Chapter 4 The world of numbers

step 3 while-listening (15~20 minutes)
1. do quiz a in the text book.
2. check the answer.
3. a transitional activity
sence 1: in the shopping mall—— buy things
   mr. li wants to buy a book and a pen. the book costs 58 yuan, and the pen costs 30 yuan. he gives the saler 100 yuan. what is the change?
sence 2: going to the airport——what time to go
   the flight for shanghai will leave in 30 minitues, and it’s 8:20 now. when will the plane leave?
sence3：on the plane——ask height          
   there is a girl sitting next to mr. li on the plane. she asks mr. li how tall he is. mr. li says he is 178 cm. the girl says he is 40 cm taller than her. then how tall is the girl?
sence4: in friend’s house——divide cakes
   there are 12 pieces of cakes in mr. li’s house. they should be divided among 2 kids and 4 other people. then how many pieces of cakes each person can get?
4. do quiz b in the text book.
5. check the answers and make an evaluation.
give a table as follow for each student:
name:_______ scores corecting the wrongs
quiz a   
quiz b   
 aims and effects
preparing for the quiz b.
1. lead to learn the new word “change(找零)”
2. language practice: “…costs…”  “what’s the change? ”

lead to learn the new word “flight(航班)”

language practice: “… taller than…/how tall is…?”

1. lead to learn the new word “kid(小孩)”
2. language practice: “divide…among…”
 

evaluating students’ work to help them correct the wrongs.

step 4 post-listening (5 minitues)
1. show the tapescript for students and let them read it in pairs.
2. pair work (optional)
 circumstance:
there is a new grocery opened near our school. you want to have a look and buy something. please work in pairs and make a dialogue.
examples:
a: can i help you?
b: yes, i’d like to buy 2 notebooks.
a: 1.5 yuan for one.
b: so they cost 3 yuan. here is 5 yuan.
a: thank you, and here is 2 yuan for the change. aims and effects
help students correct the wrongs and drive them to speak out.

this activity is optional. if the time permits, it can strengthen students’ communicative skills in the topic of numbers.

step 5 speaking (8~10 minutes)
1. group work
circumstance:
your school received a gift of 35,000 yuan from mr. tang, an old student of the school. his instructions are:
• the school must use the money to buy three different things;
• a group of students must decide the three things to buy.