3b unit5
牛津3B Unit 5 Plus and minus一、教学内容
《牛津小学英语》3BUnit5 Plus and minus(第二课时)
二、教学目标:
1.能听懂、会说日常交际用语What’s … plus/minus … ?及回答That’s right. Sorry. You’re wrong. It’s ….
2.复习数字1—20。
三、 教学重点:
What’s … plus/minus …? That’s right. Sorry. You’re wrong.
四、 教学难点:
1.句型:What’s … plus/minus …?
2.That’s right. 的正确读音。
3.能够将数字1—20熟练地运用到句型What’s … plus/minus …? 中去。
五、教学准备:
写有加减题的卡片若干张(错题3张),水果图片
每个学生准备一张小卡片,上面写有20以内的加减法。
六、教学过程:
A.Free Talk.
1. T:Good morning, boys and girls.
Ss:Good morning, Miss Xu.
T:How are you?
Ss:Fine, thank you. And you?
T:I’m very well.Thanks.
2.a.Let’s sing a song ten little indians
b.T:Let’s review numbers from 1-20.Play a game :I say one , you say eleven.OK?
Ss:OK.
T:One,thirteen,…
Ss:Eleven,three…
3.T:Look at our classroom,how many windows /lights/doors can you see?
Ss:I can see…
4.T:Today we will have a match.Group1,group2,group3,group4.Which one is thebest.我们来比一比哪组的同学最出色。Are you ready ?
B. Presentation and practise
1.a.T:Listen and say the next number.5
Ss:…
T:That’s right./Sorry ,you are wrong.(并出示判断符号)
在3-5个学生说正确后学习That’s right.
Right.That’s right.
T:10
S:11
T:That’s right.Say together.
评价学生表现并贴水果图
b.T:下面是老师作的算式题,请同学们来当回老师判断一下。
Ss:That’s right.
T出示错误的算式
引导并学习Sorry,you are wrong.
Wrong.Sorry, you are wrong.
T出示正确和错误的题卡(1和2)
Ss:
T评价学生表现并贴水果图
2. 教师总结所获水果总数。
a.(假设第一组第一次获得2个,第二次获得1个)
T: Look, two pears, one pear. How many pears now?
Ss: Three pears.
T: Yes, that’s right.
板书:2+1,边写边说板书新授单词plus
领读plus ,two plus one,
T带学生一起说:two plus one is three
总结其他三组的水果总数时,T将算式写在水果旁边,带着学生一起说
3.a.教师板书一些加法算式:13+56+12 19+1指名让学生读,然后齐读。
b.T板书…+…=20 看哪一组想的方法最多
Ss:
4.a在板书的加法算式后面直接添上等于号和问号(=?)算式变成了:
13+5=? 6+12=?19+1=?
b同时说:What’s thirteen plus five?
重复几遍进行学习
c.T:Read them by yourselves.
Ss(指名读)
T:Let’s read together.
5.a. T:What’s 13 plus 5?
S:(It’s) six. T:It’s… S:It’s six.
T: That’s right.学习It’s …并领读It’s six.
b.T就13+5、6+12、19+1:What’s …plus…?
Ss:It’s…
T:That’s right.
T:Now you can ask me.你们可以提问我(T出示9+10、8+11)
Ss:
T故意说错引导S:Sorry, you are wrong.It’s…
6.T:XX,what’s 6 plus 7
S:It’s…
T:That’s right.
(T—S S-S 4-5人)
7.T:Excuse me,XX.Let’s ask xx together 并出示算式题(15+5=?\11+6=?)
Ss:What’s …plus …?
S:It’s…
Ss:That’s right./Sorry,you are wrong.(Ss—S 2-3人)
8.work in pairs用准备好的算式卡片
T出示3 pears::Look, I have 3 pears.And this one is for group X.
How many pears can you see?
S: I can see two pears
T: Yes.That’s right.3-1
学习minus, three minus one
9.板书几道减法算式:10-9、12-7、20-11.个别读、齐读
10. T板书…-…=2看哪一组想的方法最多
Ss:
12.在每个算式的 后面添上符号:=?
T:Who can read it.
S1:What’s ten minus nine?
T: That’s right!
学习What’s ten minus nine?
13. 齐读这三个减法算式。
14.a.T:XX,What’s 10 minus 9?
S:It’s …
T:You are right.You can ask me.
Ss:
T故意说错引导S:Sorry,you are wrong.
b.T:Boys ask and girls answer
B:What’s 12 minus 7?
G:It’s 5.
B:You are right./
c.T:Girls ask and boys answer
G:What’s 20 minus 11?
B:It’s 9.
B:You are right./
d.Work in pairs 用准备好的算式卡片
C.Consolidation
1. T:Who want toask me ?谁来给老师出算术题
S:
T:板书
2. Ss work in pairs.
3..出示小黑板:3+5+8=? 20-14-5=
12+7-1=? 15-9+4=?
a. T: What’s 3 plus 5 plus 8?
Ss: It’s sixteen.
T: That’s right.
b. 同法教学12+7-1=?
c. T:Who can read them (20-14-5=?/15-9+4=?)
Ss:
D. Homework.
1. Make a new dialogue like part A
2. Listen to the tape and read after it.
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