Lesson 17ppt配套的板书设计及意图

Let’s do math! 教学设计

Teaching aims: 1.

Ss are able to master the words: twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety and one hundred. 2.

Ss are able to say the sentences: There were.......took away.......how many...... are left. 3.

Ss are able to do math in English. 4.

Ss are able to make math exercise. Teaching difficulties: Ss are able to make math exercises. Teaching importance:1. twenty thirty ...... one hundred. 2.

Ss are able to do math in English. Teaching tools: Hi-teach. PPT Teaching procedure: 1.

Free talk 2.

Introduce myself I’m Sumi Age: 28

Ask Ss to guess Phone number:18312959851 Lucky number:7

Do you have lucky number? S1.....

S2.....

S3..... My lucky number is 3.

You all have lucky numbers. Let’s play a game about numbers T: show the pictures of numbers they have When students see the bomb, they shout “bomb”

4.

Numbers in class Actually numbers are in our class. Look! We have four groups in our classroom. You are group1group2 group3 group4 And you

are number(line1),you are number(line2) 5.

Teach There were OK, now listen to me. Line1 stand up, sit down. T:How many Ss stand up? Ss:8 T:Yes There were 8 Ss. Teach There were...... 6.

T:Line 1 line2 line3 stand up.

Now, you four sit down.

How many Ss are left? Ss: Twenty Ss are left. So 24 minus 4 is twenty. T: Teach.....

are left; twenty minus 7.

Teach “Thirty” in the same way. 8.

T: Numbers are in our life. Listen, what’s the song about?

Ss: Birthday. T:Yes,it’s Bob’s mother’s birthday. Can you guess how old is Bob’s mother’s age? Teach 40.(By listening to the tape) 9.

Look, there is a big gift for Mum. What’s in the box? Guess. A dress($90)

A scarf($80) A pair of shoe(According to the dialogue of Dad and the waiter ) D：

How much are the shoes? W:

100. D:

100? They are too expensive. W:

OK,30yuan cheaper for you. D:

Thank you. Teach: seventy; one hundred. 10.

Fill in the blanks 20,30,40,

,

, Seventy,

,

,one hundred. Teach fifty and sixty. 11.

Read and match.Because of birthday,Dad brought a lot grapes. 12.

Now the door bell ring.Who is coming? Grandma is counting Mum took away thirty grapes How many.......are left? Teach “took away”

13.

A chant. One, two , three, four, five. Let’s count from one to ten.

20 , 30, 40, 50. 50 cakes on the desk. Hungry, hungry. I took away twenty. How many cakes are left? How many cakes are left? 14.

Let’s do math

There were

sixty

candies on the plate. My grandma took away twenty How many candies

are left? 60 – 20 = 40 Sixty minus twenty is forty. Forty candies are left. 15.

Let’s make math exercises and check your group members. There were

__________. ______took away ______。

How many ______ are left?

_____ – ________ =

________ ______

minus _______is ________. _________are left. 16.

Homework. 1. Read the words of lesson 17. 2. Try to do math in English. 3. Try to make math exercise in English.