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2、通过观察，学生能自主总结10以上基数词的构成规律。
（3）情感目标:
1、了解一些数字的中外习俗。
2、通过学习，能够形成正确的消费价值观。
二、重难点?
1.重点：能够正确运用购物用语“How much?is?...?? ?----It' s ....
How much?are?...? ?----They're ?.....”，并能在真实的环境中进行交际。
2.难点：通过观察，总结10以上基数词的构成规律。
三、教学方法：听说法，情景教学法。
四、教学准备:?课件
五、教学过程
Step1: Greetings and lead- in.
Sing a song ?Ten Little Indians.
T: There are some numbers in this song. Can you write the numbers from 1 to 9 . Can you say the numbers from 10 to 100 ?
(小学课本学过1-50,检查学生对学过的基数词的掌握程度，以便有针对性地加强个别数词的学习。)
Step2: presentation.
1. Use the media to show pictures about food and clothes ,then present the numbers10-31.For example:
T: How much is the blue sweater?
Ss: It is ＄10. Use the same way to teach the others.
2. Listen and repeat.（1a）(?通过让学生听磁带原声来指导发音，有利于学生说纯正的英语。)
3. （1b）
①Write the numbers in 1a next to the correct words. Then check the answer by reading the numbers loudly.
②Which rows of numbers are in the wrong place?
③.Talk about some numbers ' special meanings in China and some foreign countries .?
④. Work in groups and try to find out the rules in the numbers.
a. one, ...... ten ,eleven ,twelve?? (1至12应逐个记忆 )
b. thirteen, ..fifteen, .....eighteen....( 13至19均在个位数后加-teen, 发/ ti:n / )
c. twenty, thirty,.... ?(20至90均在个位后加-ty , 发/ ti / )
d. twenty-one,,,,, twenty-nine(“几十几”要在个位数和个位数之间加连字符，读and ）(由于基数词的变化有一定的规律,注意引导学生发现数词的构成规律，有利于更容易地掌握基数词。?)
Step3: Learning tasks.