Writing prompt: Application

Student essay:
Dear Mr.Smith
I am a student in this school.I know you will have some lessens in this term,and Iwant to take part in the Today America.
I am very interested in this class.I can speak English fluently,so it isn't difficult for me to understand what you said.The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.
I hope you can consider me.I am looking forward to receiving you reply.

Corrected essay:
Dear Mr. Smith,
I am a student in this school. I know you will have some lessons in this term, and I want to take part in the Today America.
I am very interested in this class. I can speak English fluently, so it isn't difficult for me to understand what you say. The reason why I want to learn it is that I want to know some differences between American society and Chinese society. And I like the free life and American lifestyle, so I want to know some interesting things about it.
I hope you can consider me. I am looking forward to receiving your reply.