I need help ....It s urgenntt.....Please help me to correct my cover letter

Dear Mr.....,

I'm writing to you to express my motivation to join SCAN section next year. Reading in the document of presentation, I was motivated to forward my resume to see if my qualification might be possible to join SCAN.

As we know, SCAN is a section that provides a multi-cultural environment and an international linguistic dimension. All SCAN students benefit from the same high-level scientific teaching with the specific feature of the SCAN section being that lectures, course work and practical classes are in English. I didn't understand what you meant.

Actually, English is the key of the  international communication. In the world of engineer, english is also the  key giving access to the fortune of scientific knowledge. To become a successful engineer, in the international environment , it might be necessary to master english. That is also my aim .Joining SCAN, I will have a chance to perfect my english, to discover science, as I always love to, with a new methods and a new points of view: the anglophone sciences. And through sciences, does it  also a great way to discover an anglophone culture?
 
"Enthusiastic" was how I characterized my feelings towards SCAN section. As I always love Sciences and Foreign languages, during my secondary and high school, I have learnt sciences in French. With such an experience, I know how effective and interesting will it be, study these scientific subjects through the media of English. Nothing is easy, and SCAN section motivates me also by its challenges.

I am confident in my ability to study in english. For the first year at ASINSA, I had english course with the others french friends ,in the class 2/4. At the end of the first school years, I had .... points for my Toefl.
I believe having a necessary english level that can make sure of my ability to study at SCAN. About the scientific level, I am also ready to confront the new obstacle next year.

Please consider me as a serious candidate for SCAN section next year. I could be reached at the e- mail address below
I look forward to hearing from you and thank you for your consideration.
Yours sincerely,    

Look over the highlighted places.

..........
Group ....
e mail: .....

     As we know, SCAN is a section that provides a multi-cultural environment and an international linguistic dimension. All SCAN students benefit from the same high-level scientific teaching in English with the specific feature of the SCAN.    

    Actually, English is the key of the  international communication. In the world of engineering, English is also the  key giving access to the fortune of scientific knowledge. To become a successful engineer, in the international environment , it might be necessary to master English. That is also my aim .Joining SCAN, I will have a chance to develop my English/ to make my English perfect, to discover science, with a new methods and new points of view, the anglophone sciences. Also with the help of science, I will have the chance to discover anglophone culture.  

     "Enthusiastic" is how I characterized my feelings towards SCAN section. As I always love science (don't use science again and again.I am sure it has a different name, I mean the thing you are talking about.)  and foreign languages, during my secondary and high school, I have learnt science in French. With such an experience, I know how effective and interesting it will be to study these scientific subjects through English media. Nothing is easy, and SCAN section motivates me also by its challenges.
     I am confident in my ability to study in English. For the first year at ASINSA, I had English course with the French friends,clin the ass 2/4. At the end of the first school year, my Toelf score was.....
I believe that having a good knowledge of  English will help me have the chance to study at SCAN. About As for the scientific(not scientific again please, three must a  branch name of this science) level, I am also ready to confront the new obstacle next year.
      Please consider me as a serious candidate for SCAN section for the next year. You can have a contact with me with the e- mail address below.
I look forward to hearing from you and thank you for your consideration.
Yours sincerely,      

I am not sure of punctuation and still fell that this essay is not fluent.