A letter

Dear Sir or Madam,

My name is John and I am twenty-two years old. I am writing to you in order to explain why I am suitable for the computering course.

I have finished my teaching degree and I would like to improve my curriculum with some extra courses. Nowadays, computers are a very useful tool in the world of (or just get rid of the "the") education, so I think that it is necessary for me to join some this course to expand my knowledge, because as during my studies I used to use computers to do my homework, but I need to look into this subject further.

I am a good student and I have passed all my exams without difficulties, so I think that I would do a good job.

I am interested in your school because I have read that is one of the best computering academies in your (do you live in the same country? Because if you do, you'd use "the" and not "your") country.

If you require further information, please do not hesitate to contact me.

Yours faithfully,

John Cook.

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Lovely letter! 

The things highlighted in red are corrections and the ones highlighted in yellow are things I have added in to help you improve your writing or the formality, but overall you did a great job!

Well done!