生日第二课时教案

生日(经历统计的全过程)

教学目标:

1.结合调查班里同学的生日在什么季节,经历数据的收集、整理、描述与分析的过程,进一步获得统计活动的经验。

2.根据统计图回答问题并进行简单推测。

教学重点:

让学生经历统计的过程,体验调查方法的多样性。

教学难点:

能够根据统计图提供的信息,提出和解决问题,并能进行合理地推测。

教学过程:

一、课前复习:

师:Good morning!今天郭老师想要给大家介绍一位新朋友,他很有魔力,大家想不想看看他的真面目呢?

生:

师:他是一顶神奇的帽子,我们叫他思想帽子,和他打声招呼吧!每个人都有一顶思想帽子,如果你思考的越来越多,你的帽子会变得越来越高的。所以他是一顶神奇的帽子。现在我想请你把你的思考帽子带上。Sui

在咱们上这节课之前,郭老师做了一个小调查,调查了一下咱们班同学都喜欢到哪个景去旅游,请看郭老师做的统计表,你从表中发现了什么?

生:去游乐场的人数最多。那我想问问喜欢到游乐场的同学。

追问:你是几月份去的啊!

生:十一。。。。。。

那你知道这是什么季节吗?你是怎么知道的啊!

你真棒啊!

那现在是夏季吗?为什么呢?

二、教授月份:

我们的月份和季节划分是有一定标准的,那咱们仔细观察笑笑是怎么告诉咱们的啊!放一段视频,那你知道了一年的划分,你能帮这些走丢的月份找找家吗?师:现在郭老师问问这位小朋友你最喜欢在哪个月份去旅游呢?

生:4月份,大家一起来告诉我他最喜欢在哪个季节去旅游啊!春季。

师:那你能像老师这样来说一说吗?我最喜欢在哪个月份去旅游,它是属于哪个

季节的。好吗?

生:我最喜欢在5月份去旅游,它是春季。

那现在郭老师要求你把自己最喜欢在哪个月份去旅游,属于哪个季节悄悄地告诉

你的同桌吧!说完就坐直啊!

三、小组活动:

师:郭老师不知道咱们班同学喜欢每个季节分别有多少人?你能来帮帮我吗?现

在我想请你把思考帽子带上。Sui你有什么好的想法吗?先在你们的小组里讨论

一下,讨论好了咱们就坐直。

S:可以举手,然后数一数。

S:可以站起来,喜欢夏季的站一排,然后来数一数。

S:我们可以一个接一个问。然后统计。

S:我们可以用不同的形状来表示来表示四季,然后将形状贴在纸上,然后来统

计形状的个数

师:咱们用自己刚才想出来的办法在小组内进行一下统计好不好啊!先不忙,在活动要求找一名同学来说)这是我发给组长,让组长....

来填一填。(老师要说一下统计表的要求)

统计完咱们就回到座位上坐好。

One、two、three现在我们开始吧!

这一组动作最快了。

师:现在咱们都统计完了,找每组的一名同学来上前面报告你们组的统计结果,

(汇报结果的时候在黑板上填写每组的情况)

师:那他们统计的数据对不对,我们可以怎么样才能知道他们的数据对不对?

生:相加的和是小组的人数。(6组同学分别展示)看黑板,我们知道了每个小

组的情况了,那下面我们应该怎么办啊!

把他们加起来,那这两大组算春天的,这两大组算夏天的,这一大算冬天的,这

一组算秋天的。那这些数据对不对啊!我们要怎么办?

今天我们就一起来学习《统计与猜测》

我们知道了每一个季节分别有多少人喜欢,那现在我们应该来涂一涂统计图了。请看大屏幕这是什么呢?春夏秋冬后面的格子用来做什么的呢?

一个格子表示什么啊!

四、提出问题,并解决

师:你根据统计图表能提出怎么样的数学问题啊!

我们能提出很好多问题是不是啊!现在就和你的同桌说一说吧!(找2组同学说一说他们互相提出的问题)

五、砸金蛋活动

师:大家都喜欢玩游戏吧!老师也很喜欢,那今天就让老师也加入到你们的游戏之中吧!

一起来砸金蛋。(哟!这是来自迪士尼的明信片,谁能来帮大家读一读)

如果Hebe今天没来,咱们没有统计她的情况,你能猜猜她最有可能喜欢哪个季节去旅行吗?

恭喜这是一本书,恭喜这是一张地图。这些礼物不是仅仅送给你们俩的,应该是咱们全班同学的,老师希望大家能读万卷书,行万里路。

六、升华

生活当中也存在着许多统计的知识,让咱们一起来看一看吧!

前几天美国的奥巴马和罗姆尼一起竞选总统,这是在某一时刻奥巴马和罗姆尼的票数统计,看他们的票数,现在谁的票数比较多啊!那你们猜一猜最后谁赢了啊!不是,是奥巴马,只要我们一直坚持不懈,最后的胜利者就是咱们自己。对不对啊!

七、归纳学习

师:在旅途中我们会发现美丽的风景,也会有很多意外的收获,那今天咱们的收获是什么呢?

下课后你也可以做一名小小调查员,制作出一张美丽的统计表。好了,下课。

一、Review:

T: Before our class. Let’s have a warming up. Look at the screen there are 28 oral computational. Can you answer them one by one? One two three Ok! Let’s begin!

T: Our students are very good! We are all right!Give us a five! Today Miss Guo wants to introduce a new friend. He is a magical cap. We call him thinking cap. Let’s say “Hello” to him! Everyone has a thinking cap. If you think more, it will become higher. So he is a magical cap. Now I need you to put your thinking caps on. (sui) Please do the action. (Follow me!)

Now look at the screen. Last semester we have made a statistical table about our favorite fruits. Do you remember it? Which fruit is our favorite ?

S: Banana.

T: Why?

S: The number of the students who like bananas is the most. So…. T: Is she right?

S: Yes.

二、New knowledge:

T: How many days off are there in your national day? Where have you gone with your parents?

S:……

T: Miss Guo wants to ask you which season do you like to have a trip? Before answer this question. Let’s see how many seasons are there in one year. Look at the screen the wise man will tell us.

How many months are there in spring? They are? (四季都问全) Now I want to ask Hebe which month do you like to have a travel?

S:April!

T:Everybody tells me. Which season does she like to travel?

S: Spring.

T: Now we have known four seasons in one year but how to investigate which season do our students like best to travel. It is a big problem. Can you help me to solve it? Now I need you to put your thinking caps on. (sui) Do you have some good ideas?

S: Hands up.

S: Stand in a line.

S: Ask one by one.

S: Use different shapes to present four seasons, then put them on the table , then count them.

T: Oh, excellent. We have thought out of many ways. Now there are four envelops are there on the ppt. There are different investigation ways in it. I will find one student from each group to choose one. Then go back to your seat. Don’t open it. They are secrets. One two three Now investigate. Please be quite.

This group is the fast.

T: Now we are ready. Who can present your group to report your group’s result? First tell us which way do your group use then the result.

T: Is she right? Why?

S: We sum the number then it is your group’s number. So it is right. T: The second group. The third group. I will write them here.

Now it is our statistical table.

Today we will learn Statistic and guess.

According to the table can you try to draw our graph. Please draw them on your table. (找一名同学的统计图在讲台前面投影)

T: From this statistical graph, someone likes to travel on spring, someone likes to travel on summer. What math questions can you think out of ?

1.Which season that students like travel most?

2.How many students like to travel on spring and winter?

T: From this graph, we can think out of many math questions. Now you can discuss with your partners.

T: The lovely chicken sees us discussing very ardently so it wants to join in us. Please stand up.

Now look .If Hebe is not here today. Can you guess which season she likes to travel? Which season does she like to travel most likely in? S: Becau se…….

七、Conclusion

T:This class we have learned well. I am very happy that I know the season which you like to travel. Today what we have learned?

S:汉语说就行。

T:In our real life, there are lots of statistical knowledge. You can go back to your home to investigate what you like then make a beautiful graph. Ok! With this music, the class ends.