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By the end of the class, the students are able to:
Master the important words, phrases and sentences.
Grasp the usage of preposition in, on and at.
Grasp the usage of adverbs of frequency.
Use the preposition of time and adverbs of frequency in the real situation.
教学程序设计：
Step1: Lead-in
Free talk
T: What do you like to do on Saturday and Sunday ?
S1: I like staying at home and playing games.
T: I think you should go out and enjoy the beauty of nature.
S2: I like going shopping with my friends.
T: Sounds good. For me, I like flying kites with my son in the park. You know, autumn is the best season to fly kites. What else can we do in autumn?
S3: We can have a picnic, go climbing, visit the park on a sunny day.
T: Very good.
Show these sentences with in, on, at. Ask students to discuss in groups when we use in, on, at.
What do you like to do on Sunday?
Children’s Day is on June 1st.
Children Have much fun on Children’s Day.
Amy goes swimming on Sunday morning.
We begin our class at seven o’clock.
Children in China start school at 6 years old.
We can fly a kite in autumn.
We plant trees in March.
My parents take a walk in the evening.
I was born in 1990.
Q: How do we use prepositions “in, on, at” to talk about time?
设计目的：英语教学是教师教学生学的双向活动，也是师生之间通过活动进行情感、兴趣、能力的心理交流，在组成教学的各个动因中，学习情绪的培养、兴趣的提高、教学氛围的营造和对学生的评估是十分重要的。所以设置真实的语境，从学生熟悉的话题入手是非常重要的，好的开端能事半功倍，一开始就激发学生开口用英语对话的欲望，让学生能在老师的一步步带领下用英语完成对话任务，进而引出本课的第一个语法内容。并通过小组讨论的方式让学生自己发现规律，这几个时间介词用在什么前面，用来修饰什么。
Step2: Presentation (preposition of time)
The students conclude the usage of in, on, at and the teacher adds the rest.