Bravo!  Writing in a second language is hard!

Information Request Letter

Dear Mr Lawrence,  (Mr Lawrence, Professor Lawrence, Dr Lawrence depending on the title used in the contact information)

I am writing to enquire (British spelling) about your summer language courses in England.

I would be grateful if you could give me some information about the courses. Firstly, I would like to know how many students form are in each class and (specially which ages my classmates would have) what are their typical ages. ( in order to adapt me to this new stage of my life in England). Could you also tell me more details about your sports and social programmes (British spelling) and which local what (types of) facilities we would you have there? I wonder, in on the other hand, which what qualifications the teachers have (because I would appreciate knowing it  this in advance).

I would appreciate it if you could send me further information about your language courses and your town (as you show in the advertisement I have seen).

Thank you in advance for your help in this matter.  I look forward to recieving your reply.

Sincerely,

Notes - 

enquire (British) / inquire (American) 

programme (British) / program (American)

modifiers

letter - request letter - information request letter

titles (book titles, movie titles, essay titles)

For titles, all letters are capitalized except prepositions and articles

Information Request Letter

which / what

"which" is for a choice from a limited number of choices, usually known to both the speaker and the listener

"Which meal will you have from the menu?"

"what" is for a choice from a large or unlimited number of choices.

"What is your favorite meal?"

teacher qualifications

"What qualifications do the teachers have?" is correct but blunt and possibly offensive since it asks for proof that the teachers are qualified (with the implication that perhaps they are not qualified).

"Please tell me more about your teachers' training and experience." is more polite.  It assumes that the teachers are qualified and asks for more details.

Requesting information letter Information Request 

Sincerely, 

[name]