3B Unit5 Plus and minus (Part A)

第一篇：3B Unit5 Plus and minus (Part A)

牛津小学英语3B Unit5 Plus and minus(Part A)

教学目标：

1.熟练运用What‟s … plus …?It‟s …What‟s … minus …?It‟s …Yes, you‟re right.Sorry.You‟re wrong.2.在学习中感受合作和竞争的快乐，激发学习兴趣。

教学重难点：熟练掌握句型。

教学准备：PPT

Step1 Crazy English

1.每组开火车式进行简单对话，计时，比赛。

2.讲解本节课的夺星大战：本节课分为两大组进行比赛，任务完成好的加颗星。

Step2 Revision

1.Count the numbers from 1 to 20.Then from 20 to 1.2.What‟s missing?(Some numbers.)

3.Little translator: Translate some phrases.Step3 New words and sentences

1.“plus”

(1)T: How many birds can you see ?

S: I can see six birds.T: Look, two birds are coming.Now, how many birds can you see?

S: I can see eight birds.T: Yes.Six plus two is eight.(2)教读plus: 跟读、三遍读、分组读。试读busbutduck 教读six plus two

(3)Practice: 1+11+21+31+45+55+106+96+11(PK)

2.What‟s … plus …?It‟s …

(1)T: How many apples ?

S: Five.T: What‟s five plus two?

S: It‟s seven.教读：What‟s five plus two ? 跟读、分组读、AB句师生读。

（2）Practise: 2+4=？ 8+1=？ 7+7=？ 6+6=?2+12=?5+14=?(PK)

3.That‟s right.（1）T: What‟s ten plus four ?

S: It‟s fourteen.T: That‟s right.教读：That‟s right.跟读、三遍读、横竖排读。

（2）Practise：Let‟s ask Lan Yangyang.Listen and judge.S: 5+6=?13+3=?17+2=?6+12=?That‟s right.4.Sorry.You‟re wrong.S: What‟s nine plus five?

Lan Yangyang: It‟s thirteen.T: Sorry.You‟re wrong.教读：先教读wrong,再整句教读，三遍读，男女生读。

5.minus

(1)Sing a song „Ten little Indian boys‟

(2)Choose ten students.They stand in a line.Other students ask them‟Come here, xxx.‟

(3)Ask the last student „ Excuse me, What‟s ten minus nine?‟ The student try to answer‘It‟s one.‟

(4)教读minus:三遍读、分组读、指名读。

(5)Read together：What‟s ten minus nine ?

(6)Practise : What‟s … minus …?It‟s one.That‟s right./ Sorry.You‟re wrong.(PK)

(7)Game: Guess the numbers.一位同学猜，其他同学以plus 和 minus 提示。

Step3 The text

1.Watch the text cartoon.2.Follow the tape.3.Read the text by themselves.Step4 Practise

1.Read the passage and answer:

Spring(春天）is coming.Time to go on an outing（远足）.There‟re（有）two friends in front of（在…… 前面）Lan Yangyang and seven behind him（在他后面）.How many sheep（绵羊）? 2+7+1=10

2.总结得星数，做终极挑战：选择一颗星或三颗星的题目，答对了即可得到相应的星星。

一颗星是选择题，三颗星是听录音写算式。

Step5 Homework

1.跟录音读课文3遍。

2.出一些加法和减法的算术题考考你的小伙伴，比比谁更棒！