Applciation Essays
Luigi is correct........I am involved in the admissions process at a large, public university, and it is easy to tell if someone else wrote or "over assisted" in the writing of a letter. YOu don't want that to be perceived.
Certainly have someone look it over for grammar and spelling, but the guts of the essay has to come from you. Concentrate on telling the "story" of who you are, where you have been, where you want to go, and why the Academy is right for you as well as why you are right for the Academy.
Don't just give names, dates, etc..... Admissions people want to get to know you as a person...so don't concentrate on just the "what", tell them "why" you are seeking this career and life path.