a tree and let us discover a living world, so to observe more trees? Please continue to observe different trees after class. Board design: slightly Teaching post: slightly 第 6 页 共 6 页